Hi Mitsuhiro,
On 04/11/2013 08:51 PM, Mitsuhiro Tanino wrote:
(2013/04/11 12:53), Simon Jeons wrote:
One question against mce instead of the patchset. ;-)
When check memory is bad? Before memory access? Is there a process scan it
period?
Hi Simon-san,
Yes, there is a process to scan memory periodically.
At Intel Nehalem-EX and CPUs after Nehalem-EX generation, MCA recovery
is supported. MCA recovery provides error detection and isolation
features to work together with OS.
One of the MCA Recovery features is Memory Scrubbing. It periodically
checks memory in the background of OS.
Memory Scrubbing is a kernel thread? Where is the codes of memory scrubbing?
If Memory Scrubbing find an uncorrectable error on a memory before
OS accesses the memory bit, MCA recovery notifies SRAO error into OS
It maybe can't find memory error timely since it is sleeping when memory
error occur, can this case happened?
and OS handles the SRAO error using hwpoison function.
Regards,
Mitsuhiro Tanino
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