Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1305398
| From | Dan Williams <dan.j.williams@intel.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v8 3/3] x86, mce: Add __mcsafe_copy() |
| Date | 2016-01-10 01:30 +0100 |
| Message-ID | <qPc3o-4Mp-1@gated-at.bofh.it> (permalink) |
| References | (3 earlier) <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> <qPakW-3yt-15@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Sat, Jan 9, 2016 at 2:33 PM, Andy Lutomirski <luto@amacapital.net> wrote: > 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? > Yes, please.
Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
[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
csiph-web