Re: [PATCH] scsi: storvsc: Ratelimit warning logs to prevent VM denial of service

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To: Easwar Hariharan <eahariha@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [PATCH] scsi: storvsc: Ratelimit warning logs to prevent VM denial of service
From: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>
Date: Fri, 10 Jan 2025 16:24:02 -0500
Cc: "K. Y. Srinivasan" <kys@xxxxxxxxxxxxx>, Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>, Wei Liu <wei.liu@xxxxxxxxxx>, Dexuan Cui <decui@xxxxxxxxxxxxx>, Long Li <longli@xxxxxxxxxxxxxxxxxxx>, Long Li <longli@xxxxxxxxxxxxx>, "James E.J. Bottomley" <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>, "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>, Mitchell Levy <levymitchell0@xxxxxxxxx>, Mitchell Levy <mitchelllevy@xxxxxxxxxxxxxxxxxxx>, linux-hyperv@xxxxxxxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Vijay Balakrishna <vijayb@xxxxxxxxxxxxxxxxxxx>
In-reply-to: <20250107-eahariha-ratelimit-storvsc-v1-1-7fc193d1f2b0@linux.microsoft.com> (Easwar Hariharan's message of "Tue, 07 Jan 2025 17:28:40 +0000")
Organization: Oracle Corporation

Easwar,

> If there's a persistent error in the hypervisor, the scsi warning for
> failed IO can flood the kernel log and max out CPU utilization,
> preventing troubleshooting from the VM side. Ratelimit the warning so
> it doesn't DOS the VM.

Applied to 6.14/scsi-staging, thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering

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References:
- [PATCH] scsi: storvsc: Ratelimit warning logs to prevent VM denial of service
  - From: Easwar Hariharan

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