- 20 Apr, 2017 40 commits
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Stephen Bates authored
Fixes an issue where the size of the poll_stat array in request_queue does not match the size expected by the new size based bucketing for IO completion polling. Fixes: 720b8ccc ("blk-mq: Add a polling specific stats function") Signed-off-by:
Stephen Bates <sbates@raithlin.com> Signed-off-by:
Jens Axboe <axboe@fb.com>
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Jens Axboe authored
We must have dropped the ctx before we call blk_mq_sched_insert_request() with can_block=true, otherwise we risk that a flush request can block on insertion if we are currently out of tags. [ 47.667190] BUG: scheduling while atomic: jbd2/sda2-8/2089/0x00000002 [ 47.674493] Modules linked in: x86_pkg_temp_thermal btrfs xor zlib_deflate raid6_pq sr_mod cdre [ 47.690572] Preemption disabled at: [ 47.690584] [<ffffffff81326c7c>] blk_mq_sched_get_request+0x6c/0x280 [ 47.701764] CPU: 1 PID: 2089 Comm: jbd2/sda2-8 Not tainted 4.11.0-rc7+ #271 [ 47.709630] Hardware name: Dell Inc. PowerEdge T630/0NT78X, BIOS 2.3.4 11/09/2016 [ 47.718081] Call Trace: [ 47.720903] dump_stack+0x4f/0x73 [ 47.724694] ? blk_mq_sched_get_request+0x6c/0x280 [ 47.730137] __schedule_bug+0x6c/0xc0 [ 47.734314] __schedule+0x559/0x780 [ 47.738302] schedule+0x3b/0x90 [ 47.741899] io_schedule+0x11/0x40 [ 47.745788] blk_mq_get_tag+0x167/0x2a0 [ 47.750162] ? remove_wait_queue+0x70/0x70 [ 47.754901] blk_mq_get_driver_tag+0x92/0xf0 [ 47.759758] blk_mq_sched_insert_request+0x134/0x170 [ 47.765398] ? blk_account_io_start+0xd0/0x270 [ 47.770679] blk_mq_make_request+0x1b2/0x850 [ 47.775766] generic_make_request+0xf7/0x2d0 [ 47.780860] submit_bio+0x5f/0x120 [ 47.784979] ? submit_bio+0x5f/0x120 [ 47.789631] submit_bh_wbc.isra.46+0x10d/0x130 [ 47.794902] submit_bh+0xb/0x10 [ 47.798719] journal_submit_commit_record+0x190/0x210 [ 47.804686] ? _raw_spin_unlock+0x13/0x30 [ 47.809480] jbd2_journal_commit_transaction+0x180a/0x1d00 [ 47.815925] kjournald2+0xb6/0x250 [ 47.820022] ? kjournald2+0xb6/0x250 [ 47.824328] ? remove_wait_queue+0x70/0x70 [ 47.829223] kthread+0x10e/0x140 [ 47.833147] ? commit_timeout+0x10/0x10 [ 47.837742] ? kthread_create_on_node+0x40/0x40 [ 47.843122] ret_from_fork+0x29/0x40 Fixes: a4d907b6 ("blk-mq: streamline blk_mq_make_request") Reviewed-by:
Omar Sandoval <osandov@fb.com> Signed-off-by:
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Stephen Bates authored
Rather than bucketing IO statisics based on direction only we also bucket based on the IO size. This leads to improved polling performance. Update the bucket callback function and use it in the polling latency estimation. Signed-off-by:
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Stephen Bates authored
In order to allow for filtering of IO based on some other properties of the request than direction we allow the bucket function to return an int. If the bucket callback returns a negative do no count it in the stats accumulation. Signed-off-by:
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Christoph Hellwig authored
Signed-off-by:
Christoph Hellwig <hch@lst.de> Reviewed-by:
Bart Van Assche <Bart.VanAssche@sandisk.com> Acked-by:
Roger Pau Monné <roger.pau@citrix.com> Reviewed-by:
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by:
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Christoph Hellwig authored
Signed-off-by:
Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by:
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Christoph Hellwig authored
Signed-off-by:
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Christoph Hellwig authored
Signed-off-by:
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Christoph Hellwig authored
Signed-off-by:
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Christoph Hellwig authored
This is for the legacy floppy and ataflop drivers that currently abuse ->errors for this purpose. It's stashed away in a union to not grow the struct size, the other fields are either used by modern drivers for different purposes or the I/O scheduler before queing the I/O to drivers. Signed-off-by:
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Christoph Hellwig authored
Merge blk_mq_ipi_complete_request and blk_mq_stat_add into their only caller. Signed-off-by:
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Christoph Hellwig authored
Now that all drivers that call blk_mq_complete_requests have a ->complete callback we can remove the direct call to blk_mq_end_request, as well as the error argument to blk_mq_complete_request. Signed-off-by:
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Christoph Hellwig authored
xen-blkfron is the last users using rq->errros for passing back error to blk-mq, and I'd like to get rid of that. In the longer run the driver should be moving more of the completion processing into .complete, but this is the minimal change to move forward for now. Signed-off-by:
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Christoph Hellwig authored
Instead of using req->errors, which will go away. Signed-off-by:
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Christoph Hellwig authored
Add a nbd-specific field instead. Signed-off-by:
Josef Bacik <jbacik@fb.com> Signed-off-by:
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Christoph Hellwig authored
We'll get all proper errors reported through ->end_io and ->errors will go away soon. Signed-off-by:
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Christoph Hellwig authored
dm never uses rq->errors, so there is no need to pass an error argument to blk_mq_complete_request. Signed-off-by:
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Christoph Hellwig authored
Signed-off-by:
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Christoph Hellwig authored
In thruth I've just audited which blk-mq drivers don't currently have a complete callback, but I think this change is at least borderline useful. Signed-off-by:
Ming Lei <ming.lei@redhat.com> Signed-off-by:
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Christoph Hellwig authored
This passes on the scsi_cmnd result field to users of passthrough requests. Currently we abuse req->errors for this purpose, but that field will go away in its current form. Note that the old IDE code abuses the errors field in very creative ways and stores all kinds of different values in it. I didn't dare to touch this magic, so the abuses are brought forward 1:1. Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by:
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Christoph Hellwig authored
Remove passing req->errors (which at that point is always 0) to blk_mq_complete_request, and rely on the virtio status code for the serial number passthrough request. Signed-off-by:
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Christoph Hellwig authored
Signed-off-by:
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Christoph Hellwig authored
Currently it's used by the lighnvm passthrough ioctl, but we'd like to make it private in preparation of block layer specific error code. Lighnvm already returns the real NVMe status anyway, so I think we can just limit it to returning -EIO for any status set. This will need a careful audit from the lightnvm folks, though. Signed-off-by:
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Christoph Hellwig authored
We want our own clearly defined error field for NVMe passthrough commands, and the request errors field is going away in its current form. Just store the status and result field in the nvme_request field from hardirq completion context (using a new helper) and then generate a Linux errno for the block layer only when we actually need it. Because we can't overload the status value with a negative error code for cancelled command we now have a flags filed in struct nvme_request that contains a bit for this condition. Signed-off-by:
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Christoph Hellwig authored
nvme_complete_async_event expects the little endian status code including the phase bit, and a new completion handler I plan to introduce will do so as well. Change the status variable into the little endian format with the phase bit used in the NVMe CQE to fix / enable this. Signed-off-by:
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Christoph Hellwig authored
The function only returns -EIO if rq->errors is non-zero, which is not very useful and lets a large number of callers ignore the return value. Just let the callers figure out their error themselves. Signed-off-by:
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Christoph Hellwig authored
