- 30 Jun, 2006 40 commits
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NeilBrown authored
Just testing the i_sb isn't really enough, at least the vfsmnt must be the same. Thanks Al. Cc: Al Viro <viro@ftp.linux.org.uk> Signed-off-by:
Neil Brown <neilb@suse.de> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Doug Thompson authored
Removed Dave Peterson as per his request as co-maintainer of EDAC Thanks Dave. Added Mark Gross as maintainer of edac-e752x driver Thanks Mark Signed-off-by:
Doug Thompson <norsk5@xmission.com> Signed-off-by:
Dave Peterson <dsp@llnl.gov> Signed-off-by:
Mark Gross <mark.gross@intel.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by:
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Doug Thompson authored
- Add lower-level functions that handle various parts of the initialization done by the xxx_probe1() functions. Some of the xxx_probe1() functions are much too long and complicated (see "Chapter 5: Functions" in Documentation/CodingStyle). - Cleanup of probe1() functions in EDAC Signed-off-by:
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Doug Thompson authored
Remove add_mc_to_global_list(). In next patch, this function will be reimplemented with different semantics. 1 Reimplement add_mc_to_global_list() with semantics that allow the caller to determine the ID number for a mem_ctl_info structure. Then modify edac_mc_add_mc() so that the caller specifies the ID number for the new mem_ctl_info structure. Platform-specific code should be able to assign the ID numbers in a platform-specific manner. For instance, on Opteron it makes sense to have the ID of the mem_ctl_info structure match the ID of the node that the memory controller belongs to. 2 Modify callers of edac_mc_add_mc() so they use the new semantics. Signed-off-by:
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Doug Thompson authored
Change MC drivers from using CVS revision strings for their version number, Now each driver has its own local string. Remove some PCI dependencies from the core EDAC module. Made the code 'struct device' centric instead of 'struct pci_dev' Most of the code changes here are from a patch by Dave Jiang. It may be best to eventually move the PCI-specific code into a separate source file. Signed-off-by:
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Matt LaPlante authored
Two typos in Documentation/IPMI. Acked-by:
Alan Cox <alan@redhat.com> Signed-off-by:
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Josh Triplett authored
Add __acquire annotations to rcu_read_lock and rcu_read_lock_bh, and add __release annotations to rcu_read_unlock and rcu_read_unlock_bh. This allows sparse to detect improperly paired calls to these functions. Signed-off-by:
Josh Triplett <josh@freedesktop.org> Acked-by:
Paul E. McKenney <paulmck@us.ibm.com> Signed-off-by:
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Adrian Bunk authored
- make __cm206_init() __init (required since it calls the __init cm206_init()) - make the needlessly global bcdbin() static - remove a comment with an obsolete compile command Signed-off-by:
Adrian Bunk <bunk@stusta.de> Cc: Jens Axboe <axboe@suse.de> Signed-off-by:
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Adrian Bunk authored
Don't show a menu that can't be entered due to lack of contents on arm (the options are only available on arm26). Signed-off-by:
Ian Molton <spyro@f2s.com> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by:
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Andrew Victor authored
This corrects the comments describing the 'enabled' and 'pending' flags in struct rtc_wkalrm of include/linux/rtc.h. Signed-off-by:
Andrew Victor <andrew@sanpeople.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by:
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Andrew Morton authored
Fix a bug identified by Zou Nan hai <nanhai.zou@intel.com>: If the system is in state SYSTEM_BOOTING, and need_resched() is true, cond_resched() returns true even though it didn't reschedule. Consequently need_resched() remains true and JBD locks up. Fix that by teaching cond_resched() to only return true if it really did call schedule(). cond_resched_lock() and cond_resched_softirq() have a problem too. If we're in SYSTEM_BOOTING state and need_resched() is true, these functions will drop the lock and will then try to call schedule(), but the SYSTEM_BOOTING state will prevent schedule() from being called. So on return, need_resched() will still be true, but cond_resched_lock() has to return 1 to tell the caller that the lock was dropped. The caller will probably lock up. Bottom line: if these functions dropped the lock, they _must_ call schedule() to clear need_resched(). Make it so. Also, uninline __cond_resched(). It's largeish, and slowpath. Acked-by:
Ingo Molnar <mingo@elte.hu> Cc: <stable@kernel.org> Signed-off-by:
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Jeff Dike authored
The x86_64 build requires a definition for __raw_writeq. Signed-off-by:
Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by:
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Jeff Dike authored
I run an x86_64 kernel with i386 userspace (Ubuntu Dapper) and decided to try out UML today. I found that UML wasn't quite aware of biarch compilers (which Ubuntu i386 ships). A fix similar to what was done for x86_64 should probably be committed (see http://marc.theaimsgroup.com/?l=linux-kernel&m=113425940204010&w=2). Without the FLAGS changes, the build will fail at a number of places and without the LINK change, the final link will fail. Signed-off-by:
Nishanth Aravamudan <nacc@us.ibm.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by:
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Jeff Dike authored
Forgot to remove arch/um/kernel/time.c when it was mostly moved to arch/um/os-Linux. Signed-off-by:
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Jeff Dike authored
Remove um_time() and um_stime() syscalls since they are identical to system-wide ones. Signed-off-by:
Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by:
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Jeff Dike authored
do_timer must be called with xtime_lock held. I'm not sure boot_timer_handler needs this, however I don't think it hurts: it simply disables irq and takes a spinlock. Signed-off-by:
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Jeff Dike authored
-mm in combination with an FC5 init started dying with 'stderr=1' because init didn't like the lack of /dev/console and exited. The problem was that the stderr console, which is intended to dump printk output to the terminal before the regular console is initialized, isn't a tty, and so can't make /dev/console operational. However, since it is registered first, the normal console, when it is registered, doesn't become the preferred console, and isn't attached to /dev/console. Thus, /dev/console is never operational. This patch makes the stderr console unregister itself in an initcall, which is late enough that the normal console is registered. When that happens, the normal console will become the preferred console and will be able to run /dev/console. Signed-off-by:
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Jeff Dike authored
Fix an off-by-one bug in temp file creation. Seeking to the desired length and writing a byte resulted in the file being one byte longer than expected. Signed-off-by:
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Jeff Dike authored
When parsing /proc/mounts looking for a tmpfs mount on /dev/shm, if a string that we are looking for if split across reads, then it won't be recognized. Fix this by refilling the buffer whenever we advance the cursor. Signed-off-by:
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Adrian Bunk authored
Fix the INIT_ENV_ARG_LIMIT dependencies to what seems to have been intended. Spotted by Jean-Luc Leger. Signed-off-by:
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Andrew Morton authored
Presently, smp_processor_id() isn't necessarily set up until setup_arch(). But it's used in boot_cpu_init() and printk() and perhaps in other places, prior to setup_arch() being called. So provide a new smp_setup_processor_id() which is called before anything else, wire it up for Voyager (which boots on a CPU other than #0, and broke). Cc: James Bottomley <James.Bottomley@steeleye.com> Signed-off-by:
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David Quigley authored
Add a new security hook definition for the sys_ioprio_get operation. At present, the SELinux hook function implementation for this hook is identical to the getscheduler implementation but a separate hook is introduced to allow this check to be specialized in the future if necessary. This patch also creates a helper function get_task_ioprio which handles the access check in addition to retrieving the ioprio value for the task. Signed-off-by:
David Quigley <dpquigl@tycho.nsa.gov> Acked-by:
Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by:
James Morris <jmorris@namei.org> Cc: Jens Axboe <axboe@suse.de> Signed-off-by:
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David Quigley authored
This patch updates the USB core to save and pass the sending task secid when sending signals upon AIO completion so that proper security checking can be applied by security modules. Signed-off-by:
Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by:
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David Quigley authored
