- 11 9月, 2009 15 次提交
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由 Shan Wei 提交于
The blktrace tools can show process id when cfq dispatched a request, using cfq_log_cfqq() instead of cfq_log(). Signed-off-by: NShan Wei <shanwei@cn.fujitsu.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Jens Axboe 提交于
It's not currently used, as pointed out by Gui Jianfeng <guijianfeng@cn.fujitsu.com>. We already check the wait_request flag to allow an idling queue priority allocation access, so we don't need this extra flag. Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Jens Axboe 提交于
We already have interrupts disabled at that point, so use the __raise_softirq_irqoff() variant. Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Jens Axboe 提交于
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Jens Axboe 提交于
It's not exported, I doubt we'll have a reason to change this... Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Jens Axboe 提交于
Note sure why they happened in the first place, probably some bad terminal setting. Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Jens Axboe 提交于
This borrows some code from NAPI and implements a polled completion mode for block devices. The idea is the same as NAPI - instead of doing the command completion when the irq occurs, schedule a dedicated softirq in the hopes that we will complete more IO when the iopoll handler is invoked. Devices have a budget of commands assigned, and will stay in polled mode as long as they continue to consume their budget from the iopoll softirq handler. If they do not, the device is set back to interrupt completion mode. This patch holds the core bits for blk-iopoll, device driver support sold separately. Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Jens Axboe 提交于
Instead of just checking whether this device uses block layer tagging, we can improve the detection by looking at the maximum queue depth it has reached. If that crosses 4, then deem it a queuing device. This is important on high IOPS devices, since plugging hurts the performance there (it can be as much as 10-15% of the sys time). Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Jens Axboe 提交于
Get rid of any functions that test for these bits and make callers use bio_rw_flagged() directly. Then it is at least directly apparent what variable and flag they check. Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Hannes Reinecke 提交于
Whenever a block device changes it's read-only attribute notify the userspace about it. Signed-off-by: NHannes Reinecke <hare@suse.de> Signed-off-by: NNikanth Karthikesan <knikanth@suse.de> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Vivek Goyal 提交于
o Get rid of busy_rt_queues infrastructure. Looks like it is redundant. o Once an RT queue gets request it will preempt any of the BE or IDLE queues immediately. Otherwise this queue will be put on service tree and scheduler will anyway select this queue before any of the BE or IDLE queue. Hence looks like there is no need to keep track of how many busy RT queues are currently on service tree. Signed-off-by: NVivek Goyal <vgoyal@redhat.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Jens Axboe 提交于
To lessen the impact of async IO on sync IO, let the device drain of any async IO in progress when switching to a sync cfqq that has idling enabled. Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Tejun Heo 提交于
Update scsi_io_completion() such that it only fails requests till the next error boundary and retry the leftover. This enables block layer to merge requests with different failfast settings and still behave correctly on errors. Allow merge of requests of different failfast settings. As SCSI is currently the only subsystem which follows failfast status, there's no need to worry about other block drivers for now. Signed-off-by: NTejun Heo <tj@kernel.org> Cc: Niel Lambrechts <niel.lambrechts@gmail.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Tejun Heo 提交于
Failfast has characteristics from other attributes. When issuing, executing and successuflly completing requests, failfast doesn't make any difference. It only affects how a request is handled on failure. Allowing requests with different failfast settings to be merged cause normal IOs to fail prematurely while not allowing has performance penalties as failfast is used for read aheads which are likely to be located near in-flight or to-be-issued normal IOs. This patch introduces the concept of 'mixed merge'. A request is a mixed merge if it is merge of segments which require different handling on failure. Currently the only mixable attributes are failfast ones (or lack thereof). When a bio with different failfast settings is added to an existing request or requests of different failfast settings are merged, the merged request is marked mixed. Each bio carries failfast settings and the request always tracks failfast state of the first bio. When the request fails, blk_rq_err_bytes() can be used to determine how many bytes can be safely failed without crossing into an area which requires further retrials. This allows request merging regardless of failfast settings while keeping the failure handling correct. This patch only implements mixed merge but doesn't enable it. The next one will update SCSI to make use of mixed merge. Signed-off-by: NTejun Heo <tj@kernel.org> Cc: Niel Lambrechts <niel.lambrechts@gmail.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Tejun Heo 提交于
bio and request use the same set of failfast bits. This patch makes the following changes to simplify things. * enumify BIO_RW* bits and reorder bits such that BIOS_RW_FAILFAST_* bits coincide with __REQ_FAILFAST_* bits. * The above pushes BIO_RW_AHEAD out of sync with __REQ_FAILFAST_DEV but the matching is useless anyway. init_request_from_bio() is responsible for setting FAILFAST bits on FS requests and non-FS requests never use BIO_RW_AHEAD. Drop the code and comment from blk_rq_bio_prep(). * Define REQ_FAILFAST_MASK which is OR of all FAILFAST bits and simplify FAILFAST flags handling in init_request_from_bio(). Signed-off-by: NTejun Heo <tj@kernel.org> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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- 02 9月, 2009 1 次提交
