Re: [PATCH 6.6.y] scsi: storvsc: Ratelimit warning logs to prevent VM denial of service

[Easwar Hariharan <eahariha@linux.microsoft.com>]

On 1/27/2025 9:34 PM, Greg KH wrote:
> On Mon, Jan 27, 2025 at 11:25:17AM -0800, Easwar Hariharan wrote:
>> On 1/27/2025 10:29 AM, Easwar Hariharan wrote:
>>> commit d2138eab8cde61e0e6f62d0713e45202e8457d6d upstream
>>>
>>> If there's a persistent error in the hypervisor, the SCSI warning for
>>> failed I/O 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.
>>>
>>> Closes: https://github.com/microsoft/WSL/issues/9173
>>> Signed-off-by: Easwar Hariharan <eahariha@linux.microsoft.com>
>>> Link: https://lore.kernel.org/r/20250107-eahariha-ratelimit-storvsc-v1-1-7fc193d1f2b0@linux.microsoft.com
>>> Reviewed-by: Michael Kelley <mhklinux@outlook.com>
>>> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
>>> Signed-off-by: Easwar Hariharan <eahariha@linux.microsoft.com>
>>> ---
>>>  drivers/scsi/storvsc_drv.c | 8 +++++++-
>>>  1 file changed, 7 insertions(+), 1 deletion(-)
>>>
>>
>> I just remembered that we should wait for Linus to tag the rc before
>> sending backports, so apologies for sending this (and its 6.1 and 6.12
>> friends) out before rc1 was tagged.
> 
> Why was this not tagged for stable in the first place?
> 
> thanks,
> 
> greg k-h

An oversight when I sent the original patch.

- Easwar (he/him)