- 03 Oct, 2017 3 commits
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Jens Axboe authored
We currently use it for find_or_create_page(), which means that it cannot fail. Ensure we also pass in 'retry == true' to alloc_page_buffers(), which also ensure that it cannot fail. After this, there are no failure cases in grow_dev_page() that occur because of a failed memory allocation. Reviewed-by:
Nikolay Borisov <nborisov@suse.com> Reviewed-by:
Jan Kara <jack@suse.cz> Signed-off-by:
Jens Axboe <axboe@kernel.dk>
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Jens Axboe authored
Instead of adding weird retry logic in that function, utilize __GFP_NOFAIL to ensure that the vm takes care of handling any potential retries appropriately. This means we don't have to call free_more_memory() from here. Reviewed-by:
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Jens Axboe authored
For some reason, the laptop mode IO completion notified was never wired up for blk-mq. Ensure that we trigger the callback appropriately, to arm the laptop mode flush timer. Reviewed-by:
Christoph Hellwig <hch@lst.de> Reviewed-by:
Bart Van Assche <Bart.VanAssche@wdc.com> Signed-off-by:
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- 01 Oct, 2017 1 commit
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Jens Axboe authored
We don't have any notion of a tagging cache anymore, and haven't for a long time. Kill off the unused enums. Signed-off-by:
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- 30 Sep, 2017 2 commits
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weiping zhang authored
since 9bddeb2a "blk-mq: make per-sw-queue bio merge as default .bio_merge" there is no caller for this function. Reviewed-by:
Ming Lei <ming.lei@redhat.com> Signed-off-by:
weiping zhang <zhangweiping@didichuxing.com> Signed-off-by:
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weiping zhang authored
add an option that disable io scheduler for null block device. Signed-off-by:
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- 26 Sep, 2017 8 commits
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Shaohua Li authored
The code is only for blkcg not for all cgroups Fixes: d4478e92 ("block/loop: make loop cgroup aware") Reported-by:
kbuild test robot <fengguang.wu@intel.com> Signed-off-by:
Shaohua Li <shli@fb.com> Signed-off-by:
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Corentin Labbe authored
This patch fix the following build warning: drivers/block/cryptoloop.c:46:8: warning: variable 'cipher' set but not used [-Wunused-but-set-variable] Signed-off-by:
Corentin Labbe <clabbe.montjoie@gmail.com> Signed-off-by:
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Shaohua Li authored
loop block device handles IO in a separate thread. The actual IO dispatched isn't cloned from the IO loop device received, so the dispatched IO loses the cgroup context. I'm ignoring buffer IO case now, which is quite complicated. Making the loop thread aware cgroup context doesn't really help. The loop device only writes to a single file. In current writeback cgroup implementation, the file can only belong to one cgroup. For direct IO case, we could workaround the issue in theory. For example, say we assign cgroup1 5M/s BW for loop device and cgroup2 10M/s. We can create a special cgroup for loop thread and assign at least 15M/s for the underlayer disk. In this way, we correctly throttle the two cgroups. But this is tricky to setup. This patch tries to address the issue. We record bio's css in loop command. When loop thread is handling the command, we then use the API provided in patch 1 to set the css for current task. The bio layer will use the css for new IO (from patch 3). Acked-by:
Tejun Heo <tj@kernel.org> Signed-off-by:
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Shaohua Li authored
bio_blkcg is the only API to get cgroup info for a bio right now. If bio_blkcg finds current task is a kthread and has original blkcg associated, it will use the css instead of associating the bio to current task. This makes it possible that kthread dispatches bios on behalf of other threads. Acked-by:
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Shaohua Li authored
Nobody uses the APIs right now. Acked-by:
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Shaohua Li authored
kthread usually runs jobs on behalf of other threads. The jobs should be charged to cgroup of original threads. But the jobs run in a kthread, where we lose the cgroup context of original threads. The patch adds a machanism to record cgroup info of original threads in kthread context. Later we can retrieve the cgroup info and attach the cgroup info to jobs. Since this mechanism is only required by kthread, we store the cgroup info in kthread data instead of generic task_struct. Acked-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds authored
Pull compat fix from Al Viro: "I really wish gcc warned about conversions from pointer to function into void *..." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: fix a typo in put_compat_shm_info()
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Al Viro authored
