From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Hugh Dickins <hugh@veritas.com>
Cc: Roland Dreier <rdreier@cisco.com>, Andrew Morton <akpm@osdl.org>,
"Bryan O'Sullivan" <bos@pathscale.com>,
torvalds@osdl.org, hch@infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 10 of 20] ipath - support for userspace apps using core driver
Date: Sat, 18 Mar 2006 09:21:36 +1100 [thread overview]
Message-ID: <441B3670.5010502@yahoo.com.au> (raw)
In-Reply-To: <Pine.LNX.4.61.0603171440570.31402@goblin.wat.veritas.com>
[I'm not a driver or pci/dma person either, so I can't usefully answer
most of your questions, I'm afraid]
Hugh Dickins wrote:
> Is there any chance that your split_page() work in -mm, actually addresses
> precisely those places that were screwed up by universal compound pages?
> So that with your split_page(), we could go back to every >0-order page
> being PageCompound, without any need for __GFP_COMP.
>
I think it should catch most of the places [I'm sure I've missed some :(]
that split up higher-order pages (which doesn't work on compound pages, I
guess this was the problem).
It makes like difficult for some future patch of mine if the refcounting
mechanism is changed while the page is allocated (eg. like PageReserved
used to do), however I think it wouldn't be too hard to instead invert the
meaning of the flag and just use it in those few places that care?
--
SUSE Labs, Novell Inc.
Send instant messages to your online friends http://au.messenger.yahoo.com
next prev parent reply other threads:[~2006-03-17 22:21 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <71644dd19420ddb07a75.1141922823@localhost.localdomain>
2006-03-09 23:28 ` [PATCH 10 of 20] ipath - support for userspace apps using core driver Roland Dreier
2006-03-09 23:55 ` Bryan O'Sullivan
2006-03-10 0:01 ` Roland Dreier
2006-03-10 0:07 ` Bryan O'Sullivan
2006-03-10 0:32 ` Roland Dreier
2006-03-10 0:36 ` Bryan O'Sullivan
2006-03-10 0:37 ` Andrew Morton
2006-03-10 0:50 ` Bryan O'Sullivan
2006-03-16 0:56 ` Bryan O'Sullivan
2006-03-16 1:51 ` Roland Dreier
2006-03-16 2:11 ` Bryan O'Sullivan
2006-03-16 2:37 ` Roland Dreier
2006-03-16 2:52 ` Bryan O'Sullivan
2006-03-16 2:56 ` Bryan O'Sullivan
2006-03-16 3:28 ` Andrew Morton
2006-03-16 4:58 ` Bryan O'Sullivan
2006-03-16 5:38 ` Andrew Morton
2006-03-16 5:54 ` Roland Dreier
2006-03-16 6:17 ` Andrew Morton
2006-03-16 6:44 ` Nick Piggin
2006-03-16 9:39 ` Andrew Morton
2006-03-16 10:00 ` Nick Piggin
2006-03-16 7:25 ` Roland Dreier
2006-03-16 16:46 ` Linus Torvalds
2006-03-16 14:57 ` Hugh Dickins
2006-03-16 6:31 ` Nick Piggin
2006-03-16 14:34 ` Hugh Dickins
2006-03-17 0:37 ` Nick Piggin
2006-03-17 1:09 ` Roland Dreier
2006-03-17 15:27 ` Hugh Dickins
2006-03-17 22:21 ` Nick Piggin [this message]
2006-03-17 16:11 ` Bryan O'Sullivan
2006-03-17 16:28 ` Linus Torvalds
2006-03-17 16:40 ` Bryan O'Sullivan
2006-03-17 22:28 ` Nick Piggin
2006-03-17 22:14 ` Nick Piggin
2006-03-16 15:12 ` Bryan O'Sullivan
2006-03-16 17:08 ` Linus Torvalds
2006-03-16 17:46 ` Hugh Dickins
2006-03-16 17:53 ` Bryan O'Sullivan
2006-03-16 14:24 ` Hugh Dickins
2006-03-16 15:33 ` Bryan O'Sullivan
2006-03-16 17:23 ` Hugh Dickins
2006-03-16 17:40 ` Bryan O'Sullivan
2006-03-16 19:52 ` Bryan O'Sullivan
2006-03-16 20:10 ` Hugh Dickins
2006-03-16 20:35 ` Linus Torvalds
2006-03-16 20:43 ` Bryan O'Sullivan
2006-03-21 20:52 ` Bryan O'Sullivan
2006-03-21 23:20 ` Hugh Dickins
2006-03-22 15:58 ` Bryan O'Sullivan
2006-03-22 16:19 ` Linus Torvalds
2006-03-22 16:43 ` Bryan O'Sullivan
2006-03-22 17:46 ` Hugh Dickins
2006-03-22 17:53 ` Bryan O'Sullivan
2006-03-16 23:37 ` Roland Dreier
2006-03-16 23:51 ` Remapping pages mapped to userspace (was: [PATCH 10 of 20] ipath - support for userspace apps using core driver) Roland Dreier
2006-03-16 23:56 ` Bryan O'Sullivan
2006-03-17 1:10 ` Remapping pages mapped to userspace Roland Dreier
2006-03-17 1:12 ` Roland Dreier
2006-03-17 1:28 ` Alan Cox
2006-03-17 2:16 ` Roland Dreier
2006-03-17 17:13 ` Remapping pages mapped to userspace (was: [PATCH 10 of 20] ipath - support for userspace apps using core driver) Hugh Dickins
2006-03-17 17:17 ` Bryan O'Sullivan
2006-03-17 17:30 ` Linus Torvalds
2006-03-17 18:20 ` Hugh Dickins
2006-03-17 22:58 ` Remapping pages mapped to userspace Roland Dreier
2006-03-16 15:08 ` [PATCH 10 of 20] ipath - support for userspace apps using core driver Bryan O'Sullivan
2006-03-16 17:27 ` Hugh Dickins
2006-03-16 17:44 ` Bryan O'Sullivan
2006-03-16 16:52 ` Bryan O'Sullivan
2006-03-16 3:58 ` Linus Torvalds
2006-03-16 4:53 ` Roland Dreier
2006-03-16 2:28 ` Linus Torvalds
2006-03-09 23:33 ` Roland Dreier
2006-03-09 23:56 ` Bryan O'Sullivan
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
2006-03-10 0:35 ` [PATCH 10 of 20] ipath - support for userspace apps using core driver Bryan O'Sullivan
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