Messages in this thread | | | Date | Thu, 11 Apr 2013 21:00:46 +0800 | From | Ric Mason <> | Subject | Re: [RFC Patch 0/2] mm: Add parameters to make kernel behavior at memory error on dirty cache selectable |
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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 > > -- > To unsubscribe, send a message with 'unsubscribe linux-mm' in > the body to majordomo@kvack.org. For more info on Linux MM, > see: http://www.linux-mm.org/ . > Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
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