From: Vinod Koul <vkoul@kernel.org>
To: Dave Jiang <dave.jiang@intel.com>
Cc: Sanjay Kumar <sanjay.k.kumar@intel.com>, dmaengine@vger.kernel.org
Subject: Re: [PATCH v2] dmaengine: idxd: add knob for enqcmds retries
Date: Mon, 13 Dec 2021 12:11:57 +0530 [thread overview]
Message-ID: <YbbrNeapx5GV1Bfa@matsya> (raw)
In-Reply-To: <163820629464.2702134.7577370098568297574.stgit@djiang5-desk3.ch.intel.com>
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
prev parent reply other threads:[~2021-12-13 6:42 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-29 17:19 [PATCH v2] dmaengine: idxd: add knob for enqcmds retries Dave Jiang
2021-12-13 6:41 ` Vinod Koul [this message]
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