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| author |   Yijing Wang <wangyijing@huawei.com> | 2013-08-26 16:33:06 +0800 |
|---|---|---|
| committer |   Bjorn Helgaas <bhelgaas@google.com> | 2013-08-26 14:49:28 -0600 |
| commit | 5895af79158a55562753f7f05762f3bd766d32b9 (patch) | |
| tree | 39eecfd0c9fa8c4963ec081ea171977e05b5b0b9 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | PCI: Fix MPS peer-to-peer DMA comment syntax (diff) | |
| download | linux-dev-5895af79158a55562753f7f05762f3bd766d32b9.tar.xz linux-dev-5895af79158a55562753f7f05762f3bd766d32b9.zip | |
PCI: Warn if unsafe MPS settings detected
If a BIOS configures MPS incorrectly, devices may not work normally.
For example, if a bridge has MPS set larger than an endpoint below it,
the endpoint may discard packets.
To help diagnose this issue, print a warning if we find an endpoint
MPS setting different than that of the upstream bridge.
[bhelgaas: changelog, "bridge" temporary, warning text]
Reference: https://bugzilla.kernel.org/show_bug.cgi?id=60799
Reported-by: Joe Jin <joe.jin@oracle.com>
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Jon Mason <jdmason@kudzu.us>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions