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Groups > linux.kernel > #1593384
| From | Borislav Petkov <bp@suse.de> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: Question Regarding ERMS memcpy |
| Date | 2017-03-06 15:10 +0100 |
| Message-ID | <ti1uQ-Rx-71@gated-at.bofh.it> (permalink) |
| References | (5 earlier) <thK0V-4SA-3@gated-at.bofh.it> <thKNk-5sV-3@gated-at.bofh.it> <thUWm-4mz-7@gated-at.bofh.it> <ti11M-rk-13@gated-at.bofh.it> <ti1bs-uP-33@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Mon, Mar 06, 2017 at 05:41:22AM -0800, hpa@zytor.com wrote:
> It isn't really that straightforward IMO.
>
> For UC memory transaction size really needs to be specified explicitly
> at all times and should be part of the API, rather than implicit.
>
> For WC/WT/WB device memory, the ordinary memcpy is valid and
> preferred.
I'm practically partially reverting
6175ddf06b61 ("x86: Clean up mem*io functions.")
Are you saying, this was wrong before too?
Maybe it was wrong, strictly speaking, but maybe that was good enough
for our purposes...
--
Regards/Gruss,
Boris.
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--
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Question Regarding ERMS memcpy Logan Gunthorpe <logang@deltatee.com> - 2017-03-04 22:20 +0100
Re: Question Regarding ERMS memcpy Borislav Petkov <bp@suse.de> - 2017-03-04 23:50 +0100
Re: Question Regarding ERMS memcpy hpa@zytor.com - 2017-03-05 01:00 +0100
Re: Question Regarding ERMS memcpy Borislav Petkov <bp@suse.de> - 2017-03-05 01:20 +0100
Re: Question Regarding ERMS memcpy hpa@zytor.com - 2017-03-05 01:30 +0100
Re: Question Regarding ERMS memcpy Borislav Petkov <bp@suse.de> - 2017-03-05 01:40 +0100
Re: Question Regarding ERMS memcpy hpa@zytor.com - 2017-03-05 02:00 +0100
Re: Question Regarding ERMS memcpy Borislav Petkov <bp@suse.de> - 2017-03-05 11:00 +0100
Re: Question Regarding ERMS memcpy Borislav Petkov <bp@suse.de> - 2017-03-05 12:20 +0100
Re: Question Regarding ERMS memcpy Borislav Petkov <bp@suse.de> - 2017-03-05 14:10 +0100
Re: Question Regarding ERMS memcpy Linus Torvalds <torvalds@linux-foundation.org> - 2017-03-05 20:30 +0100
Re: Question Regarding ERMS memcpy Borislav Petkov <bp@suse.de> - 2017-03-05 21:20 +0100
Re: Question Regarding ERMS memcpy Linus Torvalds <torvalds@linux-foundation.org> - 2017-03-05 21:20 +0100
Re: Question Regarding ERMS memcpy Logan Gunthorpe <logang@deltatee.com> - 2017-03-06 08:10 +0100
Re: Question Regarding ERMS memcpy "H. Peter Anvin" <hpa@zytor.com> - 2017-03-06 08:40 +0100
Re: Question Regarding ERMS memcpy Logan Gunthorpe <logang@deltatee.com> - 2017-03-06 18:50 +0100
Re: Question Regarding ERMS memcpy hpa@zytor.com - 2017-03-06 20:10 +0100
Re: Question Regarding ERMS memcpy Borislav Petkov <bp@suse.de> - 2017-03-06 14:40 +0100
Re: Question Regarding ERMS memcpy hpa@zytor.com - 2017-03-06 14:50 +0100
Re: Question Regarding ERMS memcpy Borislav Petkov <bp@suse.de> - 2017-03-06 15:10 +0100
Re: Question Regarding ERMS memcpy Logan Gunthorpe <logang@deltatee.com> - 2017-03-05 06:00 +0100
Re: Question Regarding ERMS memcpy Borislav Petkov <bp@suse.de> - 2017-03-05 11:00 +0100
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