- 30 11月, 2016 3 次提交
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由 Javier González 提交于
Erases might be subject to host hints. An example is multi-plane programming to erase blocks in parallel. Enable targets to specify this hint. Signed-off-by: NJavier González <javier@cnexlabs.com> Signed-off-by: NMatias Bjørling <m@bjorling.me> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Matias Bjørling 提交于
Previously, LBA read and write were not supported in the lightnvm specification. Now that it supports it, lets use the traditional NVMe gendisk, and attach the lightnvm sysfs geometry export. Signed-off-by: NMatias Bjørling <m@bjorling.me> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Matias Bjørling 提交于
When struct nvme_request was introduced, the nvme_nvm_submit_io was converted to the new interface. The interface moves nvme_nvm_command data structure into the struct request pdu. On io completion, rq->cmd is freed, which should have been the dereferenced pdu nvme_request->cmd. Fixes: d49187e9 "nvme: introduce struct nvme_request" Signed-off-by: NMatias Bjørling <m@bjorling.me> Signed-off-by: NJens Axboe <axboe@fb.com>
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- 29 11月, 2016 4 次提交
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由 Gabriel Krisman Bertazi 提交于
After commit 287922eb ("block: defer timeouts to a workqueue"), deleting the timeout work after freezing the queue shouldn't be necessary, since the synchronization is already enforced by the acquisition of a q_usage_counter reference in blk_mq_timeout_work. Signed-off-by: NGabriel Krisman Bertazi <krisman@linux.vnet.ibm.com> Reviewed-by: NMing Lei <ming.lei@canonical.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Jens Axboe 提交于
Currently there's no way to enable wbt if it's not enabled in the kernel config by default for a device. Allow a write to the 'wbt_lat_usec' queue sysfs file to enable wbt. This is useful for both the kernel config case, but also if the device is CFQ managed and it was turned off by default. Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Jens Axboe 提交于
Make it clear that we are disabling wbt for the specified queued, if it was enabled by default. This is in preparation for allowing users to re-enable wbt, and not have it disabled automatically again. Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Jens Axboe 提交于
Allow a write of '-1' to reset the default latency target for a given device. This removes knowledge of the different default settings for rotational vs non-rotational from user space. Signed-off-by: NJens Axboe <axboe@fb.com>
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- 23 11月, 2016 3 次提交
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由 Jens Axboe 提交于
Multiple paths don't set it properly, ensure that we do. Fixes: 9561a7ad ("nbd: add multi-connection support") Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Jens Axboe 提交于
Bit #7 is already used, move to bit #8 which is the first unused one. Fixes: 9561a7ad ("nbd: add multi-connection support") Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Josef Bacik 提交于
NBD can become contended on its single connection. We have to serialize all writes and we can only process one read response at a time. Fix this by allowing userspace to provide multiple connections to a single nbd device. This coupled with block-mq drastically increases performance in multi-process cases. Thanks, Signed-off-by: NJosef Bacik <jbacik@fb.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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- 22 11月, 2016 15 次提交
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由 Tejun Heo 提交于
blkcg allocates some per-cgroup data structures with GFP_NOWAIT and when that fails falls back to operations which aren't specific to the cgroup. Occassional failures are expected under pressure and falling back to non-cgroup operation is the right thing to do. Unfortunately, I forgot to add __GFP_NOWARN to these allocations and these expected failures end up creating a lot of noise. Add __GFP_NOWARN. Signed-off-by: NTejun Heo <tj@kernel.org> Reported-by: NMarc MERLIN <marc@merlins.org> Reported-by: NVlastimil Babka <vbabka@suse.cz> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Ming Lei 提交于
The check on bio->bi_vcnt doesn't make sense in erase_end_io(). Reviewed-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NMing Lei <tom.leiming@gmail.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Ming Lei 提交于
Also code gets simplified a bit. Reviewed-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NMing Lei <tom.leiming@gmail.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Ming Lei 提交于
Also this patch simplify the code a bit. Reviewed-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NMing Lei <tom.leiming@gmail.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Ming Lei 提交于
Always bio_add_page() is the standard and preferred way to do the task. Reviewed-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NMing Lei <tom.leiming@gmail.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Ming Lei 提交于
