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See http://www.infradead.org/rpr.html X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1788968978928210332 X-GMAIL-MSGID: 1788968978928210332 Make sure all in-line block layer submission runs in noio reclaim context. This is a big step towards allowing GFP_NOIO, the other one would be to have noio (and nofs for that matter) workqueues for kblockd and driver internal workqueues. Signed-off-by: Christoph Hellwig --- block/blk-core.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/block/blk-core.c b/block/blk-core.c index 11342af420d0c4..b85ef8a0fdf6a0 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -691,6 +691,8 @@ static void __submit_bio_noacct_mq(struct bio *bio) void submit_bio_noacct_nocheck(struct bio *bio) { + unsigned int noio_flag = memalloc_noio_save(); + blk_cgroup_bio_start(bio); blkcg_bio_issue_init(bio); @@ -715,6 +717,8 @@ void submit_bio_noacct_nocheck(struct bio *bio) __submit_bio_noacct_mq(bio); else __submit_bio_noacct(bio); + + memalloc_noio_restore(noio_flag); } /**