Re: [PATCH v11 03/16] block/mq-deadline: Only use zone locking if necessary

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 23/08/22 12:16PM, Bart Van Assche wrote:
Measurements have shown that limiting the queue depth to one per zone for
zoned writes has a significant negative performance impact on zoned UFS
devices. Hence this patch that disables zone locking by the mq-deadline
scheduler if the storage controller preserves the command order. This
patch is based on the following assumptions:
- It happens infrequently that zoned write requests are reordered by the
 block layer.
- The I/O priority of all write requests is the same per zone.
- Either no I/O scheduler is used or an I/O scheduler is used that
 serializes write requests per zone.

Reviewed-by: Damien Le Moal <dlemoal@xxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Ming Lei <ming.lei@xxxxxxxxxx>
Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
---
block/mq-deadline.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)


Reviewed-by: Nitesh Shetty <nj.shetty@xxxxxxxxxxx>





[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [SCSI Target Devel]     [Linux SCSI Target Infrastructure]     [Kernel Newbies]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Linux IIO]     [Samba]     [Device Mapper]

  Powered by Linux