linux-stable/drivers/pci/pcie
Bjorn Helgaas d49f86e888 PCI/LINK: Remove bandwidth notification
[ Upstream commit b4c7d2076b ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-17 17:06:24 +01:00
..
aer.c pci-v5.9-changes 2020-08-07 18:48:15 -07:00
aer_inject.c PCI: Replace http:// links with https:// 2020-06-30 13:05:09 -05:00
aspm.c PCI/ASPM: Remove struct pcie_link_state.l1ss 2020-10-16 11:21:19 -05:00
dpc.c PCI: pciehp: Reduce noisiness on hot removal 2020-09-17 16:22:36 -05:00
edr.c PCI/EDR: Log only ACPI_NOTIFY_DISCONNECT_RECOVER events 2020-04-24 18:33:29 -05:00
err.c PCI/ERR: Clear PCIe Device Status errors only if OS owns AER 2020-07-22 15:41:03 -05:00
Kconfig PCI/LINK: Remove bandwidth notification 2021-03-17 17:06:24 +01:00
Makefile PCI/LINK: Remove bandwidth notification 2021-03-17 17:06:24 +01:00
pme.c PCI/PME: Fix kernel-doc of pcie_pme_resume() and pcie_pme_remove() 2020-05-21 15:04:45 -05:00
portdrv.h PCI/LINK: Remove bandwidth notification 2021-03-17 17:06:24 +01:00
portdrv_core.c PCI/ERR: Remove service dependency in pcie_do_recovery() 2020-03-28 13:18:54 -05:00
portdrv_pci.c PCI/LINK: Remove bandwidth notification 2021-03-17 17:06:24 +01:00
ptm.c PCI/PTM: Inherit Switch Downstream Port PTM settings from Upstream Port 2020-05-21 15:53:07 -05:00