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blk-mq: change gfp flags to GFP_NOIO in blk_mq_realloc_hw_ctxs

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blk_mq_realloc_hw_ctxs could be invoked during update hw queues.
At the momemt, IO is blocked. Change the gfp flags from GFP_KERNEL
to GFP_NOIO to avoid forever hang during memory allocation in
blk_mq_realloc_hw_ctxs.

Signed-off-by: Jianchao Wang <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Jianchao Wang 2018-10-12 18:07:26 +08:00 • committed by Jens Axboe
commit 5b202853ff
4 changed files with 15 additions and 12 deletions
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6
block/blk-flush.c
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@ -566,12 +566,12 @@ int blkdev_issue_flush(struct block_device *bdev, gfp_t gfp_mask,
EXPORT_SYMBOL(blkdev_issue_flush);
struct blk_flush_queue *blk_alloc_flush_queue(struct request_queue *q,
int node, int cmd_size)
int node, int cmd_size, gfp_t flags)
{
struct blk_flush_queue *fq;
int rq_sz = sizeof(struct request);
fq = kzalloc_node(sizeof(*fq), GFP_KERNEL, node);
fq = kzalloc_node(sizeof(*fq), flags, node);
if (!fq)
goto fail;
@ -579,7 +579,7 @@ struct blk_flush_queue *blk_alloc_flush_queue(struct request_queue *q,
spin_lock_init(&fq->mq_flush_lock);
rq_sz = round_up(rq_sz + cmd_size, cache_line_size());
fq->flush_rq = kzalloc_node(rq_sz, GFP_KERNEL, node);
fq->flush_rq = kzalloc_node(rq_sz, flags, node);
if (!fq->flush_rq)
goto fail_rq;