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2021-10-18block: add a bdev_nr_bytes helperChristoph Hellwig1-1/+6
Add a helper to query the size of a block device in bytes. This will be used to remove open coded access to ->bd_inode. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20211018101130.1838532-3-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: move the SECTOR_SIZE related definitions to blk_types.hChristoph Hellwig2-17/+17
Ensure these are always available for inlines in the various block layer headers. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Link: https://lore.kernel.org/r/20211018101130.1838532-2-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: add support for blk_mq_end_request_batch()Jens Axboe1-0/+29
Instead of calling blk_mq_end_request() on a single request, add a helper that takes the new struct io_comp_batch and completes any request stored in there. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18sbitmap: add helper to clear a batch of tagsJens Axboe1-0/+11
sbitmap currently only supports clearing tags one-by-one, add a helper that allows the caller to pass in an array of tags to clear. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: add a struct io_comp_batch argument to fops->iopoll()Jens Axboe3-4/+15
struct io_comp_batch contains a list head and a completion handler, which will allow completions to more effciently completed batches of IO. For now, no functional changes in this patch, we just define the io_comp_batch structure and add the argument to the file_operations iopoll handler. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: provide helpers for rq_list manipulationJens Axboe1-0/+29
Instead of open-coding the list additions, traversal, and removal, provide a basic set of helpers. Suggested-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: remove some blk_mq_hw_ctx debugfs entriesJens Axboe1-10/+0
Just like the blk_mq_ctx counterparts, we've got a bunch of counters in here that are only for debugfs and are of questionnable value. They are: - dispatched, index of how many requests were dispatched in one go - poll_{considered,invoked,success}, which track poll sucess rates. We're confident in the iopoll implementation at this point, don't bother tracking these. As a bonus, this shrinks each hardware queue from 576 bytes to 512 bytes, dropping a whole cacheline. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: store elevator state in requestJens Axboe1-0/+2
Add an rq private RQF_ELV flag, which tells the block layer that this request was initialized on a queue that has an IO scheduler attached. This allows for faster checking in the fast path, rather than having to deference rq->q later on. Elevator switching does full quiesce of the queue before detaching an IO scheduler, so it's safe to cache this in the request itself. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: improve layout of struct requestJens Axboe1-44/+46
It's been a while since this was analyzed, move some members around to better flow with the use case. Initial state up top, and queued state after that. This improves my peak case by about 1.5%, from 7750K to 7900K IOPS. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: don't bother iter advancing a fully done bioJens Axboe1-2/+22
If we're completing nbytes and nbytes is the size of the bio, don't bother with calling into the iterator increment helpers. Just clear the bio size and we're done. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: cache request queue in bdevPavel Begunkov2-1/+2
There are tons of places where we need to get a request_queue only having bdev, which turns into bdev->bd_disk->queue. There are probably a hundred of such places considering inline helpers, and enough of them are in hot paths. Cache queue pointer in struct block_device and make use of it in bdev_get_queue(). Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/a3bfaecdd28956f03629d0ca5c63ebc096e1c809.1634219547.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: switch polling to be bio basedChristoph Hellwig6-32/+16
Replace the blk_poll interface that requires the caller to keep a queue and cookie from the submissions with polling based on the bio. Polling for the bio itself leads to a few advantages: - the cookie construction can made entirely private in blk-mq.c - the caller does not need to remember the request_queue and cookie separately and thus sidesteps their lifetime issues - keeping the device and the cookie inside the bio allows to trivially support polling BIOs remapping by stacking drivers - a lot of code to propagate the cookie back up the submission path can be removed entirely. Signed-off-by: Christoph Hellwig <hch@lst.de> Tested-by: Mark Wunderlich <mark.wunderlich@intel.com> Link: https://lore.kernel.org/r/20211012111226.760968-15-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: define 'struct bvec_iter' as packedMing Lei1-1/+1
'struct bvec_iter' is embedded into 'struct bio', define it as packed so that we can get one extra 4bytes for other uses without expanding bio. 'struct bvec_iter' is often allocated on stack, so making it packed doesn't affect performance. Also I have run io_uring on both nvme/null_blk, and not observe performance effect in this way. Suggested-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de> Tested-by: Mark Wunderlich <mark.wunderlich@intel.com> Link: https://lore.kernel.org/r/20211012111226.760968-14-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: rename REQ_HIPRI to REQ_POLLEDChristoph Hellwig2-3/+3
