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| author | Jon Pan-Doh <pandoh@google.com> | 2025-05-23 02:21:25 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2025-05-23 19:11:45 +0300 |
| commit | 24816cc298ee9cc01003b10b888427faada4403d (patch) | |
| tree | 776718a60925466a03a2c5d1c7d7a72f7d409af7 | |
| parent | a57f2bfb4a5863f83087867c0e671f2418212d23 (diff) | |
| download | linux-24816cc298ee9cc01003b10b888427faada4403d.tar.xz | |
PCI/AER: Add ratelimits to PCI AER Documentation
Add ratelimits section for rationale and defaults.
[bhelgaas: note fatal errors are not ratelimited]
Signed-off-by: Karolina Stolarek <karolina.stolarek@oracle.com>
Signed-off-by: Jon Pan-Doh <pandoh@google.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Link: https://patch.msgid.link/20250522232339.1525671-20-helgaas@kernel.org
| -rw-r--r-- | Documentation/PCI/pcieaer-howto.rst | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/PCI/pcieaer-howto.rst b/Documentation/PCI/pcieaer-howto.rst index f013f3b27c82..6fb31516fff1 100644 --- a/Documentation/PCI/pcieaer-howto.rst +++ b/Documentation/PCI/pcieaer-howto.rst @@ -85,6 +85,18 @@ In the example, 'Requester ID' means the ID of the device that sent the error message to the Root Port. Please refer to PCIe specs for other fields. +AER Ratelimits +-------------- + +Since error messages can be generated for each transaction, we may see +large volumes of errors reported. To prevent spammy devices from flooding +the console/stalling execution, messages are throttled by device and error +type (correctable vs. non-fatal uncorrectable). Fatal errors, including +DPC errors, are not ratelimited. + +AER uses the default ratelimit of DEFAULT_RATELIMIT_BURST (10 events) over +DEFAULT_RATELIMIT_INTERVAL (5 seconds). + AER Statistics / Counters ------------------------- |