| commit | 2ce02a864ac1a2bf99baeb20d38100d2cc413ac2 | [log] [tgz] |
|---|---|---|
| author | Jiang Biao <benbjiang@tencent.com> | Mon Aug 24 13:20:25 2020 +0800 |
| committer | Bjorn Helgaas <bhelgaas@google.com> | Thu Sep 17 12:21:46 2020 -0500 |
| tree | c7215e9b59586a26ff2b58f754a0fbfe0af87363 | |
| parent | d24e124577cdb47824c6665af16250807c2daa89 [diff] |
PCI: Add schedule point in pci_read_config() The PCI sysfs "config" file allows large reads, and the resulting PCI config reads can take several milliseconds to complete. Testing with the cyclictest [1] benchmark showed 5ms+ latencies. Add a schedule point in pci_read_config() to reduce the maximum latency. [1] https://git.kernel.org/pub/scm/linux/kernel/git/clrkwllms/rt-tests.git/ [bhelgaas: commit log] Link: https://lore.kernel.org/r/20200824052025.48362-1-benbjiang@tencent.com Reported-by: Bin Lai <robinlai@tencent.com> Signed-off-by: Jiang Biao <benbjiang@tencent.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>