Searched hist:"526 d10061bc29b314cc41f3b8322606df9172f14" (Results 1 – 2 of 2) sorted by relevance
| /openbmc/linux/drivers/md/ |
| H A D | dm-core.h | diff 526d10061bc29b314cc41f3b8322606df9172f14 Mon Jun 12 20:33:32 CDT 2023 Li Nan <linan122@huawei.com> dm: support turning off block-core's io stats accounting
Commit bc58ba9468d9 ("block: add sysfs file for controlling io stats
accounting") allowed users to turn off disk stat accounting completely
by checking if queue flag QUEUE_FLAG_IO_STAT is set. In dm, this flag
is neither set nor checked: so block-core's io stats are continuously
counted and cannot be turned off.
Add support for turning off block-core's io stats accounting for dm.
Set QUEUE_FLAG_IO_STAT for dm's request_queue. If QUEUE_FLAG_IO_STAT
is set when an io starts, record the need for block core's io stats by
setting the DM_IO_BLK_STAT dm_io flag to avoid io stats being disabled
in the middle of the io.
DM statistics (dm-stats) is independent of block-core's io stats and
remains unchanged.
Signed-off-by: Li Nan <linan122@huawei.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
|
| H A D | dm.c | diff 526d10061bc29b314cc41f3b8322606df9172f14 Mon Jun 12 20:33:32 CDT 2023 Li Nan <linan122@huawei.com> dm: support turning off block-core's io stats accounting
Commit bc58ba9468d9 ("block: add sysfs file for controlling io stats
accounting") allowed users to turn off disk stat accounting completely
by checking if queue flag QUEUE_FLAG_IO_STAT is set. In dm, this flag
is neither set nor checked: so block-core's io stats are continuously
counted and cannot be turned off.
Add support for turning off block-core's io stats accounting for dm.
Set QUEUE_FLAG_IO_STAT for dm's request_queue. If QUEUE_FLAG_IO_STAT
is set when an io starts, record the need for block core's io stats by
setting the DM_IO_BLK_STAT dm_io flag to avoid io stats being disabled
in the middle of the io.
DM statistics (dm-stats) is independent of block-core's io stats and
remains unchanged.
Signed-off-by: Li Nan <linan122@huawei.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
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