Re: [PATCH] mm: extend zero pages to same element pages for zram
From: Minchan Kim <minchan@kernel.org>
Date: 2017-01-25 05:46:24
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On Wed, Jan 25, 2017 at 02:38:49PM +0900, Sergey Senozhatsky wrote:
On (01/25/17 13:51), Minchan Kim wrote: [..]quoted
quoted
Minchan, zhouxianrong, I was completely wrong. we can't do memset(). d'oh, I did not know it truncates 4 bytes to one byte only (doesn't make too much sense to me).Now, I read Matthew's comment and understood. Thanks. It means zhouxianrong's patch I sent recently is okay?this one looks OK to me https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1316290.html I'd agree with Joonsoo that doing forward prefetching is _probably_ better than backwards prefetching. not that it necessarily should confuse the CPU (need to google if ARM handles it normally), but still.
Okay, let's settle down. zhouxianrong, please resend one Sergey pointed out with changing to forward loop. though, sorry for a lot confusion!
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