From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: still nfs problems [Was: Linux 2.6.37-rc8]
Date: Wed, 5 Jan 2011 19:07:34 +0000 [thread overview]
Message-ID: <20110105190734.GI8638@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <1294253705.3574.21.camel@heimdal.trondhjem.org>
On Wed, Jan 05, 2011 at 01:55:05PM -0500, Trond Myklebust wrote:
> On Wed, 2011-01-05 at 18:27 +0000, Russell King - ARM Linux wrote:
> > I do still think you need _something_ there, otherwise data can remain
> > in the direct map alias and not be visible via the vmap alias. I don't
> > see that we have anything in place to handle this at present though.
>
> Is that perhaps what flush_kernel_dcache_page() is supposed to do?
Well, given how we have things currently setup on ARM, this ends up
being a no-op - as new page cache pages are marked dirty and their
flushing done at the point when they're mapped into userspace.
I guess we could do the flushing there and mark the page clean, but
it'd need some careful examination of various code paths to confirm
that it's safe - we may be avoiding this because some ARM arch
versions need to manually IPI cache flushes to other cores (which
can only be done with IRQs enabled.)
So, I don't think it'll do at the present time.
next prev parent reply other threads:[~2011-01-05 19:07 UTC|newest]
Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <AANLkTi=-dNeeDjcSoznKtwcaNyw1mMXSqepFY89R2i+2@mail.gmail.com>
2010-12-30 17:14 ` still nfs problems [Was: Linux 2.6.37-rc8] Uwe Kleine-König
2010-12-30 17:57 ` Linus Torvalds
2010-12-30 18:24 ` Trond Myklebust
2010-12-30 18:50 ` Linus Torvalds
2010-12-30 19:25 ` Trond Myklebust
2010-12-30 20:02 ` Linus Torvalds
2010-12-30 17:59 ` Trond Myklebust
2010-12-30 19:18 ` Uwe Kleine-König
2011-01-03 21:38 ` Uwe Kleine-König
2011-01-04 0:22 ` Trond Myklebust
2011-01-05 8:40 ` Uwe Kleine-König
2011-01-05 11:05 ` Uwe Kleine-König
2011-01-05 11:27 ` Russell King - ARM Linux
2011-01-05 12:14 ` Marc Kleine-Budde
2011-01-05 13:02 ` Nori, Sekhar
2011-01-05 15:34 ` Russell King - ARM Linux
2011-01-05 13:40 ` Uwe Kleine-König
2011-01-05 14:29 ` Jim Rees
2011-01-05 14:42 ` Marc Kleine-Budde
2011-01-05 15:38 ` Jim Rees
2011-01-05 14:53 ` Trond Myklebust
2011-01-05 15:01 ` Marc Kleine-Budde
2011-01-05 15:14 ` Trond Myklebust
2011-01-05 15:29 ` Trond Myklebust
2011-01-05 15:39 ` Marc Kleine-Budde
2011-01-05 15:52 ` Russell King - ARM Linux
2011-01-05 17:17 ` Trond Myklebust
2011-01-05 17:26 ` Russell King - ARM Linux
2011-01-05 18:12 ` Trond Myklebust
2011-01-05 18:27 ` Russell King - ARM Linux
2011-01-05 18:55 ` Trond Myklebust
2011-01-05 19:07 ` Russell King - ARM Linux [this message]
2011-01-14 2:25 ` Andy Isaacson
2011-01-14 2:40 ` Trond Myklebust
2011-01-14 4:22 ` Andy Isaacson
2011-01-05 19:05 James Bottomley
2011-01-05 19:18 ` Linus Torvalds
2011-01-05 19:36 ` James Bottomley
2011-01-05 19:49 ` Linus Torvalds
2011-01-05 20:35 ` James Bottomley
2011-01-05 20:00 ` Russell King - ARM Linux
2011-01-05 20:33 ` James Bottomley
2011-01-05 20:48 ` Linus Torvalds
2011-01-05 21:04 ` Russell King - ARM Linux
2011-01-05 21:08 ` Linus Torvalds
2011-01-05 21:16 ` Trond Myklebust
2011-01-05 21:30 ` Linus Torvalds
2011-01-05 23:06 ` Trond Myklebust
2011-01-05 23:28 ` James Bottomley
2011-01-06 17:40 ` James Bottomley
2011-01-06 17:47 ` Trond Myklebust
2011-01-06 17:51 ` James Bottomley
2011-01-06 17:55 ` Linus Torvalds
2011-01-07 18:53 ` Trond Myklebust
2011-01-07 19:02 ` Russell King - ARM Linux
2011-01-07 19:11 ` James Bottomley
2011-01-08 16:49 ` Trond Myklebust
2011-01-08 23:15 ` Trond Myklebust
2011-01-10 10:50 ` Uwe Kleine-König
2011-01-10 16:25 ` Trond Myklebust
2011-01-10 17:08 ` Marc Kleine-Budde
2011-01-10 17:20 ` Trond Myklebust
2011-01-10 17:26 ` Marc Kleine-Budde
2011-01-10 19:25 ` Uwe Kleine-König
2011-01-10 19:29 ` Trond Myklebust
2011-01-10 19:31 ` James Bottomley
2011-01-10 19:34 ` Linus Torvalds
2011-01-10 20:15 ` Trond Myklebust
2011-01-10 12:44 ` Marc Kleine-Budde
2011-01-07 19:13 ` Trond Myklebust
2011-01-07 19:05 ` James Bottomley
2011-01-06 18:05 ` Russell King - ARM Linux
2011-01-06 18:14 ` James Bottomley
2011-01-06 18:25 ` James Bottomley
2011-01-06 21:07 ` James Bottomley
2011-01-06 20:19 ` John Stoffel
2011-01-05 23:28 ` Linus Torvalds
2011-01-05 23:59 ` Russell King - ARM Linux
2011-01-05 21:16 ` James Bottomley
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