From: Linus Torvalds <torvalds@linux-foundation.org>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: "James Bottomley" <James.Bottomley@hansenpartnership.com>,
"Trond Myklebust" <Trond.Myklebust@netapp.com>,
linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org,
"Marc Kleine-Budde" <mkl@pengutronix.de>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
"Marc Kleine-Budde" <m.kleine-budde@pengutronix.de>,
linux-arm-kernel@lists.infradead.org,
"Parisc List" <linux-parisc@vger.kernel.org>,
linux-arch@vger.kernel.org
Subject: Re: still nfs problems [Was: Linux 2.6.37-rc8]
Date: Wed, 5 Jan 2011 13:08:48 -0800 [thread overview]
Message-ID: <AANLkTi=EXXBTW7oWHq3D+PHsx=thF1CpkRjn0ax2p5rm@mail.gmail.com> (raw)
In-Reply-To: <20110105210448.GM8638@n2100.arm.linux.org.uk>
On Wed, Jan 5, 2011 at 1:04 PM, Russell King - ARM Linux
<linux@arm.linux.org.uk> wrote:
> On Wed, Jan 05, 2011 at 12:48:32PM -0800, Linus Torvalds wrote:
>> (You can also force the problem with vmalloc() an then following the
>> kernel page tables, but I hope nobody does that any more. I suspect
>> I'm wrong, though, there's probably code that mixes vmalloc and
>> physical page accesses in various drivers)
>
> Should vmalloc_to_page() (84 users)/vmalloc_to_pfn() (17 users) be
> deprecated then? ;)
I do think that the "modern" way of doing it is
"vmap()"/"vm_map_ram()" and friends, and it should be preferred over
using vmalloc() and then looking up the pages.
But in the end, the two approaches really are equivalent, so it's not
like it really matters. So I don't think we need to deprecate things
officially, but obviously we should make people more aware of the
whole virtual alias thing that crops up whenever you use any of these
approaches.
Linus
next prev parent reply other threads:[~2011-01-05 21:08 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-05 19:05 still nfs problems [Was: Linux 2.6.37-rc8] James Bottomley
2011-01-05 19:18 ` Linus Torvalds
[not found] ` <AANLkTi=VZUxNFd7n-qwf5aiOeK5rkk8qBmo+kOpgg7up-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-01-05 19:36 ` James Bottomley
2011-01-05 19:36 ` James Bottomley
2011-01-05 19:49 ` Linus Torvalds
2011-01-05 20:35 ` James Bottomley
[not found] ` <1294256169.16957.18.camel-0iu6Cu4xQGLYCGPCin2YbQ@public.gmane.org>
2011-01-05 20:00 ` Russell King - ARM Linux
2011-01-05 20:00 ` Russell King - ARM Linux
2011-01-05 20:33 ` James Bottomley
2011-01-05 20:33 ` James Bottomley
2011-01-05 20:48 ` Linus Torvalds
[not found] ` <AANLkTimzzBsdtWcZtP5E_CH1hUZugGMoaHOiMdQJf764-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-01-05 21:04 ` Russell King - ARM Linux
2011-01-05 21:04 ` Russell King - ARM Linux
2011-01-05 21:08 ` Linus Torvalds [this message]
2011-01-05 21:08 ` Linus Torvalds
[not found] ` <AANLkTi=EXXBTW7oWHq3D+PHsx=thF1CpkRjn0ax2p5rm-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-01-05 21:16 ` Trond Myklebust
2011-01-05 21:16 ` Trond Myklebust
[not found] ` <1294262208.2952.4.camel-rJ7iovZKK19ZJLDQqaL3InhyD016LWXt@public.gmane.org>
2011-01-05 21:30 ` Linus Torvalds
2011-01-05 21:30 ` Linus Torvalds
2011-01-05 23:06 ` Trond Myklebust
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
2011-01-06 17:55 ` Linus Torvalds
2011-01-07 18:53 ` Trond Myklebust
[not found] ` <1294426405.2929.23.camel-rJ7iovZKK19ZJLDQqaL3InhyD016LWXt@public.gmane.org>
2011-01-07 19:02 ` Russell King - ARM Linux
2011-01-07 19:02 ` Russell King - ARM Linux
2011-01-07 19:11 ` James Bottomley
2011-01-07 19:11 ` James Bottomley
[not found] ` <1294427467.4895.66.camel-0iu6Cu4xQGLYCGPCin2YbQ@public.gmane.org>
2011-01-08 16:49 ` Trond Myklebust
2011-01-08 16:49 ` Trond Myklebust
2011-01-08 23:15 ` Trond Myklebust
2011-01-08 23:15 ` Trond Myklebust
[not found] ` <1294528551.4181.19.camel-rJ7iovZKK19ZJLDQqaL3InhyD016LWXt@public.gmane.org>
2011-01-10 10:50 ` Uwe Kleine-König
2011-01-10 10:50 ` Uwe Kleine-König
2011-01-10 16:25 ` Trond Myklebust
[not found] ` <1294676734.3349.10.camel-rJ7iovZKK19ZJLDQqaL3InhyD016LWXt@public.gmane.org>
2011-01-10 17:08 ` Marc Kleine-Budde
2011-01-10 17:08 ` Marc Kleine-Budde
2011-01-10 17:20 ` Trond Myklebust
[not found] ` <1294680035.3349.19.camel-rJ7iovZKK19ZJLDQqaL3InhyD016LWXt@public.gmane.org>
2011-01-10 17:26 ` Marc Kleine-Budde
2011-01-10 17:26 ` Marc Kleine-Budde
2011-01-10 19:25 ` Uwe Kleine-König
[not found] ` <20110110192552.GG24920-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
2011-01-10 19:29 ` Trond Myklebust
2011-01-10 19:29 ` Trond Myklebust
2011-01-10 19:31 ` James Bottomley
2011-01-10 19:34 ` Linus Torvalds
2011-01-10 19:34 ` Linus Torvalds
2011-01-10 20:15 ` Trond Myklebust
2011-01-10 12:44 ` Marc Kleine-Budde
2011-01-10 12:44 ` Marc Kleine-Budde
2011-01-07 19:13 ` Trond Myklebust
2011-01-07 19:05 ` James Bottomley
[not found] ` <1294335614.22825.154.camel-0iu6Cu4xQGLYCGPCin2YbQ@public.gmane.org>
2011-01-06 18:05 ` Russell King - ARM Linux
2011-01-06 18:05 ` Russell King - ARM Linux
2011-01-06 18:14 ` James Bottomley
2011-01-06 18:14 ` James Bottomley
[not found] ` <1294337670.22825.199.camel-0iu6Cu4xQGLYCGPCin2YbQ@public.gmane.org>
2011-01-06 18:25 ` James Bottomley
2011-01-06 18:25 ` James Bottomley
2011-01-06 21:07 ` James Bottomley
2011-01-06 21:07 ` James Bottomley
2011-01-06 20:19 ` John Stoffel
2011-01-06 20:19 ` John Stoffel
2011-01-05 23:28 ` Linus Torvalds
2011-01-05 23:28 ` Linus Torvalds
[not found] ` <AANLkTi=SjMinMp+m726GS1iehj6cQgNy1RqSoUqKhjtv-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-01-05 23:59 ` Russell King - ARM Linux
2011-01-05 23:59 ` Russell King - ARM Linux
2011-01-05 21:16 ` James Bottomley
2011-01-05 21:16 ` James Bottomley
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