Re: [PATCH v2] PCI: Reduce delay after FLR of Microsoft MANA devices

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri, May 30, 2025 at 09:26:16AM -0700, Graham Whyte wrote:
> On 5/29/2025 3:34 AM, Lukas Wunner wrote:
> > On Wed, May 28, 2025 at 06:10:47PM +0000, grwhyte@xxxxxxxxxxxxxxxxxxx wrote:
> > > Add a device-specific reset for Microsoft MANA devices with the FLR
> > > delay reduced from 100ms to 10ms. While this is not compliant with the
> > > pci spec, these devices safely complete the FLR much quicker than 100ms
> > > and this can be reduced to optimize certain scenarios
> > 
> > How often do you reset these devices that 90 msec makes a difference?
> > What are these "certain scenarios"?
> 
> VF removal and rescan is the main scenario for runtime repairs and driver
> updates.
> Doing this on scale with 100ms adds up to significant time across multiple
> VFs.

Please mention this in the commit message to avoid head-scratching
by someone reading it down the road.

Thanks,

Lukas




[Index of Archives]     [DMA Engine]     [Linux Coverity]     [Linux USB]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [Greybus]

  Powered by Linux