From: Russell King - ARM Linux <linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org>
To: James Bottomley
<James.Bottomley-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org>
Cc: "Trond Myklebust"
<Trond.Myklebust-HgOvQuBEEgTQT0dZR+AlfA@public.gmane.org>,
"Linus Torvalds"
<torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
"Marc Kleine-Budde" <mkl-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>,
"Uwe Kleine-König"
<u.kleine-koenig-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>,
"Marc Kleine-Budde"
<m.kleine-budde-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
"Parisc List"
<linux-parisc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: still nfs problems [Was: Linux 2.6.37-rc8]
Date: Thu, 6 Jan 2011 18:05:30 +0000 [thread overview]
Message-ID: <20110106180530.GI31708@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <1294335614.22825.154.camel-0iu6Cu4xQGLYCGPCin2YbQ@public.gmane.org>
On Thu, Jan 06, 2011 at 11:40:13AM -0600, James Bottomley wrote:
> On Wed, 2011-01-05 at 23:28 +0000, James Bottomley wrote:
> > Can you explain how the code works? it looks to me like you read the xdr
> > stuff through the vmap region then write it out directly to the pages?
>
> OK, I think I see how this is supposed to work: It's a sequential loop
> of reading in via the pages (i.e. through the kernel mapping) and then
> updating those pages via the vmap. In which case, I think this patch is
> what you need.
>
> The theory of operation is that the readdir on pages actually uses the
> network DMA operations to perform, so when it's finished, the underlying
What network DMA operations - what if your NIC doesn't do DMA because
it's an SMSC device?
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WARNING: multiple messages have this Message-ID (diff)
From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: "Trond Myklebust" <Trond.Myklebust@netapp.com>,
"Linus Torvalds" <torvalds@linux-foundation.org>,
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: Thu, 6 Jan 2011 18:05:30 +0000 [thread overview]
Message-ID: <20110106180530.GI31708@n2100.arm.linux.org.uk> (raw)
Message-ID: <20110106180530.5EjTmdUUVV1Rlu3yxou5SFfoKcL00LEfSRmn8SgtAIo@z> (raw)
In-Reply-To: <1294335614.22825.154.camel@mulgrave.site>
On Thu, Jan 06, 2011 at 11:40:13AM -0600, James Bottomley wrote:
> On Wed, 2011-01-05 at 23:28 +0000, James Bottomley wrote:
> > Can you explain how the code works? it looks to me like you read the xdr
> > stuff through the vmap region then write it out directly to the pages?
>
> OK, I think I see how this is supposed to work: It's a sequential loop
> of reading in via the pages (i.e. through the kernel mapping) and then
> updating those pages via the vmap. In which case, I think this patch is
> what you need.
>
> The theory of operation is that the readdir on pages actually uses the
> network DMA operations to perform, so when it's finished, the underlying
What network DMA operations - what if your NIC doesn't do DMA because
it's an SMSC device?
next prev parent reply other threads:[~2011-01-06 18:05 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
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 [this message]
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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