Instead we use standard iterator way to do that. Signed-off-by: NMing Lei <tom.leiming@gmail.com> Reviewed-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Ming Lei 提交于
When the bio is full, bio_add_pc_page() will return zero, so use this information tell when the bio is full. Also replace access to .bi_vcnt for pr_debug() with bio_segments(). Reviewed-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NMing Lei <tom.leiming@gmail.com> Reviewed-by: NSagi Grimberg <sagi@grimberg.me> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Ming Lei 提交于
Signed-off-by: NMing Lei <tom.leiming@gmail.com> Reviewed-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Ming Lei 提交于
For a non-cloned bio, bio_add_page() only returns failure when the io vec table is full, but in that case, bio->bi_vcnt can't be zero at all. So remove the impossible failure handling. Reviewed-by: NChristoph Hellwig <hch@lst.de> Acked-by: NLars Ellenberg <lars.ellenberg@linbit.com> Signed-off-by: NMing Lei <tom.leiming@gmail.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Ming Lei 提交于
Some drivers often use external bvec table, so introduce this helper for this case. It is always safe to access the bio->bi_io_vec in this way for this case. After converting to this usage, it will becomes a bit easier to evaluate the remaining direct access to bio->bi_io_vec, so it can help to prepare for the following multipage bvec support. Signed-off-by: NMing Lei <tom.leiming@gmail.com> Reviewed-by: NChristoph Hellwig <hch@lst.de> Fixed up the new O_DIRECT cases. Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Jens Axboe 提交于
We store the bits in the bdev sector size locally, but we don't use the calculation anymore. All we do with it is shift it back up to the bdev sector size. So let's just use that directly and kill the variable and bits calculation. Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Damien Le Moal 提交于
A direct I/O alignment must be always checked against the device blocks size, but the I/O offset (bio->bi_iter.bi_sector must always use 512B sector unit, and not the actual logical block size. Signed-off-by: NDamien Le Moal <damien.lemoal@wdc.com> Reviewed-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Shaun Tancheff 提交于
If a ZBC device is partitioned and operations are performed on the partition the zone information is rebased to the partition, however the zone reset is not mapped from the partition to device as are other operations. This causes the API (report zones / reset zone) to be unbalanced in this regard. Checking for the zone reset op code explicitly will balance the API. Signed-off-by: NShaun Tancheff <shaun.tancheff@seagate.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Christoph Hellwig 提交于
Since commit 87374179 ("block: add a proper block layer data direction encoding") we only or the new op and flags into bi_opf in bio_set_op_attrs instead of clearing the old value. I've not seen any breakage with the new behavior, but it seems dangerous. Also convert it to an inline function to make the argument passing safer. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Jens Axboe 提交于
This driver is both orphaned, and not really useful anymore. Mark it as such, and remove it in a future kernel after a release or two. Signed-off-by: NJens Axboe <axboe@fb.com>
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- 18 11月, 2016 10 次提交
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由 Tobias Klauser 提交于
With compilers which follow the C99 standard (like modern versions of gcc and clang), "extern inline" does the opposite thing from older versions of gcc (emits code for an externally linkable version of the inline function). "static inline" does the intended behavior in all cases instead. Description taken from commit 6d91857d ("staging, rtl8192e, LLVMLinux: Change extern inline to static inline"). This also fixes the following GCC warning when building with CONFIG_PM disabled: ./include/linux/blkdev.h:1143:20: warning: no previous prototype for 'blk_set_runtime_active' [-Wmissing-prototypes] Fixes: d07ab6d1 ("block: Add blk_set_runtime_active()") Reviewed-by: NMika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: NTobias Klauser <tklauser@distanz.ch> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Geliang Tang 提交于
Drop duplicate header scatterlist.h from skd_main.c. Signed-off-by: NGeliang Tang <geliangtang@gmail.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Jens Axboe 提交于
This was documented in the original commit, 64f1c21e, but it never made it into the proper location for queue sysfs files. Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Christoph Hellwig 提交于
Similar to the simple fast path, but we now need a dio structure to track multiple-bio completions. It's basically a cut-down version of the new iomap-based direct I/O code for filesystems, but without all the logic to call into the filesystem for extent lookup or allocation, and without the complex I/O completion workqueue handler for AIO - instead we just use the FUA bit on the bios to ensure data is flushed to stable storage. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Jens Axboe 提交于
