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Groups > linux.kernel > #1592972

Re: Question Regarding ERMS memcpy

From "H. Peter Anvin" <hpa@zytor.com>
Newsgroups linux.kernel
Subject Re: Question Regarding ERMS memcpy
Date 2017-03-06 08:40 +0100
Message-ID <thVpn-4FY-7@gated-at.bofh.it> (permalink)
References (7 earlier) <thsGJ-vv-1@gated-at.bofh.it> <thB7k-6NF-3@gated-at.bofh.it> <thK0V-4SA-3@gated-at.bofh.it> <thKNk-5sV-3@gated-at.bofh.it> <thUWm-4mz-7@gated-at.bofh.it>
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On 03/05/17 23:01, Logan Gunthorpe wrote:
> 
> On 05/03/17 12:54 PM, Borislav Petkov wrote:
>> Logan, wanna give that a try, see if it takes care of your issue?
> 
> Well honestly my issue was solved by fixing my kernel config. I have no
> idea why I had optimize for size in there in the first place.
> 

Yes, to gcc "optimize for size" means exactly that... intended for cases
where saving storage (e.g. ROM) or code download time is paramount.

We have frequently asked them for an optimization option that is not
strictly byte-count-based but still tries to reduce cache footprint, but
it is a nontrivial project.

	-hpa

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Thread

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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