linux-kernel - RE: [PATCHV2 3/3] x86, ras: Add mcsafe_memcpy() function to recover from machine checks

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Date:	Fri, 11 Dec 2015 22:45:33 +0000
From:	"Luck, Tony" <tony.luck@...el.com>
To:	Andy Lutomirski <luto@...capital.net>
CC:	"Williams, Dan J" <dan.j.williams@...el.com>,
	Ingo Molnar <mingo@...nel.org>, Borislav Petkov <bp@...en8.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andy Lutomirski <luto@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	linux-nvdimm <linux-nvdimm@...1.01.org>, X86 ML <x86@...nel.org>
Subject: RE: [PATCHV2 3/3] x86, ras: Add mcsafe_memcpy() function to recover
 from machine checks

>> But a machine check safe copy_from_user() would be useful
>> current generation cpus that broadcast all the time.
>
> Fair enough.

Thanks for spending the time to look at this.  Coaxing me to re-write the
tail of do_machine_check() has made that code much better. Too many
years of one patch on top of another without looking at the whole context.

Cogitate on this series over the weekend and see if you can give me
an Acked-by or Reviewed-by (I'll be adding a #define for BIT(63)).

-Tony