bcache: avoid flushing btree node in cache_set_flush() if io disabled

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When cache_set_flush() is called for too many I/O errors detected on
cache device and the cache set is retiring, inside the function it
doesn't make sense to flushing cached btree nodes from c->btree_cache
because CACHE_SET_IO_DISABLE is set on c->flags already and all I/Os
onto cache device will be rejected.

This patch checks in cache_set_flush() that whether CACHE_SET_IO_DISABLE
is set. If yes, then avoids to flush the cached btree nodes to reduce
more time and make cache set retiring more faster.

Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Coly Li 2019-06-28 19:59:28 +08:00 • committed by Jens Axboe

parent 695277f16b

commit e6dcbd3e6c

1 changed files with 11 additions and 7 deletions

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18

drivers/md/bcache/super.c

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