- 18 Dec, 2012 40 commits
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Glauber Costa authored
The page allocator is able to bind a page to a memcg when it is allocated. But for the caches, we'd like to have as many objects as possible in a page belonging to the same cache. This is done in this patch by calling memcg_kmem_get_cache in the beginning of every allocation function. This function is patched out by static branches when kernel memory controller is not being used. It assumes that the task allocating, which determines the memcg in the page allocator, belongs to the same cgroup throughout the whole process. Misaccounting can happen if the task calls memcg_kmem_get_cache() while belonging to a cgroup, and later on changes. This is considered acceptable, and should only happen upon task migration. Before the cache is created by the memcg core, there is also a possible imbalance: the task belongs to a memcg, but the cache being allocated from is the global cache, since the child cache is not yet guaranteed to be ready. This case is also fine, since in this case the GFP_KMEMCG will not be passed and the page allocator will not attempt any cgroup accounting. Signed-off-by:
Glauber Costa <glommer@parallels.com> Cc: Christoph Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Cc: Frederic Weisbecker <fweisbec@redhat.com> Cc: Greg Thelen <gthelen@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: JoonSoo Kim <js1304@gmail.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Michal Hocko <mhocko@suse.cz> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Rik van Riel <riel@redhat.com> Cc: Suleiman Souhlal <suleiman@google.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Glauber Costa authored
Every cache that is considered a root cache (basically the "original" caches, tied to the root memcg/no-memcg) will have an array that should be large enough to store a cache pointer per each memcg in the system. Theoreticaly, this is as high as 1 << sizeof(css_id), which is currently in the 64k pointers range. Most of the time, we won't be using that much. What goes in this patch, is a simple scheme to dynamically allocate such an array, in order to minimize memory usage for memcg caches. Because we would also like to avoid allocations all the time, at least for now, the array will only grow. It will tend to be big enough to hold the maximum number of kmem-limited memcgs ever achieved. We'll allocate it to be a minimum of 64 kmem-limited memcgs. When we have more than that, we'll start doubling the size of this array every time the limit is reached. Because we are only considering kmem limited memcgs, a natural point for this to happen is when we write to the limit. At that point, we already have set_limit_mutex held, so that will become our natural synchronization mechanism. Signed-off-by:
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Glauber Costa authored
Allow a memcg parameter to be passed during cache creation. When the slub allocator is being used, it will only merge caches that belong to the same memcg. We'll do this by scanning the global list, and then translating the cache to a memcg-specific cache Default function is created as a wrapper, passing NULL to the memcg version. We only merge caches that belong to the same memcg. A helper is provided, memcg_css_id: because slub needs a unique cache name for sysfs. Since this is visible, but not the canonical location for slab data, the cache name is not used, the css_id should suffice. Signed-off-by:
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Glauber Costa authored
We currently provide lockdep annotation for kmalloc caches, and also caches that have SLAB_DEBUG_OBJECTS enabled. The reason for this is that we can quite frequently nest in the l3->list_lock lock, which is not something trivial to avoid. My proposal with this patch, is to extend this to caches whose slab management object lives within the slab as well ("on_slab"). The need for this arose in the context of testing kmemcg-slab patches. With such patchset, we can have per-memcg kmalloc caches. So the same path that led to nesting between kmalloc caches will could then lead to in-memcg nesting. Because they are not annotated, lockdep will trigger. Signed-off-by: -
Glauber Costa authored
For the kmem slab controller, we need to record some extra information in the kmem_cache structure. Signed-off-by:
Suleiman Souhlal <suleiman@google.com> Cc: Christoph Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Cc: Frederic Weisbecker <fweisbec@redhat.com> Cc: Greg Thelen <gthelen@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: JoonSoo Kim <js1304@gmail.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Michal Hocko <mhocko@suse.cz> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Rik van Riel <riel@redhat.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by:
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Glauber Costa authored
Signed-off-by:
Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by:
Michal Hocko <mhocko@suse.cz> Cc: Christoph Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Cc: Frederic Weisbecker <fweisbec@redhat.com> Cc: Greg Thelen <gthelen@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: JoonSoo Kim <js1304@gmail.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Rik van Riel <riel@redhat.com> Cc: Suleiman Souhlal <suleiman@google.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by:
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Glauber Costa authored
Because those architectures will draw their stacks directly from the page allocator, rather than the slab cache, we can directly pass __GFP_KMEMCG flag, and issue the corresponding free_pages. This code path is taken when the architecture doesn't define CONFIG_ARCH_THREAD_INFO_ALLOCATOR (only ia64 seems to), and has THREAD_SIZE >= PAGE_SIZE. Luckily, most - if not all - of the remaining architectures fall in this category. This will guarantee that every stack page is accounted to the memcg the process currently lives on, and will have the allocations to fail if they go over limit. For the time being, I am defining a new variant of THREADINFO_GFP, not to mess with the other path. Once the slab is also tracked by memcg, we can get rid of that flag. Tested to successfully protect against :(){ :|:& };: Signed-off-by:Frederic Weisbecker <fweisbec@redhat.com> Acked-by:
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Glauber Costa authored
A lot of the initialization we do in mem_cgroup_create() is done with softirqs enabled. This include grabbing a css id, which holds &ss->id_lock->rlock, and the per-zone trees, which holds rtpz->lock->rlock. All of those signal to the lockdep mechanism that those locks can be used in SOFTIRQ-ON-W context. This means that the freeing of memcg structure must happen in a compatible context, otherwise we'll get a deadlock, like the one below, caught by lockdep: free_accounted_pages+0x47/0x4c free_task+0x31/0x5c __put_task_struct+0xc2/0xdb put_task_struct+0x1e/0x22 delayed_put_task_struct+0x7a/0x98 __rcu_process_callbacks+0x269/0x3df rcu_process_callbacks+0x31/0x5b __do_softirq+0x122/0x277 This usage pattern could not be triggered before kmem came into play. With the introduction of kmem stack handling, it is possible that we call the last mem_cgroup_put() from the task destructor, which is run in an rcu callback. Such callbacks are run with softirqs disabled, leading to the offensive usage pattern. In general, we have little, if any, means to guarantee in which context the last memcg_put will happen. The best we can do is test it and try to make sure no invalid context releases are happening. But as we add more code to memcg, the possible interactions grow in number and expose more ways to get context conflicts. One thing to keep in mind, is that part of the freeing process is already deferred to a worker, such as vfree(), that can only be called from process context. For the moment, the only two functions we really need moved away are: * free_css_id(), and * mem_cgroup_remove_from_trees(). But because the later accesses per-zone info, free_mem_cgroup_per_zone_info() needs to be moved as well. With that, we are left with the per_cpu stats only. Better move it all. Signed-off-by:
Greg Thelen <gthelen@google.com> Acked-by:
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Glauber Costa authored
Because the ultimate goal of the kmem tracking in memcg is to track slab pages as well, we can't guarantee that we'll always be able to point a page to a particular process, and migrate the charges along with it - since in the common case, a page will contain data belonging to multiple processes. Because of that, when we destroy a memcg, we only make sure the destruction will succeed by discounting the kmem charges from the user charges when we try to empty the cgroup. Signed-off-by:
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Glauber Costa authored
We can use static branches to patch the code in or out when not used. Because the _ACTIVE bit on kmem_accounted is only set after the increment is done, we guarantee that the root memcg will always be selected for kmem charges until all call sites are patched (see memcg_kmem_enabled). This guarantees that no mischarges are applied. Static branch decrement happens when the last reference count from the kmem accounting in memcg dies. This will only happen when the charges drop down to 0. When that happens, we need to disable the static branch only on those memcgs that enabled it. To achieve this, we would be forced to complicate the code by keeping track of which memcgs were the ones that actually enabled limits, and which ones got it from its parents. It is a lot simpler just to do static_key_slow_inc() on every child that is accounted. Signed-off-by:
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Glauber Costa authored