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由 Nikanth Karthikesan 提交于
The patch "block: Use accessor functions for queue limits" (ae03bf63) changed queue_max_sectors_store() to use blk_queue_max_sectors() instead of directly assigning the value. But blk_queue_max_sectors() differs a bit 1. It sets both max_sectors_kb, and max_hw_sectors_kb 2. Never allows one to change max_sectors_kb above BLK_DEF_MAX_SECTORS. If one specifies a value greater then max_hw_sectors is set to that value but max_sectors is set to BLK_DEF_MAX_SECTORS I am not sure whether blk_queue_max_sectors() should be changed, as it seems to be that way for a long time. And there may be callers dependent on that behaviour. This patch simply reverts to the older way of directly assigning the value to max_sectors as it was before. Signed-off-by: NNikanth Karthikesan <knikanth@suse.de> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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- 05 8月, 2009 1 次提交
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由 John Stoffel 提交于
Make SCSI SG v4 driver enabled by default and remove EXPERIMENTAL dependency, since udev depends on BSG Make Block Layer SG support v4 the default, since recent udev versions depend on this to access serial numbers and other low level info properly. This should be backported to older kernels as well, since most distros have enabled this for a long time. Signed-off-by: NJohn Stoffel <john@stoffel.org> Cc: stable@kernel.org Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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- 01 8月, 2009 4 次提交
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由 Martin K. Petersen 提交于
Update topology comments and sysfs documentation based upon discussions with Neil Brown. Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Martin K. Petersen 提交于
When stacking block devices ensure that optimal I/O size is scaled accordingly. Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com> Reviewed-by: NMike Snitzer <snitzer@redhat.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Martin K. Petersen 提交于
Introduce blk_limits_io_min() and make blk_queue_io_min() call it. Signed-off-by: NMike Snitzer <snitzer@redhat.com> Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Martin K. Petersen 提交于
blk_queue_stack_limits() has been superceded by blk_stack_limits() and disk_stack_limits(). Wrap the function call for now, we'll deprecate it later. Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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- 29 7月, 2009 1 次提交
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由 Jens Axboe 提交于
Prior to the change for more sane end_io functions, we exported the helpers with the normal EXPORT_SYMBOL(). That got changed to _GPL() for the new interface. Revert that particular change, on the basis that this is basic functionality and doesn't dip into internal structures. If these exports can't be non-GPL, then we may as well make EXPORT_SYMBOL() imply GPL for everything. Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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- 28 7月, 2009 2 次提交
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由 Xiaotian Feng 提交于
blk_integrity_unregister should use kobject_put to release the kobject, otherwise after bi is freed, memory of bi->kobj->name is leaked. Signed-off-by: NXiaotian Feng <dfeng@redhat.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Jens Axboe 提交于
Move the assignment of a default lock below blk_init_queue() to blk_queue_make_request(), so we also get to set the default lock for ->make_request_fn() based drivers. This is important since the queue flag locking requires a lock to be in place. Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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- 17 7月, 2009 2 次提交
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由 Xiaotian Feng 提交于
In blk-sysfs.c, queue_var_store uses unsigned long to store data, but queue_var_show uses unsigned int to show data. This causes, # echo 70000000000 > /sys/block/<dev>/queue/read_ahead_kb # cat /sys/block/<dev>/queue/read_ahead_kb => get wrong value Fix it by using unsigned long. While at it, convert queue_rq_affinity_show() such that it uses bool variable instead of explicit != 0 testing. Signed-off-by: NXiaotian Feng <dfeng@redhat.com> Signed-off-by: NTejun Heo <tj@kernel.org>
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由 Tejun Heo 提交于
Commit ab0fd1de tries to prevent merge of requests with different failfast settings. In elv_rq_merge_ok(), it compares new bio's failfast flags against the merge target request's. However, the flag testing accessors for bio and blk don't return boolean but the tested bit value directly and FAILFAST on bio and blk don't match, so directly comparing them with == results in false negative unnecessary preventing merge of readahead requests. This patch convert the results to boolean by negating them before comparison. Signed-off-by: NTejun Heo <tj@kernel.org> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Boaz Harrosh <bharrosh@panasas.com> Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Jeff Garzik <jeff@garzik.org>
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- 11 7月, 2009 2 次提交
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由 Vivek Goyal 提交于
In case memory is scarce, we now default to oom_cfqq. Once memory is available again, we should allocate a new cfqq and stop using oom_cfqq for a particular io context. Once a new request comes in, check if we are using oom_cfqq, and if yes, try to allocate a new cfqq. Tested the patch by forcing the use of oom_cfqq and upon next request thread realized that it was using oom_cfqq and it allocated a new cfqq. Signed-off-by: NVivek Goyal <vgoyal@redhat.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 FUJITA Tomonori 提交于
