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aoe: defer rexmit timer downdev work to workqueue

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[ Upstream commit cffc873d68ab09a0432b8212008c5613f8a70a2c ]

When aoe's rexmit_timer() notices that an aoe target fails to respond to
commands for more than aoe_deadsecs, it calls aoedev_downdev() which
cleans the outstanding aoe and block queues. This can involve sleeping,
such as in blk_mq_freeze_queue(), which should not occur in irq context.

This patch defers that aoedev_downdev() call to the aoe device's
workqueue.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=212665
Signed-off-by: Justin Sanders <jsanders.devel@gmail.com>
Link: https://lore.kernel.org/r/20250610170600.869-2-jsanders.devel@gmail.com
Tested-By: Valentin Kleibel <valentin@vrvis.at>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Justin Sanders
2025-06-10 17:06:00 +00:00
committed by Greg Kroah-Hartman
parent 55dfffc5e9
commit 270d637100
3 changed files with 11 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/block/aoe/aoe.h
View File

@@ -80,6 +80,7 @@ enum {
DEVFL_NEWSIZE = (1<<6), /* need to update dev size in block layer */
DEVFL_FREEING = (1<<7), /* set when device is being cleaned up */
DEVFL_FREED = (1<<8), /* device has been cleaned up */
DEVFL_DEAD = (1<<9), /* device has timed out of aoe_deadsecs */
};
enum {

8
drivers/block/aoe/aoecmd.c
View File

@@ -754,7 +754,7 @@ rexmit_timer(struct timer_list *timer)
utgts = count_targets(d, NULL);
if (d->flags & DEVFL_TKILL) {
if (d->flags & (DEVFL_TKILL | DEVFL_DEAD)) {
spin_unlock_irqrestore(&d->lock, flags);
return;
}
@@ -786,7 +786,8 @@ rexmit_timer(struct timer_list *timer)
* to clean up.
*/
list_splice(&flist, &d->factive[0]);
aoedev_downdev(d);
d->flags |= DEVFL_DEAD;
queue_work(aoe_wq, &d->work);
goto out;
}
@@ -898,6 +899,9 @@ aoecmd_sleepwork(struct work_struct *work)
{
struct aoedev *d = container_of(work, struct aoedev, work);
if (d->flags & DEVFL_DEAD)
aoedev_downdev(d);
if (d->flags & DEVFL_GDALLOC)
aoeblk_gdalloc(d);

5
drivers/block/aoe/aoedev.c
View File

@@ -200,8 +200,11 @@ aoedev_downdev(struct aoedev *d)
struct list_head *head, *pos, *nx;
struct request *rq, *rqnext;
int i;
unsigned long flags;
d->flags &= ~DEVFL_UP;
spin_lock_irqsave(&d->lock, flags);
d->flags &= ~(DEVFL_UP | DEVFL_DEAD);
spin_unlock_irqrestore(&d->lock, flags);
/* clean out active and to-be-retransmitted buffers */
for (i = 0; i < NFACTIVE; i++) {