Because kmem charges can outlive the cgroup, we need to make sure that we won't free the memcg structure while charges are still in flight. For reviewing simplicity, the charge functions will issue mem_cgroup_get() at every charge, and mem_cgroup_put() at every uncharge. This can get expensive, however, and we can do better. mem_cgroup_get() only really needs to be issued once: when the first limit is set. In the same spirit, we only need to issue mem_cgroup_put() when the last charge is gone. We'll need an extra bit in kmem_account_flags for that: KMEM_ACCOUNTED_DEAD. it will be set when the cgroup dies, if there are charges in the group. If there aren't, we can proceed right away. Our uncharge function will have to test that bit every time the charges drop to 0. Because that is not the likely output of res_counter_uncharge, this should not impose a big hit on us: it is certainly much better than a reference count decrease at every operation. Signed-off-by:
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Glauber Costa authored
It is useful to know how many charges are still left after a call to res_counter_uncharge. While it is possible to issue a res_counter_read after uncharge, this can be racy. If we need, for instance, to take some action when the counters drop down to 0, only one of the callers should see it. This is the same semantics as the atomic variables in the kernel. Since the current return value is void, we don't need to worry about anything breaking due to this change: nobody relied on that, and only users appearing from now on will be checking this value. Signed-off-by:
David Rientjes <rientjes@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Suleiman Souhlal <suleiman@google.com> Cc: Tejun Heo <tj@kernel.org> Cc: Christoph Lameter <cl@linux.com> Cc: Frederic Weisbecker <fweisbec@redhat.com> Cc: Greg Thelen <gthelen@google.com> Cc: JoonSoo Kim <js1304@gmail.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Rik van Riel <riel@redhat.com> Signed-off-by:
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Glauber Costa authored
When a process tries to allocate a page with the __GFP_KMEMCG flag, the page allocator will call the corresponding memcg functions to validate the allocation. Tasks in the root memcg can always proceed. To avoid adding markers to the page - and a kmem flag that would necessarily follow, as much as doing page_cgroup lookups for no reason, whoever is marking its allocations with __GFP_KMEMCG flag is responsible for telling the page allocator that this is such an allocation at free_pages() time. This is done by the invocation of __free_accounted_pages() and free_accounted_pages(). Signed-off-by:
Mel Gorman <mgorman@suse.de> Acked-by:
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Glauber Costa authored
Introduce infrastructure for tracking kernel memory pages to a given memcg. This will happen whenever the caller includes the flag __GFP_KMEMCG flag, and the task belong to a memcg other than the root. In memcontrol.h those functions are wrapped in inline acessors. The idea is to later on, patch those with static branches, so we don't incur any overhead when no mem cgroups with limited kmem are being used. Users of this functionality shall interact with the memcg core code through the following functions: memcg_kmem_newpage_charge: will return true if the group can handle the allocation. At this point, struct page is not yet allocated. memcg_kmem_commit_charge: will either revert the charge, if struct page allocation failed, or embed memcg information into page_cgroup. memcg_kmem_uncharge_page: called at free time, will revert the charge. Signed-off-by: -
Glauber Costa authored
This flag is used to indicate to the callees that this allocation is a kernel allocation in process context, and should be accounted to current's memcg. Signed-off-by:
Johannes Weiner <hannes@cmpxchg.org> Acked-by:
Rik van Riel <riel@redhat.com> Acked-by:
Mel Gorman <mel@csn.ul.ie> Acked-by:
Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Suleiman Souhlal <suleiman@google.com> Cc: Tejun Heo <tj@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Frederic Weisbecker <fweisbec@redhat.com> Cc: Greg Thelen <gthelen@google.com> Cc: JoonSoo Kim <js1304@gmail.com> Signed-off-by:
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Glauber Costa authored
Add the basic infrastructure for the accounting of kernel memory. To control that, the following files are created: * memory.kmem.usage_in_bytes * memory.kmem.limit_in_bytes * memory.kmem.failcnt * memory.kmem.max_usage_in_bytes They have the same meaning of their user memory counterparts. They reflect the state of the "kmem" res_counter. Per cgroup kmem memory accounting is not enabled until a limit is set for the group. Once the limit is set the accounting cannot be disabled for that group. This means that after the patch is applied, no behavioral changes exists for whoever is still using memcg to control their memory usage, until memory.kmem.limit_in_bytes is set for the first time. We always account to both user and kernel resource_counters. This effectively means that an independent kernel limit is in place when the limit is set to a lower value than the user memory. A equal or higher value means that the user limit will always hit first, meaning that kmem is effectively unlimited. People who want to track kernel memory but not limit it, can set this limit to a very high number (like RESOURCE_MAX - 1page - that no one will ever hit, or equal to the user memory) [akpm@linux-foundation.org: MEMCG_MMEM only works with slab and slub] Signed-off-by:
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Glauber Costa authored
This is just a cleanup patch for clarity of expression. In earlier submissions, people asked it to be in a separate patch, so here it is. Signed-off-by:
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Suleiman Souhlal authored
mem_cgroup_do_charge() was written before kmem accounting, and expects three cases: being called for 1 page, being called for a stock of 32 pages, or being called for a hugepage. If we call for 2 or 3 pages (and both the stack and several slabs used in process creation are such, at least with the debug options I had), it assumed it's being called for stock and just retried without reclaiming. Fix that by passing down a minsize argument in addition to the csize. And what to do about that (csize == PAGE_SIZE && ret) retry? If it's needed at all (and presumably is since it's there, perhaps to handle races), then it should be extended to more than PAGE_SIZE, yet how far? And should there be a retry count limit, of what? For now retry up to COSTLY_ORDER (as page_alloc.c does) and make sure not to do it if __GFP_NORETRY. v4: fixed nr pages calculation pointed out by Christoph Lameter. Signed-off-by:
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Suleiman Souhlal authored
We currently have a percpu stock cache scheme that charges one page at a time from memcg->res, the user counter. When the kernel memory controller comes into play, we'll need to charge more than that. This is because kernel memory allocations will also draw from the user counter, and can be bigger than a single page, as it is the case with the stack (usually 2 pages) or some higher order slabs. [glommer@parallels.com: added a changelog ] Signed-off-by:
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Tang Chen authored
Add help info for CONFIG_MOVABLE_NODE and permit its selection. This option allows the user to online all memory of a node as movable memory. So that the whole node can be hotplugged. Users who don't use the hotplug feature are also fine with this option on since they won't online memory as movable. Signed-off-by:
Tang Chen <tangchen@cn.fujitsu.com> Reviewed-by:
Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Cc: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: Wen Congyang <wency@cn.fujitsu.com> Cc: Ingo Molnar <mingo@elte.hu> [akpm@linux-foundation.org: tweak help text] Signed-off-by:
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Gavin Shan authored
While allocating pages using buddy allocator, the compound page is probably split up to free pages. Under these circumstances, the compound page should be destroyed by destroy_compound_page(). However, there is a duplicate check to judge if the page is compound. Remove the duplicate check since the compound_order() returns 0 when the page doesn't have PG_head set in destroy_compound_page(). That is to say, destroy_compound_page() needn't check PageHead(). Signed-off-by:
Gavin Shan <shangw@linux.vnet.ibm.com> Acked-by:
Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by:
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Alan Cox authored
This happens to do the right thing in all cases on fibre channel but not on other media types Signed-off-by:
Alan Cox <alan@linux.intel.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Nagalakshmi Nandigama <nagalakshmi.nandigama@lsi.com> Cc: Kashyap Desai <kashyap.desai@lsi.com> Signed-off-by:
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Fengguang Wu authored
Rationales from Eric: So I just looked a little deeper and it appears architectures that do not support atomic64_t are broken. The generic atomic64 support came in 2009 to support the perf subsystem with the expectation that all architectures would implement atomic64 support. Furthermore upon inspection of the kernel atomic64_t is used in a fair number of places beyond the performance counters: block/blk-cgroup.c drivers/acpi/apei/ drivers/block/rbd.c drivers/crypto/nx/nx.h drivers/gpu/drm/radeon/radeon.h drivers/infiniband/hw/ipath/ drivers/infiniband/hw/qib/ drivers/staging/octeon/ fs/xfs/ include/linux/perf_event.h include/net/netfilter/nf_conntrack_acct.h kernel/events/ kernel/trace/ net/mac80211/key.h net/rds/ The block control group, infiniband, xfs, crypto, 802.11, netfilter. Nothing quite so fundamental as fs/namespace.c but definitely in multiplatform-code that should work, and is already broken on those architecutres. Looking at the implementation of atomic64_add_return in lib/atomic64.c the code looks as efficient as these kinds of things get. Which leads me to the conclusion that we need atomic64 support on all architectures. Signed-off-by:
Fengguang Wu <fengguang.wu@intel.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by:
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Cyril Roelandt authored
Ensure that calls to d_find_alias() have a corresponding dput(). Signed-off-by:
Cyril Roelandt <tipecaml@gmail.com> Cc: Julia Lawall <Julia.Lawall@lip6.fr> Cc: Gilles Muller <Gilles.Muller@lip6.fr> Cc: Nicolas Palix <nicolas.palix@imag.fr> Signed-off-by:
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Alan Cox authored
The array check is useless so remove it. [akpm@linux-foundation.org: remove comment, per David] Signed-off-by:
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Cyril Roelandt authored
dput() was not called in the error path. Signed-off-by:
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Shérab authored
This makes the iris driver use the platform API, so it is properly exposed in /sys. [akpm@linux-foundation.org: remove commented-out code, add missing space to printk, clean up code layout] Signed-off-by:
Shérab <Sebastien.Hinderer@ens-lyon.org> Cc: Len Brown <lenb@kernel.org> Cc: Matthew Garrett <mjg@redhat.com> Signed-off-by:
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Corey Minyard authored
The inb/outb macros for CRIS are broken from a number of points of view, missing () around parameters and they have an unprotected if statement in them. This was breaking the compile of IPMI on CRIS and thus I was being annoyed by build regressions, so I fixed them. Plus I don't think they would have worked at all, since the data values were missing "&" and the outsl had a "3" instead of a "4" for the size. From what I can tell, this stuff is not used at all, so this can't be any more broken than it was before, anyway. Signed-off-by:
Corey Minyard <cminyard@mvista.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Cc: Mikael Starvik <starvik@axis.com> Acked-by:
Geert Uytterhoeven <geert@linux-m68k.org> Cc: <stable@vger.kernel.org> Signed-off-by:
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Jingoo Han authored
This patch fixes the checkpatch error and warning as below: WARNING: space prohibited between function name and open parenthesis '(' ERROR: trailing statements should be on next line Also, long comments are fixed for the preferred style and unnecessary lines are removed. Signed-off-by:Jingoo Han <jg1.han@samsung.com> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linuxLinus Torvalds authored
Pull SLAB changes from Pekka Enberg: "This contains preparational work from Christoph Lameter and Glauber Costa for SLAB memcg and cleanups and improvements from Ezequiel Garcia and Joonsoo Kim. Please note that the SLOB cleanup commit from Arnd Bergmann already appears in your tree but I had also merged it myself which is why it shows up in the shortlog." * 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux: mm/sl[aou]b: Common alignment code slab: Use the new create_boot_cache function to simplify bootstrap slub: Use statically allocated kmem_cache boot structure for bootstrap mm, sl[au]b: create common functions for boot slab creation slab: Simplify bootstrap slub: Use correct cpu_slab on dead cpu mm: fix slab.c kernel-doc warnings mm/slob: use min_t() to compare ARCH_SLAB_MINALIGN slab: Ignore internal flags in cache creation mm/slob: Use free_page instead of put_page for page-size kmalloc allocations mm/sl[aou]b: Move common kmem_cache_size() to slab.h mm/slob: Use object_size field in kmem_cache_size() mm/slob: Drop usage of page->private for storing page-sized allocations slub: Commonize slab_cache field in struct page sl[au]b: Process slabinfo_show in common code mm/sl[au]b: Move print_slabinfo_header to slab_common.c mm/sl[au]b: Move slabinfo processing to slab_common.c slub: remove one code path and reduce lock contention in __slab_free()
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git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespaceLinus Torvalds authored
Pull (again) user namespace infrastructure changes from Eric Biederman: "Those bugs, those darn embarrasing bugs just want don't want to get fixed. Linus I just updated my mirror of your kernel.org tree and it appears you successfully pulled everything except the last 4 commits that fix those embarrasing bugs. When you get a chance can you please repull my branch" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: userns: Fix typo in description of the limitation of userns_install userns: Add a more complete capability subset test to commit_creds userns: Require CAP_SYS_ADMIN for most uses of setns. Fix cap_capable to only allow owners in the parent user namespace to have caps.