Split the op setting code into a helper, use it in both places. Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Jens Axboe 提交于
Just alloc the bio_vec array if we exceed the inline limit. Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Jens Axboe 提交于
The previous commit introduced the hybrid sleep/poll mode. Take that one step further, and use the completion latencies to automatically sleep for half the mean completion time. This is a good approximation. This changes the 'io_poll_delay' sysfs file a bit to expose the various options. Depending on the value, the polling code will behave differently: -1 Never enter hybrid sleep mode 0 Use half of the completion mean for the sleep delay >0 Use this specific value as the sleep delay Signed-off-by: NJens Axboe <axboe@fb.com> Tested-By: NStephen Bates <sbates@raithlin.com> Reviewed-By: NStephen Bates <sbates@raithlin.com>
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由 Jens Axboe 提交于
This patch enables a hybrid polling mode. Instead of polling after IO submission, we can induce an artificial delay, and then poll after that. For example, if the IO is presumed to complete in 8 usecs from now, we can sleep for 4 usecs, wake up, and then do our polling. This still puts a sleep/wakeup cycle in the IO path, but instead of the wakeup happening after the IO has completed, it'll happen before. With this hybrid scheme, we can achieve big latency reductions while still using the same (or less) amount of CPU. Signed-off-by: NJens Axboe <axboe@fb.com> Tested-By: NStephen Bates <sbates@raithlin.com> Reviewed-By: NStephen Bates <sbates@raithlin.com>
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由 Christoph Hellwig 提交于
This patch adds a small and simple fast patch for small direct I/O requests on block devices that don't use AIO. Between the neat bio_iov_iter_get_pages helper that avoids allocating a page array for get_user_pages and the on-stack bio and biovec this avoid memory allocations and atomic operations entirely in the direct I/O code (lower levels might still do memory allocations and will usually have at least some atomic operations, though). Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NJens Axboe <axboe@fb.com> Tested-By: NStephen Bates <sbates@raithlin.com> Reviewed-By: NStephen Bates <sbates@raithlin.com>
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由 Jens Axboe 提交于
For writes, we can get a completion in while we're still iterating the request and bio chain. If that happens, we're reading freed memory and we can crash. Break out after the last segment and avoid having the iterator read freed memory. Reviewed-by: NJosef Bacik <jbacik@fb.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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- 16 11月, 2016 5 次提交
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由 Arnd Bergmann 提交于
The newly added driver causes a harmless warning in some configurations: block/blk-wbt.c:250:1: error: ‘inline’ is not at beginning of declaration [-Werror=old-style-declaration] static bool inline stat_sample_valid(struct blk_rq_stat *stat) This makes it use the expected format for the declaration. Signed-off-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Yasuaki Ishimatsu 提交于
If CONFIG_NVM is disabled, loading null_block module with use_lightnvm=1 fails. But there are no messages and documents related to the failure. Add the appropriate error message. Signed-off-by: NYasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Massaged the text a bit. Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Ming Lei 提交于
In both legacy and mq path, req count of plug list is computed before allocating request, so the number can be stale when falling back to slept allocation, also the new introduced wbt can sleep too. This patch deals with the case by checking if plug list becomes empty, and fixes the KASAN report of 'BUG: KASAN: stack-out-of-bounds' which is introduced by Shaohua's patches of dispatching big request. Fixes: 600271d9(blk-mq: immediately dispatch big size request) Fixes: 50d24c34(block: immediately dispatch big size request) Cc: Shaohua Li <shli@fb.com> Signed-off-by: NMing Lei <ming.lei@canonical.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Omar Sandoval 提交于
Let's not depend on any of the BLK_MQ_RQ_QUEUE_* constants having specific values. No functional change. Signed-off-by: NOmar Sandoval <osandov@fb.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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由 Omar Sandoval 提交于
Let's not depend on any of the BLK_MQ_RQ_QUEUE_* constants having specific values. No functional change. Signed-off-by: NOmar Sandoval <osandov@fb.com> Reviewed-by: NKeith Busch <keith.busch@intel.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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