Messages in this thread | | | Subject | Re: ARM64 readahead: fault retry breaks mmap file read random detection | From | Mark Salyzyn <> | Date | Mon, 21 Sep 2015 14:36:40 -0700 |
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On 09/21/2015 02:09 PM, Will Deacon wrote: > On Mon, Sep 21, 2015 at 09:39:50PM +0100, Mark Salyzyn wrote: >> Description from commit 45cac65b0fcd >> ("readahead: fault retry breaks mmap file read random detection") >> . . . >> Yup, arm64 needs this too! Random read improves by 250%, sequential >> read improves by 40%, and random write by 400% to an eMMC device with >> dm crypto wrapped around it. > Thanks for this. This must've gone in whilst we were developing the initial > version of the arm64 port and has since gone unnoticed. > > I'll queue it on the arm64 fixes branch and send a pull request after > some testing. > > Will
As noted, this fix may need to be propagated to all the arch-specific code, I was not in a position to check this out on arm (32 bit) and the benchmarking code I used did not immediately port to 32-bit.
Sincerely -- Mark Salyzyn
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