lkml.org 
[lkml]   [2019]   [Apr]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH] Revert "PCI/LINK: Report degraded links via link bandwidth
Date
Alex W. reported a case where the new link bandwidth notification logging,
e.g.:

vfio-pci 0000:07:00.0: 32.000 Gb/s available PCIe bandwidth, limited by 2.5 GT/s x16 link at 0000:00:02.0 (capable of 64.000 Gb/s with 5 GT/s x16 link)

is somewhat surprising. The message is great if link bandwidth was reduced
because of a hardware problem, but in this case it's caused by a GPU doing
link state management to conserve power, so the message is to be expected
and is likely to confuse the user.

We haven't figured out a good way to handle both the "hardware failure" and
the "active link management" cases yet, so revert this for now.

Bjorn

\
 
 \ /
  Last update: 2019-04-29 20:57    [W:0.094 / U:0.024 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site