From: Roman Peniaev <r.peniaev@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Chris Wilson <chris@chris-wilson.co.uk>,
intel-gfx@lists.freedesktop.org,
Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>,
Daniel Vetter <daniel.vetter@ffwll.ch>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Mel Gorman <mgorman@techsingularity.net>,
Toshi Kani <toshi.kani@hp.com>,
Shawn Lin <shawn.lin@rock-chips.com>,
linux-mm@kvack.org,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] mm/vmalloc: Keep a separate lazy-free list
Date: Sat, 23 Apr 2016 13:21:08 +0200 [thread overview]
Message-ID: <CACZ9PQXze0dPHz9vf8o+Cpzv8j__Oe+HBJmv8H=bCNie_x+CyA@mail.gmail.com> (raw)
In-Reply-To: <20160422144957.64619ee9b19991e4fdf89668@linux-foundation.org>
On Fri, Apr 22, 2016 at 11:49 PM, Andrew Morton
<akpm@linux-foundation.org> wrote:
> On Fri, 15 Apr 2016 12:14:31 +0100 Chris Wilson <chris@chris-wilson.co.uk> wrote:
>
>> > > purge_fragmented_blocks() manages per-cpu lists, so that looks safe
>> > > under its own rcu_read_lock.
>> > >
>> > > Yes, it looks feasible to remove the purge_lock if we can relax sync.
>> >
>> > what is still left is waiting on vmap_area_lock for !sync mode.
>> > but probably is not that bad.
>>
>> Ok, that's bit beyond my comfort zone with a patch to change the free
>> list handling. I'll chicken out for the time being, atm I am more
>> concerned that i915.ko may call set_page_wb() frequently on individual
>> pages.
>
> Nick Piggin's vmap rewrite. 20x (or more) faster.
> https://lwn.net/Articles/285341/
>
> 10 years ago, never finished.
But that's exactly what we are changing making 20.5x faster :)
--
Roman
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
prev parent reply other threads:[~2016-04-23 11:21 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-12 6:57 Chris Wilson
2016-04-14 13:13 ` Roman Peniaev
2016-04-14 13:49 ` Chris Wilson
2016-04-14 14:44 ` Roman Peniaev
2016-04-15 11:07 ` [PATCH v2] " Chris Wilson
2016-04-15 11:54 ` Roman Peniaev
2016-04-15 11:14 ` [PATCH] " Chris Wilson
2016-04-22 21:49 ` Andrew Morton
2016-04-23 11:21 ` Roman Peniaev [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='CACZ9PQXze0dPHz9vf8o+Cpzv8j__Oe+HBJmv8H=bCNie_x+CyA@mail.gmail.com' \
--to=r.peniaev@gmail.com \
--cc=akpm@linux-foundation.org \
--cc=chris@chris-wilson.co.uk \
--cc=daniel.vetter@ffwll.ch \
--cc=iamjoonsoo.kim@lge.com \
--cc=intel-gfx@lists.freedesktop.org \
--cc=joonas.lahtinen@linux.intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mgorman@techsingularity.net \
--cc=rientjes@google.com \
--cc=shawn.lin@rock-chips.com \
--cc=toshi.kani@hp.com \
--cc=tvrtko.ursulin@linux.intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox