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From: David Howells <dhowells@redhat.com>
To: Matthew Wilcox <willy@infradead.org>
Cc: dhowells@redhat.com, Minchan Kim <minchan@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
	sergey.senozhatsky@gmail.com, iamjoonsoo.kim@lge.com,
	ngupta@vflare.org, zhouxianrong@huawei.com, zhouxiyu@huawei.com,
	weidu.du@huawei.com, zhangshiming5@huawei.com,
	Mi.Sophia.Wang@huawei.com, won.ho.park@huawei.com
Subject: Re: memfill
Date: Tue, 07 Feb 2017 09:40:04 +0000	[thread overview]
Message-ID: <27995.1486460404@warthog.procyon.org.uk> (raw)
In-Reply-To: <20170206144902.GH2267@bombadil.infradead.org>

Matthew Wilcox <willy@infradead.org> wrote:

> [adding linux-arch to see if anyone there wants to do an optimised
> version of memfill for their CPU]

For mn10300, this is superfluous since the memset() implementation will do
optimised filling of up to 8 x 4 bytes per loop if the alignments suit.

This is also superfluous for frv as that will do up to 8 x 8 bytes per loop.

So on both those arches, memfill() should probably just wrap memset().

David

  parent reply	other threads:[~2017-02-07  9:40 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-05 15:16 [PATCH v4] zram: extend zero pages to same element pages Minchan Kim
2017-02-06 14:49 ` memfill Matthew Wilcox
2017-02-07  2:47   ` memfill zhouxianrong
2017-02-07  2:47     ` memfill zhouxianrong
2017-02-07  4:59   ` memfill Minchan Kim
2017-02-07  4:59     ` memfill Minchan Kim
2017-02-07  9:40   ` David Howells [this message]
2017-02-07 17:22     ` memfill Matthew Wilcox
2017-02-07 17:29       ` memfill David Howells
2017-02-07 19:03         ` memfill Matthew Wilcox
2017-02-07 19:07   ` memfill James Bottomley
2017-02-08 18:04     ` memfill Matthew Wilcox
2017-02-08 21:01       ` memfill James Bottomley
2017-02-08 21:54         ` memfill Matthew Wilcox
2017-02-07  6:57 ` [PATCH v4] zram: extend zero pages to same element pages Minchan Kim
2017-03-11 14:56 ` memfill v2 now with ARM and x86 implementations Matthew Wilcox
2017-03-13  5:17   ` Minchan Kim

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