"uip" misspelled as "up"; unfortunately, the latter happens to be a function and gcc is happy to convert it to void *... Signed-off-by:Al Viro <viro@zeniv.linux.org.uk>
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- 25 Sep, 2017 26 commits
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git://git.kernel.dk/linux-blockLinus Torvalds authored
Pull block fixes from Jens Axboe: - Two sets of NVMe pull requests from Christoph: - Fixes for the Fibre Channel host/target to fix spec compliance - Allow a zero keep alive timeout - Make the debug printk for broken SGLs work better - Fix queue zeroing during initialization - Set of RDMA and FC fixes - Target div-by-zero fix - bsg double-free fix. - ndb unknown ioctl fix from Josef. - Buffered vs O_DIRECT page cache inconsistency fix. Has been floating around for a long time, well reviewed. From Lukas. - brd overflow fix from Mikulas. - Fix for a loop regression in this merge window, where using a union for two members of the loop_cmd turned out to be a really bad idea. From Omar. - Fix for an iostat regression fix in this series, using the wrong API to get at the block queue. From Shaohua. - Fix for a potential blktrace delection deadlock. From Waiman. * 'for-linus' of git://git.kernel.dk/linux-block: (30 commits) nvme-fcloop: fix port deletes and callbacks nvmet-fc: sync header templates with comments nvmet-fc: ensure target queue id within range. nvmet-fc: on port remove call put outside lock nvme-rdma: don't fully stop the controller in error recovery nvme-rdma: give up reconnect if state change fails nvme-core: Use nvme_wq to queue async events and fw activation nvme: fix sqhd reference when admin queue connect fails block: fix a crash caused by wrong API fs: Fix page cache inconsistency when mixing buffered and AIO DIO nvmet: implement valid sqhd values in completions nvme-fabrics: Allow 0 as KATO value nvme: allow timed-out ios to retry nvme: stop aer posting if controller state not live nvme-pci: Print invalid SGL only once nvme-pci: initialize queue memory before interrupts nvmet-fc: fix failing max io queue connections nvme-fc: use transport-specific sgl format nvme: add transport SGL definitions nvme.h: remove FC transport-specific error values ... -
Linus Torvalds authored
Merge tag 'gfs2-for-linus-4.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2 Pull gfs2 fix from Bob Peterson: "GFS2: Fix an old regression in GFS2's debugfs interface This fixes a regression introduced by commit 88ffbf3e ("GFS2: Use resizable hash table for glocks"). The regression caused the glock dump in debugfs to not report all the glocks, which makes debugging extremely difficult" * tag 'gfs2-for-linus-4.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2: gfs2: Fix debugfs glocks dump
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git://git.monstr.eu/linux-2.6-microblazeLinus Torvalds authored
Pull Microblaze fixes from Michal Simek: - Kbuild fix - use vma_pages - setup default little endians * tag 'microblaze-4.14-rc3' of git://git.monstr.eu/linux-2.6-microblaze: arch: change default endian for microblaze microblaze: Cocci spatch "vma_pages" microblaze: Add missing kvm_para.h to Kbuild
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git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-traceLinus Torvalds authored
Pull tracing fixes from Steven Rostedt: "Stack tracing and RCU has been having issues with each other and lockdep has been pointing out constant problems. The changes have been going into the stack tracer, but it has been discovered that the problem isn't with the stack tracer itself, but it is with calling save_stack_trace() from within the internals of RCU. The stack tracer is the one that can trigger the issue the easiest, but examining the problem further, it could also happen from a WARN() in the wrong place, or even if an NMI happened in this area and it did an rcu_read_lock(). The critical area is where RCU is not watching. Which can happen while going to and from idle, or bringing up or taking down a CPU. The final fix was to put the protection in kernel_text_address() as it is the one that requires RCU to be watching while doing the stack trace. To make this work properly, Paul had to allow rcu_irq_enter() happen after rcu_nmi_enter(). This should have been done anyway, since an NMI can page fault (reading vmalloc area), and a page fault triggers rcu_irq_enter(). One patch is just a consolidation of code so that the fix only needed to be done in one location" * tag 'trace-v4.14-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: tracing: Remove RCU work arounds from stack tracer extable: Enable RCU if it is not watching in kernel_text_address() extable: Consolidate *kernel_text_address() functions rcu: Allow for page faults in NMI handlers
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James Smart authored
Now that there are potentially long delays between when a remoteport or targetport delete calls is made and when the callback occurs (dev_loss_tmo timeout), no longer block in the delete routines and move the final nport puts to the callbacks. Moved the fcloop_nport_get/put/free routines to avoid forward declarations. Ensure port_info structs used in registrations are nulled in case fields are not set (ex: devloss_tmo values). Signed-off-by:
James Smart <james.smart@broadcom.com> Signed-off-by:
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James Smart authored
Comments were incorrect: - defer_rcv was in host port template. moved to target port template - Added Mandatory statements for target port template items Signed-off-by:
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James Smart authored
When searching for queue id's ensure they are within the expected range. Signed-off-by:
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James Smart authored
Avoid calling the put routine, as it may traverse to free routines while holding the target lock. Signed-off-by:
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Sagi Grimberg authored
By calling nvme_stop_ctrl on a already failed controller will wait for the scan work to complete (only by identify timeout expiration which is 60 seconds). This is unnecessary when we already know that the controller has failed. Reported-by:
Yi Zhang <yizhan@redhat.com> Signed-off-by:
Sagi Grimberg <sagi@grimberg.me> Signed-off-by:
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Sagi Grimberg authored
If we failed to transition to state LIVE after a successful reconnect, then controller deletion already started. In this case there is no point moving forward with reconnect. Reviewed-by:
Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by:
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Sagi Grimberg authored
async_event_work might race as it is executed from two different workqueues at the moment. Reviewed-by:
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James Smart authored
Fix bug in sqhd patch. It wasn't the sq that was at risk. In the case where the admin queue connect command fails, the sq->size field is not set. Therefore, this becomes a divide by zero error. Add a quick check to bypass under this failure condition. Signed-off-by:
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Andreas Gruenbacher authored
The switch to rhashtables (commit 88ffbf3e) broke the debugfs glock dump (/sys/kernel/debug/gfs2/<device>/glocks) for dumps bigger than a single buffer: the right function for restarting an rhashtable iteration from the beginning of the hash table is rhashtable_walk_enter; rhashtable_walk_stop + rhashtable_walk_start will just resume from the current position. Signed-off-by:
Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by:
Bob Peterson <rpeterso@redhat.com> Cc: stable@vger.kernel.org # v4.3+
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Shaohua Li authored
part_stat_show takes a part device not a disk, so we should use part_to_disk. Fixes: d62e26b3("block: pass in queue to inflight accounting") Cc: Bart Van Assche <bart.vanassche@wdc.com> Cc: Omar Sandoval <osandov@fb.com> Signed-off-by:
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Lukas Czerner authored
Currently when mixing buffered reads and asynchronous direct writes it is possible to end up with the situation where we have stale data in the page cache while the new data is already written to disk. This is permanent until the affected pages are flushed away. Despite the fact that mixing buffered and direct IO is ill-advised it does pose a thread for a data integrity, is unexpected and should be fixed. Fix this by deferring completion of asynchronous direct writes to a process context in the case that there are mapped pages to be found in the inode. Later before the completion in dio_complete() invalidate the pages in question. This ensures that after the completion the pages in the written area are either unmapped, or populated with up-to-date data. Also do the same for the iomap case which uses iomap_dio_complete() instead. This has a side effect of deferring the completion to a process context for every AIO DIO that happens on inode that has pages mapped. However since the consensus is that this is ill-advised practice the performance implication should not be a problem. This was based on proposal from Jeff Moyer, thanks! Reviewed-by:
Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by:
Jeff Moyer <jmoyer@redhat.com> Signed-off-by:
Lukas Czerner <lczerner@redhat.com> Signed-off-by:
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James Smart authored
To support sqhd, for initiators that are following the spec and paying attention to sqhd vs their sqtail values: - add sqhd to struct nvmet_sq - initialize sqhd to 0 in nvmet_sq_setup - rather than propagate the 0's-based qsize value from the connect message which requires a +1 in every sqhd update, and as nothing else references it, convert to 1's-based value in nvmt_sq/cq_setup() calls. - validate connect message sqsize being non-zero per spec. - updated assign sqhd for every completion that goes back. Also remove handling the NULL sq case in __nvmet_req_complete, as it can't happen with the current code. Signed-off-by:
Max Gurtovoy <maxg@mellanox.com> Signed-off-by:
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Guilherme G. Piccoli authored
Currently, driver code allows user to set 0 as KATO (Keep Alive TimeOut), but this is not being respected. This patch enforces the expected behavior. Signed-off-by:
Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com> Reviewed-by:
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James Smart authored
Currently the nvme_req_needs_retry() applies several checks to see if a retry is allowed. On of those is whether the current time has exceeded the start time of the io plus the timeout length. This check, if an io times out, means there is never a retry allowed for the io. Which means applications see the io failure. Remove this check and allow the io to timeout, like it does on other protocols, and retries to be made. On the FC transport, a frame can be lost for an individual io, and there may be no other errors that escalate for the connection/association. The io will timeout, which causes the transport to escalate into creating a new association, but the io that timed out, due to this retry logic, has already failed back to the application and things are hosed. Signed-off-by:
Keith Busch <keith.busch@intel.com> Signed-off-by:
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James Smart authored
If an nvme async_event command completes, in most cases, a new async event is posted. However, if the controller enters a resetting or reconnecting state, there is nothing to block the scheduled work element from posting the async event again. Nor are there calls from the transport to stop async events when an association dies. In the case of FC, where the association is torn down, the aer must be aborted on the FC link and completes through the normal job completion path. Thus the terminated async event ends up being rescheduled even though the controller isn't in a valid state for the aer, and the reposting gets the transport into a partially torn down data structure. It's possible to hit the scenario on rdma, although much less likely due to an aer completing right as the association is terminated and as the association teardown reclaims the blk requests via nvme_cancel_request() so its immediate, not a link-related action like on FC. Fix by putting controller state checks in both the async event completion routine where it schedules the async event and in the async event work routine before it calls into the transport. It's effectively a "stop_async_events()" behavior. The transport, when it creates a new association with the subsystem will transition the state back to live and is already restarting the async event posting. Signed-off-by:
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Keith Busch authored
The WARN_ONCE macro returns true if the condition is true, not if the warn was raised, so we're printing the scatter list every time it's invalid. This is excessive and makes debugging harder, so this patch prints it just once. Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by:
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Keith Busch authored
A spurious interrupt before the nvme driver has initialized the completion queue may inadvertently cause the driver to believe it has a completion to process. This may result in a NULL dereference since the nvmeq's tags are not set at this point. The patch initializes the host's CQ memory so that a spurious interrupt isn't mistaken for a real completion. Signed-off-by:
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James Smart authored
fc transport is treating NVMET_NR_QUEUES as maximum queue count, e.g. admin queue plus NVMET_NR_QUEUES-1 io queues. But NVMET_NR_QUEUES is the number of io queues, so maximum queue count is really NVMET_NR_QUEUES+1. Fix the handling in the target fc transport Signed-off-by:
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James Smart authored
Sync with NVM Express spec change and FC-NVME 1.18. FC transport sets SGL type to Transport SGL Data Block Descriptor and subtype to transport-specific value 0x0A. Removed the warn-on's on the PRP fields. They are unneeded. They were to check for values from the upper layer that weren't set right, and for the most part were fine. But, with Async events, which reuse the same structure and 2nd time issued the SGL overlay converted them to the Transport SGL values - the warn-on's were errantly firing. Signed-off-by:
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James Smart authored
Add transport SGL defintions from NVMe TP 4008, required for the final NVMe-FC standard. Signed-off-by:
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James Smart authored
The NVM express group recinded the reserved range for the transport. Remove the FC-centric values that had been defined. Signed-off-by:
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James Smart authored
The qla2xxx driver uses the FC-specific error when it needed to return an error to the FC-NVME transport. Convert to use a generic value instead. Signed-off-by:
Himanshu Madhani <himanshu.madhani@cavium.com> Signed-off-by:
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