This patch adds a call to the extended security_task_kill hook introduced by the prior patch to the kill_proc_info_as_uid function so that these signals can be properly mediated by security modules. It also updates the existing hook call in check_kill_permission. Signed-off-by:
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David Quigley authored
This patch extends the security_task_kill hook to handle signals sent by AIO completion. In this case, the secid of the task responsible for the signal needs to be obtained and saved earlier, so a security_task_getsecid() hook is added, and then this saved value is passed subsequently to the extended task_kill hook for use in checking. Signed-off-by:
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Christoph Lameter authored
Post and discussion: http://marc.theaimsgroup.com/?t=115074342800003&r=1&w=2 Code in __shrink_node() duplicates code in cache_reap() Add a new function drain_freelist that removes slabs with objects that are already free and use that in various places. This eliminates the __node_shrink() function and provides the interrupt holdoff reduction from slab_free to code that used to call __node_shrink. [akpm@osdl.org: build fixes] Signed-off-by:
Christoph Lameter <clameter@sgi.com> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by:
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Christoph Lameter authored
The remaining counters in page_state after the zoned VM counter patches have been applied are all just for show in /proc/vmstat. They have no essential function for the VM. We use a simple increment of per cpu variables. In order to avoid the most severe races we disable preempt. Preempt does not prevent the race between an increment and an interrupt handler incrementing the same statistics counter. However, that race is exceedingly rare, we may only loose one increment or so and there is no requirement (at least not in kernel) that the vm event counters have to be accurate. In the non preempt case this results in a simple increment for each counter. For many architectures this will be reduced by the compiler to a single instruction. This single instruction is atomic for i386 and x86_64. And therefore even the rare race condition in an interrupt is avoided for both architectures in most cases. The patchset also adds an off switch for embedded systems that allows a building of linux kernels without these counters. The implementation of these counters is through inline code that hopefully results in only a single instruction increment instruction being emitted (i386, x86_64) or in the increment being hidden though instruction concurrency (EPIC architectures such as ia64 can get that done). Benefits: - VM event counter operations usually reduce to a single inline instruction on i386 and x86_64. - No interrupt disable, only preempt disable for the preempt case. Preempt disable can also be avoided by moving the counter into a spinlock. - Handling is similar to zoned VM counters. - Simple and easily extendable. - Can be omitted to reduce memory use for embedded use. References: RFC http://marc.theaimsgroup.com/?l=linux-kernel&m=113512330605497&w=2 RFC http://marc.theaimsgroup.com/?l=linux-kernel&m=114988082814934&w=2 local_t http://marc.theaimsgroup.com/?l=linux-kernel&m=114991748606690&w=2 V2 http://marc.theaimsgroup.com/?t=115014808400007&r=1&w=2 V3 http://marc.theaimsgroup.com/?l=linux-kernel&m=115024767022346&w=2 V4 http://marc.theaimsgroup.com/?l=linux-kernel&m=115047968808926&w=2Signed-off-by:
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Christoph Lameter authored
The numa statistics are really event counters. But they are per node and so we have had special treatment for these counters through additional fields on the pcp structure. We can now use the per zone nature of the zoned VM counters to realize these. This will shrink the size of the pcp structure on NUMA systems. We will have some room to add additional per zone counters that will all still fit in the same cacheline. Bits Prior pcp size Size after patch We can add ------------------------------------------------------------------ 64 128 bytes (16 words) 80 bytes (10 words) 48 32 76 bytes (19 words) 56 bytes (14 words) 8 (64 byte cacheline) 72 (128 byte) Remove the special statistics for numa and replace them with zoned vm counters. This has the side effect that global sums of these events now show up in /proc/vmstat. Also take the opportunity to move the zone_statistics() function from page_alloc.c into vmstat.c. Discussions: V2 http://marc.theaimsgroup.com/?t=115048227000002&r=1&w=2Signed-off-by:
Andi Kleen <ak@suse.de> Signed-off-by:
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Andrew Morton authored
No callers. Cc: Christoph Lameter <clameter@engr.sgi.com> Signed-off-by:
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Christoph Lameter authored
Remove writeback state We can remove some functions now that were needed to calculate the page state for writeback control since these statistics are now directly available. Signed-off-by:
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Christoph Lameter authored
Conversion of nr_bounce to a per zone counter nr_bounce is only used for proc output. So it could be left as an event counter. However, the event counters may not be accurate and nr_bounce is categorizing types of pages in a zone. So we really need this to also be a per zone counter. [akpm@osdl.org: bugfix] Signed-off-by:
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Christoph Lameter authored
Conversion of nr_unstable to a per zone counter We need to do some special modifications to the nfs code since there are multiple cases of disposition and we need to have a page ref for proper accounting. This converts the last critical page state of the VM and therefore we need to remove several functions that were depending on GET_PAGE_STATE_LAST in order to make the kernel compile again. We are only left with event type counters in page state. [akpm@osdl.org: bugfixes] Signed-off-by:
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Christoph Lameter authored
Conversion of nr_writeback to per zone counter. This removes the last page_state counter from arch/i386/mm/pgtable.c so we drop the page_state from there. [akpm@osdl.org: bugfix] Signed-off-by:
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Christoph Lameter authored
This makes nr_dirty a per zone counter. Looping over all processors is avoided during writeback state determination. The counter aggregation for nr_dirty had to be undone in the NFS layer since we summed up the page counts from multiple zones. Someone more familiar with NFS should probably review what I have done. [akpm@osdl.org: bugfix] Signed-off-by:
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Christoph Lameter authored
Conversion of nr_page_table_pages to a per zone counter [akpm@osdl.org: bugfix] Signed-off-by:
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Christoph Lameter authored
- Allows reclaim to access counter without looping over processor counts. - Allows accurate statistics on how many pages are used in a zone by the slab. This may become useful to balance slab allocations over various zones. [akpm@osdl.org: bugfix] Signed-off-by:
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Christoph Lameter authored
The zone_reclaim_interval was necessary because we were not able to determine how many unmapped pages exist in a zone. Therefore we had to scan in intervals to figure out if any pages were unmapped. With the zoned counters and NR_ANON_PAGES we now know the number of pagecache pages and the number of mapped pages in a zone. So we can simply skip the reclaim if there is an insufficient number of unmapped pages. We use SWAP_CLUSTER_MAX as the boundary. Drop all support for /proc/sys/vm/zone_reclaim_interval. Signed-off-by:
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Christoph Lameter authored
The current NR_FILE_MAPPED is used by zone reclaim and the dirty load calculation as the number of mapped pagecache pages. However, that is not true. NR_FILE_MAPPED includes the mapped anonymous pages. This patch separates those and therefore allows an accurate tracking of the anonymous pages per zone. It then becomes possible to determine the number of unmapped pages per zone and we can avoid scanning for unmapped pages if there are none. Also it may now be possible to determine the mapped/unmapped ratio in get_dirty_limit. Isnt the number of anonymous pages irrelevant in that calculation? Note that this will change the meaning of the number of mapped pages reported in /proc/vmstat /proc/meminfo and in the per node statistics. This may affect user space tools that monitor these counters! NR_FILE_MAPPED works like NR_FILE_DIRTY. It is only valid for pagecache pages. Signed-off-by:
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Christoph Lameter authored
We can now access the number of pages in a mapped state in an inexpensive way in shrink_active_list. So drop the nr_mapped field from scan_control. [akpm@osdl.org: bugfix] Signed-off-by:
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Christoph Lameter authored
Currently a single atomic variable is used to establish the size of the page cache in the whole machine. The zoned VM counters have the same method of implementation as the nr_pagecache code but also allow the determination of the pagecache size per zone. Remove the special implementation for nr_pagecache and make it a zoned counter named NR_FILE_PAGES. Updates of the page cache counters are always performed with interrupts off. We can therefore use the __ variant here. Signed-off-by:
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