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 <hch@xxxxxx>
---
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);
}
/**
--
2.39.2