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git://git.kernel.org/pub/scm/linux/kernel/git/lliubbo/blackfinLinus Torvalds authored
Pull blackfin update from Bob Liu. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lliubbo/blackfin: blackfin: SEC: clean up SEC interrupt initialization blackfin: kgdb: call generic_exec_single() directly blackfin: anomaly: add anomaly 16000030 for bf5xx Blackfin: dpmc: use module_platform_driver macro Blackfin: remove unused is_in_rom() Blackfin: remove unnecessary prototype for kobjsize() Blackfin: twi: Add missing __iomem annotation Blackfin: Annotate strnlen_user and strlen_user 'src' parameter with __user Blackfin: Annotate clear_user 'to' parameter with __user Blackfin: Add missing __user annotations to put_user Blackfin: Annotate strncpy_from_user src parameter with __user blackfin: Use Kbuild infrastructure for kvm_para.h UAPI: (Scripted) Disintegrate arch/blackfin/include/asm
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git://git.infradead.org/users/dhowells/linux-headersLinus Torvalds authored
Pull UAPI disintegration for Alpha from David Howells: "I've been asked to send the Alpha UAPI disintegration to you directly. The acks I have been given have been added into the patch." * tag 'disintegrate-alpha-20121217' of git://git.infradead.org/users/dhowells/linux-headers: UAPI: (Scripted) Disintegrate arch/alpha/include/asm
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git://openrisc.net/~jonas/linuxLinus Torvalds authored
Pull OpenRISC update from Jonas Bonn: "Trivial cleanups for OpenRISC." * tag 'for-3.8' of git://openrisc.net/~jonas/linux: openrisc: use kbuild.h instead of defining macros in asm-offset.c openrisc: Use Kbuild infrastructure for kvm_para.h
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git://git.kernel.org/pub/scm/linux/kernel/git/s390/linuxLinus Torvalds authored
Pull s390 update #2 from Martin Schwidefsky: "The main patch is the function measurement blocks extension for PCI to do performance statistics and help with debugging. The other patch is a small cleanup in ccwdev.h." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/ccwdev: Include asm/schid.h. s390/pci: performance statistics and debug infrastructure
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git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpcLinus Torvalds authored
Pull powerpc update from Benjamin Herrenschmidt: "The main highlight is probably some base POWER8 support. There's more to come such as transactional memory support but that will wait for the next one. Overall it's pretty quiet, or rather I've been pretty poor at picking things up from patchwork and reviewing them this time around and Kumar no better on the FSL side it seems..." * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (73 commits) powerpc+of: Rename and fix OF reconfig notifier error inject module powerpc: mpc5200: Add a3m071 board support powerpc/512x: don't compile any platform DIU code if the DIU is not enabled powerpc/mpc52xx: use module_platform_driver macro powerpc+of: Export of_reconfig_notifier_[register,unregister] powerpc/dma/raidengine: add raidengine device powerpc/iommu/fsl: Add PAMU bypass enable register to ccsr_guts struct powerpc/mpc85xx: Change spin table to cached memory powerpc/fsl-pci: Add PCI controller ATMU PM support powerpc/86xx: fsl_pcibios_fixup_bus requires CONFIG_PCI drivers/virt: the Freescale hypervisor driver doesn't need to check MSR[GS] powerpc/85xx: p1022ds: Use NULL instead of 0 for pointers powerpc: Disable relocation on exceptions when kexecing powerpc: Enable relocation on during exceptions at boot powerpc: Move get_longbusy_msecs into hvcall.h and remove duplicate function powerpc: Add wrappers to enable/disable relocation on exceptions powerpc: Add set_mode hcall powerpc: Setup relocation on exceptions for bare metal systems powerpc: Move initial mfspr LPCR out of __init_LPCR powerpc: Add relocation on exception vector handlers ...
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David Rientjes authored
With CONFIG_PARAVIRT=y and CONFIG_TRANSPARENT_HUGEPAGE=n, the build breaks because set_pmd_at() is undeclared: mm/memory.c: In function 'do_pmd_numa_page': mm/memory.c:3520: error: implicit declaration of function 'set_pmd_at' mm/mprotect.c: In function 'change_pmd_protnuma': mm/mprotect.c:120: error: implicit declaration of function 'set_pmd_at' This is because paravirt defines set_pmd_at() only when CONFIG_TRANSPARENT_HUGEPAGE=y and such a restriction is unneeded. The fix is to define it for all CONFIG_PARAVIRT configurations. Signed-off-by:
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git://git.open-osd.org/linux-open-osdLinus Torvalds authored
Pull exofs changes from Boaz Harrosh: "These are just 3 patches, the last two are bug fixes on the error paths in exofs. The important patch is the one to osd_uld which adds sysfs info to osd devices for use by user-mode clustering discovery software. I'm already sitting on this patch since before February this year, It is important for some of the big installation cluster systems, who's been compiling their own kernel just for that patch." Ugh. The osd_uld patch already went through the SCSI tree, so this was kind of pointless. But at least it has the two small error-path fixes.. * 'for-linus' of git://git.open-osd.org/linux-open-osd: exofs: don't leak io_state and pages on read error exofs: clean up the correct page collection on write error osduld: Add osdname & systemid sysfs at scsi_osd class
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git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfsLinus Torvalds authored
Pull btrfs update from Chris Mason: "A big set of fixes and features. In terms of line count, most of the code comes from Stefan, who added the ability to replace a single drive in place. This is different from how btrfs normally replaces drives, and is much much much faster. Josef is plowing through our synchronous write performance. This pull request does not include the DIO_OWN_WAITING patch that was discussed on the list, but it has a number of other improvements to cut down our latencies and CPU time during fsync/O_DIRECT writes. Miao Xie has a big series of fixes and is spreading out ordered operations over more CPUs. This improves performance and reduces contention. I've put in fixes for error handling around hash collisions. These are going back to individual stable kernels as I test against them. Otherwise we have a lot of fixes and cleanups, thanks everyone! raid5/6 is being rebased against the device replacement code. I'll have it posted this Friday along with a nice series of benchmarks." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (115 commits) Btrfs: fix a bug of per-file nocow Btrfs: fix hash overflow handling Btrfs: don't take inode delalloc mutex if we're a free space inode Btrfs: fix autodefrag and umount lockup Btrfs: fix permissions of empty files not affected by umask Btrfs: put raid properties into global table Btrfs: fix BUG() in scrub when first superblock reading gives EIO Btrfs: do not call file_update_time in aio_write Btrfs: only unlock and relock if we have to Btrfs: use tokens where we can in the tree log Btrfs: optimize leaf_space_used Btrfs: don't memset new tokens Btrfs: only clear dirty on the buffer if it is marked as dirty Btrfs: move checks in set_page_dirty under DEBUG Btrfs: log changed inodes based on the extent map tree Btrfs: add path->really_keep_locks Btrfs: do not mark ems as prealloc if we are writing to them Btrfs: keep track of the extents original block length Btrfs: inline csums if we're fsyncing Btrfs: don't bother copying if we're only logging the inode ...
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git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds authored
Pull NFS client updates from Trond Myklebust: "Features include: - Full audit of BUG_ON asserts in the NFS, SUNRPC and lockd client code. Remove altogether where possible, and replace with WARN_ON_ONCE and appropriate error returns where not. - NFSv4.1 client adds session dynamic slot table management. There is matching server side code that has been submitted to Bruce for consideration. Together, this code allows the server to dynamically manage the amount of memory it allocates to the duplicate request cache for each client. It will constantly resize those caches to reserve more memory for clients that are hot while shrinking caches for those that are quiescent. In addition, there are assorted bugfixes for the generic NFS write code, fixes to deal with the drop_nlink() warnings, and yet another fix for NFSv4 getacl." * tag 'nfs-for-3.8-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (106 commits) SUNRPC: continue run over clients list on PipeFS event instead of break NFS: Don't use SetPageError in the NFS writeback code SUNRPC: variable 'svsk' is unused in function bc_send_request SUNRPC: Handle ECONNREFUSED in xs_local_setup_socket NFSv4.1: Deal effectively with interrupted RPC calls. NFSv4.1: Move the RPC timestamp out of the slot. NFSv4.1: Try to deal with NFS4ERR_SEQ_MISORDERED. NFS: nfs_lookup_revalidate should not trust an inode with i_nlink == 0 NFS: Fix calls to drop_nlink() NFS: Ensure that we always drop inodes that have been marked as stale nfs: Remove unused list nfs4_clientid_list nfs: Remove duplicate function declaration in internal.h NFS: avoid NULL dereference in nfs_destroy_server SUNRPC handle EKEYEXPIRED in call_refreshresult SUNRPC set gss gc_expiry to full lifetime nfs: fix page dirtying in NFS DIO read codepath nfs: don't zero out the rest of the page if we hit the EOF on a DIO READ NFSv4.1: Be conservative about the client highest slotid NFSv4.1: Handle NFS4ERR_BADSLOT errors correctly nfs: don't extend writes to cover entire page if pagecache is invalid ...
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