This is a note to let you know that I've just added the patch titled
bcache: do not subtract sectors_to_gc for bypassed IO
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bcache-do-not-subtract-sectors_to_gc-for-bypassed-io.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 69daf03adef5f7bc13e0ac86b4b8007df1767aab Mon Sep 17 00:00:00 2001
From: Tang Junhui <tang.junhui@xxxxxxxxxx>
Date: Wed, 6 Sep 2017 14:25:53 +0800
Subject: bcache: do not subtract sectors_to_gc for bypassed IO
From: Tang Junhui <tang.junhui@xxxxxxxxxx>
commit 69daf03adef5f7bc13e0ac86b4b8007df1767aab upstream.
Since bypassed IOs use no bucket, so do not subtract sectors_to_gc to
trigger gc thread.
Signed-off-by: tang.junhui <tang.junhui@xxxxxxxxxx>
Acked-by: Coly Li <colyli@xxxxxxx>
Reviewed-by: Eric Wheeler <bcache@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/bcache/request.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/md/bcache/request.c
+++ b/drivers/md/bcache/request.c
@@ -196,12 +196,12 @@ static void bch_data_insert_start(struct
struct data_insert_op *op = container_of(cl, struct data_insert_op, cl);
struct bio *bio = op->bio, *n;
- if (atomic_sub_return(bio_sectors(bio), &op->c->sectors_to_gc) < 0)
- wake_up_gc(op->c);
-
if (op->bypass)
return bch_data_invalidate(cl);
+ if (atomic_sub_return(bio_sectors(bio), &op->c->sectors_to_gc) < 0)
+ wake_up_gc(op->c);
+
/*
* Journal writes are marked REQ_FLUSH; if the original write was a
* flush, it'll wait on the journal write.
Patches currently in stable-queue which might be from tang.junhui@xxxxxxxxxx are
queue-4.4/bcache-do-not-subtract-sectors_to_gc-for-bypassed-io.patch
queue-4.4/bcache-correct-cache_dirty_target-in-__update_writeback_rate.patch
queue-4.4/bcache-fix-for-gc-and-write-back-race.patch
queue-4.4/bcache-initialize-dirty-stripes-in-flash_dev_run.patch