Messages in this thread | | | From | Borislav Petkov <> | Subject | [RFC PATCH 0/3] RAS: Use MCE tracepoint for decoded MCEs | Date | Tue, 28 Feb 2012 17:11:24 +0100 |
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From: Borislav Petkov <borislav.petkov@amd.com>
Hi all,
this is an initial, more or less serious attempt to collect decoded MCE info into a buffer and jettison it into userspace using the MCE tracepoint trace_mce_record(). This initial approach needs userspace to do
$ echo 1 > /sys/devices/system/ras/agent
and decoded MCE info gets collected into a buffer which enlarges itself to accomodate differently-sized error messages. Then, when decoding is finished, the tracepoint is called and the MCE info along with the decoded information lands in the ring buffer and at possible userspace consumers.
Also, the commit messages of the single patches contain additional info.
For example, the data looks like this:
mcegen.py-2318 [001] .N.. 580.902409: mce_record: [Hardware Error]: CPU:0 MC4_STATUS[Over|CE|-|PCC|AddrV|CECC]: 0xd604c00006080a41 MC4_ADDR: 0x0000000000000016 [Hardware Error]: Northbridge Error (node 0): DRAM ECC error detected on the NB. [Hardware Error]: ERR_ADDR: 0x16 row: 0, channel: 0 [Hardware Error]: cache level: L1, mem/io: MEM, mem-tx: DWR, part-proc: RES (no timeout) [Hardware Error]: CPU: 0, MCGc/s: 0/0, MC4: d604c00006080a41, ADDR/MISC: 0000000000000016/dead57ac1ba0babe, RIP: 00:<0000000000000000>, TSC: 0, TIME: 0)
mcegen.py-2326 [001] .N.. 598.795494: mce_record: [Hardware Error]: CPU:0 MC4_STATUS[Over|UE|MiscV|PCC|-|UECC]: 0xfa002000001c011b [Hardware Error]: Northbridge Error (node 0): L3 ECC data cache error. [Hardware Error]: cache level: L3/GEN, tx: GEN, mem-tx: RD [Hardware Error]: CPU: 0, MCGc/s: 0/0, MC4: fa002000001c011b, ADDR/MISC: 0000000000000016/dead57ac1ba0babe, RIP: 00:<0000000000000000>, TSC: 0, TIME: 0)
mcegen.py-2343 [013] .N.. 619.620698: mce_record: [Hardware Error]: CPU:0 MC4_STATUS[-|UE|MiscV|PCC|-|UECC]: 0xba002100000f001b[HardwareError]: Northbridge Error (node 0): GART Table Walk data error. [Hardware Error]: cache level: L3/GEN, tx: GEN [Hardware Error]: CPU: 0, MCGc/s: 0/0, MC4: ba002100000f001b, ADDR/MISC: 0000000000000016/dead57ac1ba0babe, RIP: 00:<0000000000000000>, TSC: 0, TIME: 0)
As always, reviews and comments are welcome.
Thanks.
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