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authorMing Lei <ming.lei@redhat.com>2019-07-25 12:41:46 +0300
committerJens Axboe <axboe@kernel.dk>2019-08-05 06:43:12 +0300
commit556f36e90dbe7dded81f4fac084d2bc8a2458330 (patch)
treed8e04c7dfcdf85432ca737c35250a23091c869a2 /drivers/lightnvm
parentb7e9e1fb7a9227be34ad4a5e778022c3164494cf (diff)
downloadlinux-556f36e90dbe7dded81f4fac084d2bc8a2458330.tar.xz
blk-mq: balance mapping between present CPUs and queues
Spread queues among present CPUs first, then building mapping on other non-present CPUs. So we can minimize count of dead queues which are mapped by un-present CPUs only. Then bad IO performance can be avoided by unbalanced mapping between present CPUs and queues. The similar policy has been applied on Managed IRQ affinity. Cc: Yi Zhang <yi.zhang@redhat.com> Reported-by: Yi Zhang <yi.zhang@redhat.com> Reviewed-by: Bob Liu <bob.liu@oracle.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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