diff options
| author | Bjorn Helgaas <bhelgaas@google.com> | 2021-02-02 14:17:54 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2021-02-02 14:25:11 -0600 |
| commit | b4c7d2076b4e767dd2e075a2b3a9e57753fc67f5 (patch) | |
| tree | a89a1b6f286f708d5fa97f5953e2c63e2d174db9 /drivers/pci/pcie/Kconfig | |
| parent | 7c53f6b671f4aba70ff15e1b05148b10d58c2837 (diff) | |
PCI/LINK: Remove bandwidth notification
The PCIe Bandwidth Change Notification feature logs messages when the link
bandwidth changes. Some users have reported that these messages occur
often enough to significantly reduce NVMe performance. GPUs also seem to
generate these messages.
We don't know why the link bandwidth changes, but in the reported cases
there's no indication that it's caused by hardware failures.
Remove the bandwidth change notifications for now. Hopefully we can add
this back when we have a better understanding of why this happens and how
we can make the messages useful instead of overwhelming.
Link: https://lore.kernel.org/r/20200115221008.GA191037@google.com/
Link: https://lore.kernel.org/r/155605909349.3575.13433421148215616375.stgit@gimli.home/
Link: https://bugzilla.kernel.org/show_bug.cgi?id=206197
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/pcie/Kconfig')
| -rw-r--r-- | drivers/pci/pcie/Kconfig | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/drivers/pci/pcie/Kconfig b/drivers/pci/pcie/Kconfig index 3946555a6042..45a2ef702b45 100644 --- a/drivers/pci/pcie/Kconfig +++ b/drivers/pci/pcie/Kconfig @@ -133,14 +133,6 @@ config PCIE_PTM This is only useful if you have devices that support PTM, but it is safe to enable even if you don't. -config PCIE_BW - bool "PCI Express Bandwidth Change Notification" - depends on PCIEPORTBUS - help - This enables PCI Express Bandwidth Change Notification. If - you know link width or rate changes occur only to correct - unreliable links, you may answer Y. - config PCIE_EDR bool "PCI Express Error Disconnect Recover support" depends on PCIE_DPC && ACPI |