Unlike the RWF_HIPRI userspace ABI which is intentionally kept vague, the bio flag is specific to the polling implementation, so rename and document it properly. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Tested-by: Mark Wunderlich <mark.wunderlich@intel.com> Link: https://lore.kernel.org/r/20211012111226.760968-12-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18io_uring: don't sleep when polling for I/OChristoph Hellwig1-0/+2
There is no point in sleeping for the expected I/O completion timeout in the io_uring async polling model as we never poll for a specific I/O. Signed-off-by: Christoph Hellwig <hch@lst.de> Tested-by: Mark Wunderlich <mark.wunderlich@intel.com> Link: https://lore.kernel.org/r/20211012111226.760968-11-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: replace the spin argument to blk_iopoll with a flags argumentChristoph Hellwig3-3/+5
Switch the boolean spin argument to blk_poll to passing a set of flags instead. This will allow to control polling behavior in a more fine grained way. Signed-off-by: Christoph Hellwig <hch@lst.de> Tested-by: Mark Wunderlich <mark.wunderlich@intel.com> Link: https://lore.kernel.org/r/20211012111226.760968-10-hch@lst.de [axboe: adapt to changed io_uring iopoll] Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18blk-mq: remove blk_qc_t_validChristoph Hellwig1-5/+0
Move the trivial check into the only caller. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Tested-by: Mark Wunderlich <mark.wunderlich@intel.com> Link: https://lore.kernel.org/r/20211012111226.760968-9-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18blk-mq: remove blk_qc_t_to_tag and blk_qc_t_is_internalChristoph Hellwig1-10/+0
Merge both functions into their only caller to keep the blk-mq tag to blk_qc_t mapping as private as possible in blk-mq.c. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Tested-by: Mark Wunderlich <mark.wunderlich@intel.com> Link: https://lore.kernel.org/r/20211012111226.760968-8-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18blk-mq: factor out a blk_qc_to_hctx helperChristoph Hellwig1-5/+0
Add a helper to get the hctx from a request_queue and cookie, and fold the blk_qc_t_to_queue_num helper into it as no other callers are left. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Tested-by: Mark Wunderlich <mark.wunderlich@intel.com> Link: https://lore.kernel.org/r/20211012111226.760968-6-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18sbitmap: add __sbitmap_queue_get_batch()Jens Axboe1-0/+13
The block layer tag allocation batching still calls into sbitmap to get each tag, but we can improve on that. Add __sbitmap_queue_get_batch(), which returns a mask of tags all at once, along with an offset for those tags. An example return would be 0xff, where bits 0..7 are set, with tag_offset == 128. The valid tags in this case would be 128..135. A batch is specific to an individual sbitmap_map, hence it cannot be larger than that. The requested number of tags is automatically reduced to the max that can be satisfied with a single map. On failure, 0 is returned. Caller should fall back to single tag allocation at that point/ Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: mark bio_truncate staticChristoph Hellwig1-1/+0
bio_truncate is only used in bio.c, so mark it static. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211012161804.991559-9-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: move bio_get_{first,last}_bvec out of bio.hChristoph Hellwig1-31/+0
bio_get_first_bvec and bio_get_last_bvec are only used in blk-merge.c, so move them there. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211012161804.991559-8-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: mark __bio_try_merge_page staticChristoph Hellwig1-2/+0
Mark __bio_try_merge_page static and move it up a bit to avoid the need for a forward declaration. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211012161804.991559-7-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: move bio_full out of bio.hChristoph Hellwig1-19/+0
bio_full is only used in bio.c, so move it there. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211012161804.991559-6-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: fold bio_cur_bytes into blk_rq_cur_bytesChristoph Hellwig2-9/+5
Fold bio_cur_bytes into the only caller. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211012161804.991559-5-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: move bio_mergeable out of bio.hChristoph Hellwig1-8/+0
bio_mergeable is only needed by I/O schedulers, so move it to blk-mq-sched.h. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211012161804.991559-4-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: don't include <linux/ioprio.h> in <linux/bio.h>Christoph Hellwig1-1/+0
bio.h doesn't need any of the definitions from ioprio.h. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211012161804.991559-3-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: remove BIO_BUG_ONChristoph Hellwig1-8/+0
BIO_DEBUG is always defined, so just switch the two instances to use BUG_ON directly. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211012161804.991559-2-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: move the *blkdev_ioctl declarations out of blkdev.hChristoph Hellwig1-4/+0