Currently, blk_scsi_ioctl_init() is not called since it lacks an initcall marking. This causes the command table to be unitialized, hence somce commands are block when they should not have been. This fixes a regression introduced by commit 018e0446Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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- 04 7月, 2009 1 次提交
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由 Tejun Heo 提交于
Block layer used to merge requests and bios with different failfast settings. This caused regular IOs to fail prematurely when they were merged into failfast requests for readahead. Niel Lambrechts could trigger the problem semi-reliably on ext4 when resuming from STR. ext4 uses readahead when reading inodes and combined with the deterministic extra SATA PHY exception cycle during resume on the specific configuration, non-readahead inode read would fail causing ext4 errors. Please read the following thread for details. http://lkml.org/lkml/2009/5/23/21 This patch makes block layer reject merging if the failfast settings don't match. This is correct but likely to lower IO performance by preventing regular IOs from mingling into surrounding readahead requests. Changes to allow such mixed merges and handle errors correctly will be added later. Signed-off-by: NTejun Heo <tj@kernel.org> Reported-by: NNiel Lambrechts <niel.lambrechts@gmail.com> Cc: Theodore Tso <tytso@mit.edu> Signed-off-by: NJens Axboe <axboe@carl.(none)>
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- 01 7月, 2009 6 次提交
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由 Shan Wei 提交于
With the changes for falling back to an oom_cfqq, we never fail to find/allocate a queue in cfq_get_queue(). So remove the check. Signed-off-by: NShan Wei <shanwei@cn.fujitsu.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 NeilBrown 提交于
The next_ordered flag is only meaningful for devices that use __make_request. So move the test against next_ordered out of generic code and in to __make_request Since this test was added, barriers have not worked on md or any devices that don't use __make_request and so don't bother to set next_ordered. (dm explicitly sets something other than QUEUE_ORDERED_NONE since commit 99360b4c but notes in the comments that it is otherwise meaningless). Cc: Ken Milmore <ken.milmore@googlemail.com> Cc: stable@kernel.org Signed-off-by: NNeilBrown <neilb@suse.de> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Jens Axboe 提交于
The initial patches to support this through sysfs export were broken and have been if 0'ed out in any release. So lets just kill the code and reclaim some space in struct request_queue, if anyone would later like to fixup the sysfs bits, the git history can easily restore the removed bits. Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Martin K. Petersen 提交于
This patch restores stacking ability to the block layer integrity infrastructure by creating a set of dedicated bip slabs. Each bip slab has an embedded bio_vec array at the end. This cuts down on memory allocations and also simplifies the code compared to the original bvec version. Only the largest bip slab is backed by a mempool. The pool is contained in the bio_set so stacking drivers can ensure forward progress. Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com> Signed-off-by: NJens Axboe <axboe@carl.(none)>
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由 Jens Axboe 提交于
Setup an emergency fallback cfqq that we allocate at IO scheduler init time. If the slab allocation fails in cfq_find_alloc_queue(), we'll just punt IO to that cfqq instead. This ensures that cfq_find_alloc_queue() never fails without having to ensure free memory. On cfqq lookup, always try to allocate a new cfqq if the given cfq io context has the oom_cfqq assigned. This ensures that we only temporarily punt to this shared queue. Reviewed-by: NJeff Moyer <jmoyer@redhat.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Jens Axboe 提交于
We're going to be needing that init code outside of that function to get rid of the __GFP_NOFAIL in cfqq allocation. Reviewed-by: NJeff Moyer <jmoyer@redhat.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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- 21 6月, 2009 1 次提交
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由 FUJITA Tomonori 提交于
The SMP handler (sas_smp_request) was fixed to use the block API properly, so we don't need this workaround to avoid blk_put_request() warning. Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>
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- 19 6月, 2009 2 次提交
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由 Randy Dunlap 提交于
Warning(block/blk-settings.c:108): No description found for parameter 'lim' Warning(block/blk-settings.c:108): Excess function parameter 'limits' description in 'blk_set_default_limits' Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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Follow-up to "block: enable by default support for large devices and files on 32-bit archs". Rename CONFIG_LBD to CONFIG_LBDAF to: - allow update of existing [def]configs for "default y" change - reflect that it is used also for large files support nowadays Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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- 18 6月, 2009 1 次提交
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由 Martin K. Petersen 提交于
Correct stacking bounce_pfn limit setting and prevent warnings on 32-bit. Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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- 16 6月, 2009 1 次提交
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由 Li Zefan 提交于
When porting blktrace to tracepoints, we changed to trace/block.h for trace prober declarations. Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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