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/openbmc/linux/drivers/md/bcache/ |
H A D | super.c | e6dcbd3e Fri Jun 28 06:59:28 CDT 2019 Coly Li <colyli@suse.de> bcache: avoid flushing btree node in cache_set_flush() if io disabled
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> e6dcbd3e Fri Jun 28 06:59:28 CDT 2019 Coly Li <colyli@suse.de> bcache: avoid flushing btree node in cache_set_flush() if io disabled 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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