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| author |   Oleksandr Natalenko <oleksandr@natalenko.name> | 2021-07-17 14:33:28 +0200 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2021-07-17 13:07:24 -0600 |
| commit | ec645dc96699ea6c37b6de86c84d7288ea9a4ddf (patch) | |
| tree | 0314c2c6a6ee24351ca833b692852484ebf500d8 | |
| parent | xen-blkfront: sanitize the removal state machine (diff) | |
| download | linux-dev-ec645dc96699ea6c37b6de86c84d7288ea9a4ddf.tar.xz linux-dev-ec645dc96699ea6c37b6de86c84d7288ea9a4ddf.zip | |
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>
| -rw-r--r-- | include/linux/blkdev.h | 2 |
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); |