These are only used inside of block/. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211012104450.659013-3-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: pre-allocate requests if plug is started and is a batchJens Axboe2-2/+18
The caller typically has a good (or even exact) idea of how many requests it needs to submit. We can make the request/tag allocation a lot more efficient if we just allocate N requests/tags upfront when we queue the first bio from the batch. Provide a new plug start helper that allows the caller to specify how many IOs are expected. This sets plug->nr_ios, and we can use that for smarter request allocation. The plug provides a holding spot for requests, and request allocation will check it before calling into the normal request allocation path. The blk_finish_plug() is called, check if there are unused requests and free them. This should not happen in normal operations. The exception is if we get merging, then we may be left with requests that need freeing when done. This raises the per-core performance on my setup from ~5.8M to ~6.1M IOPS. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: bump max plugged deferred size from 16 to 32Jens Axboe1-2/+0
Particularly for NVMe with efficient deferred submission for many requests, there are nice benefits to be seen by bumping the default max plug count from 16 to 32. This is especially true for virtualized setups, where the submit part is more expensive. But can be noticed even on native hardware. Reduce the multiple queue factor from 4 to 2, since we're changing the default size. While changing it, move the defines into the block layer private header. These aren't values that anyone outside of the block layer uses, or should use. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18blk-mq: Change shared sbitmap naming to shared tagsJohn Garry2-6/+6
Now that shared sbitmap support really means shared tags, rename symbols to match that. Signed-off-by: John Garry <john.garry@huawei.com> Link: https://lore.kernel.org/r/1633429419-228500-15-git-send-email-john.garry@huawei.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18blk-mq: Use shared tags for shared sbitmap supportJohn Garry2-10/+8
Currently we use separate sbitmap pairs and active_queues atomic_t for shared sbitmap support. However a full sets of static requests are used per HW queue, which is quite wasteful, considering that the total number of requests usable at any given time across all HW queues is limited by the shared sbitmap depth. As such, it is considerably more memory efficient in the case of shared sbitmap to allocate a set of static rqs per tag set or request queue, and not per HW queue. So replace the sbitmap pairs and active_queues atomic_t with a shared tags per tagset and request queue, which will hold a set of shared static rqs. Since there is now no valid HW queue index to be passed to the blk_mq_ops .init and .exit_request callbacks, pass an invalid index token. This changes the semantics of the APIs, such that the callback would need to validate the HW queue index before using it. Currently no user of shared sbitmap actually uses the HW queue index (as would be expected). Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/1633429419-228500-13-git-send-email-john.garry@huawei.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: Rename BLKDEV_MAX_RQ -> BLKDEV_DEFAULT_RQJohn Garry1-1/+1
It is a bit confusing that there is BLKDEV_MAX_RQ and MAX_SCHED_RQ, as the name BLKDEV_MAX_RQ would imply the max requests always, which it is not. Rename to BLKDEV_MAX_RQ to BLKDEV_DEFAULT_RQ, matching its usage - that being the default number of requests assigned when allocating a request queue. Signed-off-by: John Garry <john.garry@huawei.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Link: https://lore.kernel.org/r/1633429419-228500-3-git-send-email-john.garry@huawei.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: move struct request to blk-mq.hChristoph Hellwig6-473/+469
struct request is only used by blk-mq drivers, so move it and all related declarations to blk-mq.h. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20210920123328.1399408-18-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: move integrity handling out of <linux/blkdev.h>Christoph Hellwig2-183/+183
Split the integrity/metadata handling definitions out into a new header. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20210920123328.1399408-17-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: move a few merge helpers out of <linux/blkdev.h>Christoph Hellwig1-64/+0
These are block-layer internal helpers, so move them to block/blk.h and block/blk-merge.c. Also update a comment a bit to use better grammar. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20210920123328.1399408-16-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: drop unused includes in <linux/genhd.h>Christoph Hellwig2-12/+3
Drop various include not actually used in genhd.h itself, and move the remaning includes closer together. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20210920123328.1399408-15-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: drop unused includes in <linux/blkdev.h>Christoph Hellwig1-7/+0
