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authorOleksandr Natalenko <oleksandr@natalenko.name>2021-07-17 15:33:28 +0300
committerJens Axboe <axboe@kernel.dk>2021-07-17 22:07:24 +0300
commitec645dc96699ea6c37b6de86c84d7288ea9a4ddf (patch)
tree0314c2c6a6ee24351ca833b692852484ebf500d8 /include/linux/blkdev.h
parent05d69d950d9d84218fc9beafd02dea1f6a70e09e (diff)
downloadlinux-ec645dc96699ea6c37b6de86c84d7288ea9a4ddf.tar.xz
block: increase BLKCG_MAX_POLS
After mq-deadline learned to deal with cgroups, the BLKCG_MAX_POLS value became too small for all the elevators to be registered properly. The following issue is seen: ``` calling bfq_init+0x0/0x8b @ 1 blkcg_policy_register: BLKCG_MAX_POLS too small initcall bfq_init+0x0/0x8b returned -28 after 507 usecs ``` which renders BFQ non-functional. Increase BLKCG_MAX_POLS to allow enough space for everyone. Fixes: 08a9ad8bf607 ("block/mq-deadline: Add cgroup support") Link: https://lore.kernel.org/lkml/8988303.mDXGIdCtx8@natalenko.name/ Signed-off-by: Oleksandr Natalenko <oleksandr@natalenko.name> Link: https://lore.kernel.org/r/20210717123328.945810-1-oleksandr@natalenko.name Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/blkdev.h')
-rw-r--r--include/linux/blkdev.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index c454fb446fd0..2e12320cb121 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -57,7 +57,7 @@ struct blk_keyslot_manager;
* Maximum number of blkcg policies allowed to be registered concurrently.
* Defined here to simplify include dependency.
*/
-#define BLKCG_MAX_POLS 5
+#define BLKCG_MAX_POLS 6
typedef void (rq_end_io_fn)(struct request *, blk_status_t);