git bisect start
# good: [8fe28cb58bcb235034b64cbbb7550a8a43fd88be] Linux 4.20
git bisect good 8fe28cb58bcb235034b64cbbb7550a8a43fd88be
# bad: [bfeffd155283772bbe78c6a05dec7c0128ee500c] Linux 5.0-rc1
git bisect bad bfeffd155283772bbe78c6a05dec7c0128ee500c
# good: [e0c38a4d1f196a4b17d2eba36afff8f656a4f1de] Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
git bisect good e0c38a4d1f196a4b17d2eba36afff8f656a4f1de
# bad: [02061181d3a9ccfe15ef6bc15fa56283acc47620] Merge tag 'staging-4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
git bisect bad 02061181d3a9ccfe15ef6bc15fa56283acc47620
# bad: [75f95da078b2891cd186f074ffc15a8e7c3f082d] Merge tag 'libnvdimm-for-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
git bisect bad 75f95da078b2891cd186f074ffc15a8e7c3f082d
# bad: [0e9da3fbf7d81f0f913b491c8de1ba7883d4f217] Merge tag 'for-4.21/block-20181221' of git://git.kernel.dk/linux-block
git bisect bad 0e9da3fbf7d81f0f913b491c8de1ba7883d4f217
# good: [b12a9124eeb71d766a3e3eb594ebbb3fefc66902] Merge tag 'y2038-for-4.21' of ssh://gitolite.kernel.org:/pub/scm/linux/kernel/git/arnd/playground
git bisect good b12a9124eeb71d766a3e3eb594ebbb3fefc66902
# bad: [c6d962aebaf8ec5d867aac09ee33e3f528c2539d] nvme-pci: only allow polling with separate poll queues
git bisect bad c6d962aebaf8ec5d867aac09ee33e3f528c2539d
# bad: [511c49fe1804671800947b69281e07719fad25e2] fnic: fix fnic_scsi_host_{start,end}_tag
git bisect bad 511c49fe1804671800947b69281e07719fad25e2
# good: [3110fc79606fb6003949246c6fb325dd43445273] blk-mq: improve plug list sorting
git bisect good 3110fc79606fb6003949246c6fb325dd43445273
# good: [7baa85727d0406ffd2b2303cd803a145aa35c505] blk-mq-tag: change busy_iter_fn to return whether to continue or not
git bisect good 7baa85727d0406ffd2b2303cd803a145aa35c505
# good: [55c7bc37e05b5f7593b76d1c74e254b996b73d1a] mtip32xx: remove mtip_get_int_command
git bisect good 55c7bc37e05b5f7593b76d1c74e254b996b73d1a
# bad: [785ba83b4f3e4fde236f03205dd1cd98fd6a5255] scsi: push blk_status_t up into scsi_setup_{fs,scsi}_cmnd
git bisect bad 785ba83b4f3e4fde236f03205dd1cd98fd6a5255
# bad: [9d037ad707ed6069fbea4e38e6ee37e027b13f1d] block: remove req->timeout_list
git bisect bad 9d037ad707ed6069fbea4e38e6ee37e027b13f1d
# good: [27d420bc475e68c85d567d96caf215999d76fd16] mtip32xxx: use for_each_sg
git bisect good 27d420bc475e68c85d567d96caf215999d76fd16
# first bad commit: [9d037ad707ed6069fbea4e38e6ee37e027b13f1d] block: remove req->timeout_list
# good: [27d420bc475e68c85d567d96caf215999d76fd16] mtip32xxx: use for_each_sg
git bisect good 27d420bc475e68c85d567d96caf215999d76fd16
# first bad commit: [9d037ad707ed6069fbea4e38e6ee37e027b13f1d] block: remove req->timeout_list