Drop various include not actually used in blkdev.h itself. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20210920123328.1399408-14-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: move elevator.h to block/Christoph Hellwig2-182/+9
Except for the features passed to blk_queue_required_elevator_features, elevator.h is only needed internally to the block layer. Move the ELEVATOR_F_* definitions to blkdev.h, and the move elevator.h to block/, dropping all the spurious includes outside of that. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20210920123328.1399408-13-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: remove the struct blk_queue_ctx forward declarationChristoph Hellwig1-2/+0
This type doesn't exist at all, so no need to forward declare it. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20210920123328.1399408-12-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: remove the cmd_size field from struct request_queueChristoph Hellwig1-2/+0
Entirely unused. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20210920123328.1399408-11-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: remove the unused blk_queue_state enumChristoph Hellwig1-5/+0
Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20210920123328.1399408-10-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18block: remove the unused rq_end_sector macroChristoph Hellwig1-1/+0
Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20210920123328.1399408-9-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18mm: don't include <linux/blkdev.h> in <linux/backing-dev.h>Christoph Hellwig1-15/+1
Move inode_to_bdi out of line to avoid having to include blkdev.h. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20210920123328.1399408-4-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18mm: don't include <linux/blk-cgroup.h> in <linux/backing-dev.h>Christoph Hellwig1-1/+2
There is no need to pull blk-cgroup.h and thus blkdev.h in here, so break the include chain. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20210920123328.1399408-3-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18mm: don't include <linux/blk-cgroup.h> in <linux/writeback.h>Christoph Hellwig1-9/+5
blk-cgroup.h pulls in blkdev.h and thus pretty much all the block headers. Break this dependency chain by turning wbc_blkcg_css into a macro and dropping the blk-cgroup.h include. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20210920123328.1399408-2-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18Merge tag 'block-5.15-2021-10-17' of git://git.kernel.dk/linux-blockLinus Torvalds2-10/+10
Pull block fixes from Jens Axboe: "Bigger than usual for this point in time, the majority is fixing some issues around BDI lifetimes with the move from the request_queue to the disk in this release. In detail: - Series on draining fs IO for del_gendisk() (Christoph) - NVMe pull request via Christoph: - fix the abort command id (Keith Busch) - nvme: fix per-namespace chardev deletion (Adam Manzanares) - brd locking scope fix (Tetsuo) - BFQ fix (Paolo)" * tag 'block-5.15-2021-10-17' of git://git.kernel.dk/linux-block: block, bfq: reset last_bfqq_created on group change block: warn when putting the final reference on a registered disk brd: reduce the brd_devices_mutex scope kyber: avoid q->disk dereferences in trace points block: keep q_usage_counter in atomic mode after del_gendisk block: drain file system I/O on del_gendisk block: split bio_queue_enter from blk_queue_enter block: factor out a blk_try_enter_queue helper block: call submit_bio_checks under q_usage_counter nvme: fix per-namespace chardev deletion block/rnbd-clt-sysfs: fix a couple uninitialized variable bugs nvme-pci: Fix abort command id
2021-10-18Merge tag 'char-misc-5.15-rc6' of ↵Linus Torvalds1-4/+2
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char/misc driver fixes from Greg KH: "Here are some small char/misc driver fixes for 5.15-rc6 for reported issues that include: - habanalabs driver fixes - mei driver fixes and new ids - fpga new device ids - MAINTAINER file updates for fpga subsystem - spi module id table additions and fixes - fastrpc locking fixes - nvmem driver fix All of these have been in linux-next for a while with no reported issues" * tag 'char-misc-5.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: eeprom: 93xx46: fix MODULE_DEVICE_TABLE nvmem: Fix shift-out-of-bound (UBSAN) with byte size cells mei: hbm: drop hbm responses on early shutdown mei: me: add Ice Lake-N device id. eeprom: 93xx46: Add SPI device ID table eeprom: at25: Add SPI ID table misc: HI6421V600_IRQ should depend on HAS_IOMEM misc: fastrpc: Add missing lock before accessing find_vma() cb710: avoid NULL pointer subtraction misc: gehc: Add SPI ID table MAINTAINERS: Drop outdated FPGA Manager website MAINTAINERS: Add Hao and Yilun as maintainers habanalabs: fix resetting args in wait for CS IOCTL fpga: ice40-spi: Add SPI device ID table
2021-10-16kyber: avoid q->disk dereferences in trace pointsChristoph Hellwig1-10/+9
q->disk becomes invalid after the gendisk is removed. Work around this by caching the dev_t for the tracepoints. The real fix would be to properly tear down the I/O schedulers with the gendisk, but that is a much more invasive change. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211012093301.GA27795@lst.de Tested-by: Yi Zhang <yi.zhang@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
generated by cgit v1.2.3 (git 2.39.0) at 2024-09-16 12:57:20 +0300