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Groups > linux.kernel > #1305377
| From | Andy Lutomirski <luto@amacapital.net> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v8 3/3] x86, mce: Add __mcsafe_copy() |
| Date | 2016-01-09 23:40 +0100 |
| Message-ID | <qPakW-3yt-15@gated-at.bofh.it> (permalink) |
| References | (2 earlier) <qOQPf-6LO-7@gated-at.bofh.it> <qP5Oi-od-1@gated-at.bofh.it> <qP5XX-rn-1@gated-at.bofh.it> <qP7Gq-1HI-3@gated-at.bofh.it> <qPa1B-3rw-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Sat, Jan 9, 2016 at 2:15 PM, Dan Williams <dan.j.williams@intel.com> wrote: > On Sat, Jan 9, 2016 at 11:39 AM, Tony Luck <tony.luck@gmail.com> wrote: >> On Sat, Jan 9, 2016 at 9:57 AM, Andy Lutomirski <luto@amacapital.net> wrote: >>> On Sat, Jan 9, 2016 at 9:48 AM, Tony Luck <tony.luck@gmail.com> wrote: >>>> ERMS? >>> >>> It's the fast string extension, aka Enhanced REP MOV STOS. On CPUs >>> with that feature (and not disabled via MSR), plain ol' rep movs is >>> the fastest way to copy bytes. I think this includes all Intel CPUs >>> from SNB onwards. >> >> Ah ... very fast at copying .. but currently not machine check recoverable. > > Hmm, I assume for the pmem driver I'll want to check at runtime if the > cpu has machine check recovery and fall back to the faster copy if > it's not available? Shouldn't that logic live in the mcsafe_copy routine itself rather than being delegated to callers? --Andy
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[PATCH v8 3/3] x86, mce: Add __mcsafe_copy() Tony Luck <tony.luck@intel.com> - 2016-01-09 01:20 +0100
Re: [PATCH v8 3/3] x86, mce: Add __mcsafe_copy() Andy Lutomirski <luto@amacapital.net> - 2016-01-09 02:50 +0100
Re: [PATCH v8 3/3] x86, mce: Add __mcsafe_copy() Tony Luck <tony.luck@gmail.com> - 2016-01-09 18:50 +0100
Re: [PATCH v8 3/3] x86, mce: Add __mcsafe_copy() Andy Lutomirski <luto@amacapital.net> - 2016-01-09 19:00 +0100
Re: [PATCH v8 3/3] x86, mce: Add __mcsafe_copy() Tony Luck <tony.luck@gmail.com> - 2016-01-09 20:50 +0100
Re: [PATCH v8 3/3] x86, mce: Add __mcsafe_copy() Dan Williams <dan.j.williams@intel.com> - 2016-01-09 23:20 +0100
Re: [PATCH v8 3/3] x86, mce: Add __mcsafe_copy() Andy Lutomirski <luto@amacapital.net> - 2016-01-09 23:40 +0100
Re: [PATCH v8 3/3] x86, mce: Add __mcsafe_copy() Dan Williams <dan.j.williams@intel.com> - 2016-01-10 01:30 +0100
Re: [PATCH v8 3/3] x86, mce: Add __mcsafe_copy() Tony Luck <tony.luck@gmail.com> - 2016-01-10 02:50 +0100
Re: [PATCH v8 3/3] x86, mce: Add __mcsafe_copy() Borislav Petkov <bp@alien8.de> - 2016-01-10 12:30 +0100
Re: [PATCH v8 3/3] x86, mce: Add __mcsafe_copy() Ingo Molnar <mingo@kernel.org> - 2016-01-11 11:50 +0100
Re: [PATCH v8 3/3] x86, mce: Add __mcsafe_copy() Tony Luck <tony.luck@gmail.com> - 2016-01-14 00:30 +0100
Re: [PATCH v8 3/3] x86, mce: Add __mcsafe_copy() Borislav Petkov <bp@alien8.de> - 2016-01-14 05:50 +0100
Re: [PATCH v8 3/3] x86, mce: Add __mcsafe_copy() "Luck, Tony" <tony.luck@intel.com> - 2016-01-12 01:30 +0100
Re: [PATCH v8 3/3] x86, mce: Add __mcsafe_copy() Andy Lutomirski <luto@amacapital.net> - 2016-01-12 01:40 +0100
Re: [PATCH v8 3/3] x86, mce: Add __mcsafe_copy() Andy Lutomirski <luto@amacapital.net> - 2016-01-12 01:40 +0100
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