Messages in this thread | | | Date | Fri, 27 Nov 2015 11:16:11 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH 3/3] x86, ras: Add mcsafe_memcpy() function to recover from machine checks |
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* Luck, Tony <tony.luck@intel.com> wrote:
> On Thu, Nov 12, 2015 at 08:53:13AM +0100, Ingo Molnar wrote: > > > +extern phys_addr_t mcsafe_memcpy(void *dst, const void __user *src, > > > + unsigned size); > > > > So what's the longer term purpose, where will mcsafe_memcpy() be used? > > The initial plan is to use this for file systems backed by NVDIMMs. They will > have a large amount of memory, and we have a practical recovery path - return > -EIO just like legacy h/w. > > We can look for other places in the kernel where we read large amounts of memory > and have some idea how to recover if the memory turns out to be bad.
I see, that's sensible!
Thanks,
Ingo
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