From: Matthew Wilcox <willy@infradead.org>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: linux-kernel@vger.kernel.org, minchan@kernel.org,
Matthew Wilcox <mawilcox@microsoft.com>,
akpm@linuxfoundation.org
Subject: Re: [PATCH v4 0/8] Multibyte memset variations
Date: Tue, 25 Jul 2017 06:08:18 -0700 [thread overview]
Message-ID: <20170725130818.GA23770@bombadil.infradead.org> (raw)
In-Reply-To: <87fudl6q7p.fsf@concordia.ellerman.id.au>
On Tue, Jul 25, 2017 at 03:27:38PM +1000, Michael Ellerman wrote:
> Matthew Wilcox <willy@infradead.org> writes:
>
> > From: Matthew Wilcox <mawilcox@microsoft.com>
> >
> > A relatively common idiom we're missing is a function to fill an area
> > of memory with a pattern which is larger than a single byte. I first
> > noticed this with a zram patch which wanted to fill a page with an
> > 'unsigned long' value. There turn out to be quite a few places in
> > the kernel which can benefit from using an optimised function rather
> > than a loop; sometimes text size, sometimes speed, and sometimes both.
> > The optimised PowerPC version (not included here) improves performance
> > by about 30% on POWER8 on just the raw memset_l().
>
> Is the plan that Andrew will merge this series, or are you planning to
> put them in a tree of yours?
I'm hoping Andrew will take it, but I can put it in my own tree if he
doesn't want to take it.
prev parent reply other threads:[~2017-07-25 13:08 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-20 18:45 Matthew Wilcox
2017-07-20 18:45 ` [PATCH v4 1/8] Add multibyte memset functions Matthew Wilcox
2017-07-20 18:45 ` [PATCH v4 2/8] Add testcases for memset16/32/64 Matthew Wilcox
2017-07-20 18:45 ` [PATCH v4 3/8] x86: Implement memset16, memset32 & memset64 Matthew Wilcox
2017-07-20 18:45 ` [PATCH v4 4/8] ARM: Implement " Matthew Wilcox
2017-07-20 18:45 ` [PATCH v4 5/8] alpha: Add support for memset16 Matthew Wilcox
2017-07-20 18:45 ` [PATCH v4 6/8] zram: Convert to using memset_l Matthew Wilcox
2017-07-20 18:45 ` [PATCH v4 7/8] sym53c8xx_2: Convert to use memset32 Matthew Wilcox
2017-07-20 18:45 ` [PATCH v4 8/8] vga: Optimise console scrolling Matthew Wilcox
2017-07-25 5:27 ` [PATCH v4 0/8] Multibyte memset variations Michael Ellerman
2017-07-25 13:08 ` Matthew Wilcox [this message]
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