Hi [This is an automated email] This commit has been processed because it contains a -stable tag. The stable tag indicates that it's relevant for the following trees: all The bot has tested the following trees: v5.7.8, v5.4.51, v4.19.132, v4.14.188, v4.9.230, v4.4.230. v5.7.8: Build OK! v5.4.51: Build OK! v4.19.132: Build OK! v4.14.188: Failed to apply! Possible dependencies: 1d316e658374f ("bcache: implement PI controller for writeback rate") 25d8be77e1922 ("block: move bio_alloc_pages() to bcache") 27a40ab9269e7 ("bcache: add backing_request_endio() for bi_end_io") 2831231d4c3f9 ("bcache: reduce cache_set devices iteration by devices_max_used") 3b304d24a718a ("bcache: convert cached_dev.count from atomic_t to refcount_t") 3fd47bfe55b00 ("bcache: stop dc->writeback_rate_update properly") 5138ac6748e38 ("bcache: fix misleading error message in bch_count_io_errors()") 539d39eb27083 ("bcache: fix wrong return value in bch_debug_init()") 5fa89fb9a86bc ("bcache: don't write back data if reading it failed") 6f10f7d1b02b1 ("bcache: style fix to replace 'unsigned' by 'unsigned int'") 771f393e8ffc9 ("bcache: add CACHE_SET_IO_DISABLE to struct cache_set flags") 7ba0d830dc0e4 ("bcache: set error_limit correctly") 7e027ca4b534b ("bcache: add stop_when_cache_set_failed option to backing device") 804f3c6981f5e ("bcache: fix cached_dev->count usage for bch_cache_set_error()") a8500fc816b19 ("bcache: rearrange writeback main thread ratelimit") b1092c9af9ed8 ("bcache: allow quick writeback when backing idle") bc082a55d25c8 ("bcache: fix inaccurate io state for detached bcache devices") c7b7bd07404c5 ("bcache: add io_disable to struct cached_dev") v4.9.230: Failed to apply! Possible dependencies: 1d316e658374f ("bcache: implement PI controller for writeback rate") 2831231d4c3f9 ("bcache: reduce cache_set devices iteration by devices_max_used") 297e3d8547848 ("blk-throttle: make throtl_slice tunable") 3fd47bfe55b00 ("bcache: stop dc->writeback_rate_update properly") 4e4cbee93d561 ("block: switch bios to blk_status_t") 5138ac6748e38 ("bcache: fix misleading error message in bch_count_io_errors()") 6f10f7d1b02b1 ("bcache: style fix to replace 'unsigned' by 'unsigned int'") 7e027ca4b534b ("bcache: add stop_when_cache_set_failed option to backing device") 87760e5eef359 ("block: hook up writeback throttling") 9e234eeafbe17 ("blk-throttle: add a simple idle detection") c7b7bd07404c5 ("bcache: add io_disable to struct cached_dev") cf43e6be865a5 ("block: add scalable completion tracking of requests") e806402130c9c ("block: split out request-only flags into a new namespace") fbbaf700e7b16 ("block: trace completion of all bios.") v4.4.230: Failed to apply! Possible dependencies: 005411ea7ee77 ("doc: update block/queue-sysfs.txt entries") 1d316e658374f ("bcache: implement PI controller for writeback rate") 2831231d4c3f9 ("bcache: reduce cache_set devices iteration by devices_max_used") 297e3d8547848 ("blk-throttle: make throtl_slice tunable") 38f8baae89056 ("block: factor out chained bio completion") 3fd47bfe55b00 ("bcache: stop dc->writeback_rate_update properly") 4e4cbee93d561 ("block: switch bios to blk_status_t") 511cbce2ff8b9 ("irq_poll: make blk-iopoll available outside the block layer") 5138ac6748e38 ("bcache: fix misleading error message in bch_count_io_errors()") 6f10f7d1b02b1 ("bcache: style fix to replace 'unsigned' by 'unsigned int'") 7e027ca4b534b ("bcache: add stop_when_cache_set_failed option to backing device") 87760e5eef359 ("block: hook up writeback throttling") 8d354f133e86d ("blk-mq: improve layout of blk_mq_hw_ctx") 9467f85960a31 ("blk-mq/cpu-notif: Convert to new hotplug state machine") 9e234eeafbe17 ("blk-throttle: add a simple idle detection") af3e3a5259e35 ("block: don't unecessarily clobber bi_error for chained bios") ba8c6967b7391 ("block: cleanup bio_endio") c7b7bd07404c5 ("bcache: add io_disable to struct cached_dev") cf43e6be865a5 ("block: add scalable completion tracking of requests") e57690fe009b2 ("blk-mq: don't overwrite rq->mq_ctx") fbbaf700e7b16 ("block: trace completion of all bios.") NOTE: The patch will not be queued to stable trees until it is upstream. How should we proceed with this patch? -- Thanks Sasha