After merging the iolatency policy, we potentially now have 4 policies being registered, but only support 3. This causes one of them to fail loading. Takashi reports that BFQ no longer works for him, because it fails to load due to policy registration failure. Bump to 5 policies, and also add a warning for when we have exceeded the global amount. If we have to touch this again, we should switch to a dynamic scheme instead.
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| @@ -54,7 +54,7 @@ struct blk_stat_callback; · 53 unmodified lines | |||
| 54 | * Maximum number of blkcg policies allowed to be registered concurrently. | 54 | * Maximum number of blkcg policies allowed to be registered concurrently. |
| 55 | * Defined here to simplify include dependency. | 55 | * Defined here to simplify include dependency. |
| 56 | */ | 56 | */ |
| 57 | #define BLKCG_MAX_POLS 3 | 57 | #define BLKCG_MAX_POLS 5 |
| 58 | 58 | ||
| 59 | typedef void (rq_end_io_fn)(struct request *, blk_status_t); | 59 | typedef void (rq_end_io_fn)(struct request *, blk_status_t); |
| 60 | 60 | ||