The driver never sets req->errors, so blk_execute_rq will always return 0. Signed-off-by:
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Jan Kara authored
Drop 'parent' argument of bdi_register() and bdi_register_va(). It is always NULL. Reviewed-by:
Jan Kara <jack@suse.cz> Signed-off-by:
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Jan Kara authored
Now that all backing_dev_info structure are allocated separately, we can drop some unused functions. Reviewed-by:
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Jan Kara authored
Now that all bdi structures filesystems use are properly refcounted, we can remove the SB_I_DYNBDI flag. Reviewed-by:
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Jan Kara authored
Allocate struct backing_dev_info separately instead of embedding it inside the superblock. This unifies handling of bdi among users. CC: Richard Weinberger <richard@nod.at> CC: Artem Bityutskiy <dedekind1@gmail.com> CC: Adrian Hunter <adrian.hunter@intel.com> CC: linux-mtd@lists.infradead.org Acked-by:
Richard Weinberger <richard@nod.at> Reviewed-by:
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Jan Kara authored
Allocate struct backing_dev_info separately instead of embedding it inside the superblock. This unifies handling of bdi among users. CC: Anna Schumaker <anna.schumaker@netapp.com> CC: linux-nfs@vger.kernel.org Reviewed-by:
Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by:
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Jan Kara authored
Allocate struct backing_dev_info separately instead of embedding it inside the superblock. This unifies handling of bdi among users. CC: Petr Vandrovec <petr@vandrovec.name> Acked-by:
Petr Vandrovec <petr@vandrovec.name> Reviewed-by:
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Jan Kara authored
Similarly to set_bdev_super() NILFS2 just used block device reference to bdi. Convert it to properly getting bdi reference. The reference will get automatically dropped on superblock destruction. CC: linux-nilfs@vger.kernel.org Reviewed-by:
Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by:
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Jan Kara authored
Similarly to set_bdev_super() GFS2 just used block device reference to bdi. Convert it to properly getting bdi reference. The reference will get automatically dropped on superblock destruction. CC: Steven Whitehouse <swhiteho@redhat.com> CC: Bob Peterson <rpeterso@redhat.com> CC: cluster-devel@redhat.com Reviewed-by:
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Jan Kara authored
It is not needed anymore since bdi is initialized whenever superblock exists. CC: Miklos Szeredi <miklos@szeredi.hu> CC: linux-fsdevel@vger.kernel.org Suggested-by:
Miklos Szeredi <mszeredi@redhat.com> Reviewed-by:
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Jan Kara authored
Allocate struct backing_dev_info separately instead of embedding it inside the superblock. This unifies handling of bdi among users. CC: Miklos Szeredi <miklos@szeredi.hu> CC: linux-fsdevel@vger.kernel.org Acked-by:
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Jan Kara authored
Allocate struct backing_dev_info separately instead of embedding it inside the superblock. This unifies handling of bdi among users. CC: Boaz Harrosh <ooo@electrozaur.com> CC: Benny Halevy <bhalevy@primarydata.com> Acked-by:
Boaz Harrosh <ooo@electrozaur.com> Reviewed-by:
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Jan Kara authored
Allocate struct backing_dev_info separately instead of embedding it inside the superblock. This unifies handling of bdi among users. CC: Jan Harkes <jaharkes@cs.cmu.edu> CC: coda@cs.cmu.edu CC: codalist@coda.cs.cmu.edu Reviewed-by:
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Jan Kara authored
MTD already allocates backing_dev_info dynamically. Convert it to use generic infrastructure for this including proper refcounting. We drop mtd->backing_dev_info as its only use was to pass mtd_bdi pointer from one file into another and if we wanted to keep that in a clean way, we'd have to make mtd hold and drop bdi reference as needed which seems pointless for passing one global pointer... CC: David Woodhouse <dwmw2@infradead.org> CC: Brian Norris <computersforpeace@gmail.com> CC: linux-mtd@lists.infradead.org Reviewed-by:
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