From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Michael Kelley <mikelley@microsoft.com>
Cc: KY Srinivasan <kys@microsoft.com>,
"martin.petersen\@oracle.com" <martin.petersen@oracle.com>,
Long Li <longli@microsoft.com>,
"James.Bottomley\@hansenpartnership.com"
<James.Bottomley@hansenpartnership.com>,
"emilne\@redhat.com" <emilne@redhat.com>,
"linux-hyperv\@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
"linux-kernel\@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-scsi\@vger.kernel.org" <linux-scsi@vger.kernel.org>
Subject: Re: [PATCH 1/1] scsi: storvsc: Reduce default ring buffer size to 128 Kbytes
Date: Wed, 03 Apr 2019 23:31:39 -0400 [thread overview]
Message-ID: <yq14l7etpic.fsf@oracle.com> (raw)
In-Reply-To: <1554154871-10305-1-git-send-email-mikelley@microsoft.com> (Michael Kelley's message of "Mon, 1 Apr 2019 21:42:06 +0000")
Michael,
> Reduce the default VMbus channel ring buffer size for storvsc SCSI
> devices from 1 Mbyte to 128 Kbytes. Measurements show that ring buffer
> sizes above 128 Kbytes do not increase performance even at very high
> IOPS rates, so don't waste the memory. Also remove the dependence on
> PAGE_SIZE, since the ring buffer size should not change on
> architectures where PAGE_SIZE is not 4 Kbytes.
Applied to 5.1/scsi-fixes, thanks.
--
Martin K. Petersen Oracle Linux Engineering
prev parent reply other threads:[~2019-04-04 3:31 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-01 21:42 [PATCH 1/1] scsi: storvsc: Reduce default ring buffer size to 128 Kbytes Michael Kelley
2019-04-02 15:58 ` Haiyang Zhang
2019-04-04 3:31 ` Martin K. Petersen [this message]
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