Re: [PATCH v2] dmaengine: idxd: add knob for enqcmds retries

From
Vinod Koul <vkoul@kernel.org>
Date
2021-12-13 06:42:05
Reply to
Dave Jiang, 2021-11-29
On 29-11-21, 10:19, Dave Jiang wrote:
Add a sysfs knob to allow tuning of retries for the kernel ENQCMDS
descriptor submission. While on host, it is not as likely that ENQCMDS
return busy during normal operations due to the driver controlling the
number of descriptors allocated for submission. However, when the driver is
operating as a guest driver, the chance of retry goes up significantly due
to sharing a wq with multiple VMs. A default value is provided with the
system admin being able to tune the value on a per WQ basis.
Applied, thanks

-- 
~Vinod
Thread (2 messages) 2 messages, 2 authors, last reply 2021-12-13
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