From: Marc MERLIN <marc@merlins.org>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Pavel Machek <pavel@ucw.cz>, David Rientjes <rientjes@google.com>,
sgruszka@redhat.com, linux-wireless@vger.kernel.org,
johannes.berg@intel.com, wey-yi.w.guy@intel.com,
ilw@linux.intel.com, Andrew Morton <akpm@osdl.org>,
Mel Gorman <mgorman@suse.de>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: iwl3945: order 5 allocation during ifconfig up; vm problem?
Date: Tue, 11 Sep 2012 22:57:12 -0700 [thread overview]
Message-ID: <20120912055712.GE11613@merlins.org> (raw)
In-Reply-To: <1347426988.13103.684.camel@edumazet-glaptop>
On Wed, Sep 12, 2012 at 07:16:28AM +0200, Eric Dumazet wrote:
> On Tue, 2012-09-11 at 16:25 -0700, Andrew Morton wrote:
>
> > Asking for a 256k allocation is pretty crazy - this is an operating
> > system kernel, not a userspace application.
> >
> > I'm wondering if this is due to a recent change, but I'm having trouble
> > working out where the allocation call site is.
> > --
>
> (Adding Marc Merlin to CC, since he reported same problem)
>
> Thats the firmware loading in iwlwifi driver. Not sure if it can use SG.
>
> drivers/net/wireless/iwlwifi/iwl-drv.c
>
> iwl_alloc_ucode() -> iwl_alloc_fw_desc() -> dma_alloc_coherent()
>
> It seems some sections of /lib/firmware/iwlwifi*.ucode files are above
> 128 Kbytes, so dma_alloc_coherent() try order-5 allocations
Thanks for looping me in, yes, this looks very familiar to me :)
In the other thread, Johannes Berg gave me this patch which is supposed to
help: http://p.sipsolutions.net/11ea33b376a5bac5.txt
Unfortunately due to very long work days, I haven't had the time to try it
out yet, but I will soon.
Would that help in this case too?
And to answer David Rientjes, I also have compaction on:
gandalfthegreat:~# zgrep CONFIG_COMPACTION /proc/config.gz
CONFIG_COMPACTION=y
Full config:
http://marc.merlins.org/tmp/config-3.5.2-amd64-preempt-noide-20120731
If that helps for comparison, my thread is here:
http://www.spinics.net/lists/linux-wireless/msg96438.html
Thanks,
Marc
--
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
.... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/
WARNING: multiple messages have this Message-ID (diff)
From: Marc MERLIN <marc@merlins.org>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Pavel Machek <pavel@ucw.cz>, David Rientjes <rientjes@google.com>,
sgruszka@redhat.com, linux-wireless@vger.kernel.org,
johannes.berg@intel.com, wey-yi.w.guy@intel.com,
ilw@linux.intel.com, Andrew Morton <akpm@osdl.org>,
Mel Gorman <mgorman@suse.de>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: iwl3945: order 5 allocation during ifconfig up; vm problem?
Date: Tue, 11 Sep 2012 22:57:12 -0700 [thread overview]
Message-ID: <20120912055712.GE11613@merlins.org> (raw)
In-Reply-To: <1347426988.13103.684.camel@edumazet-glaptop>
On Wed, Sep 12, 2012 at 07:16:28AM +0200, Eric Dumazet wrote:
> On Tue, 2012-09-11 at 16:25 -0700, Andrew Morton wrote:
>
> > Asking for a 256k allocation is pretty crazy - this is an operating
> > system kernel, not a userspace application.
> >
> > I'm wondering if this is due to a recent change, but I'm having trouble
> > working out where the allocation call site is.
> > --
>
> (Adding Marc Merlin to CC, since he reported same problem)
>
> Thats the firmware loading in iwlwifi driver. Not sure if it can use SG.
>
> drivers/net/wireless/iwlwifi/iwl-drv.c
>
> iwl_alloc_ucode() -> iwl_alloc_fw_desc() -> dma_alloc_coherent()
>
> It seems some sections of /lib/firmware/iwlwifi*.ucode files are above
> 128 Kbytes, so dma_alloc_coherent() try order-5 allocations
Thanks for looping me in, yes, this looks very familiar to me :)
In the other thread, Johannes Berg gave me this patch which is supposed to
help: http://p.sipsolutions.net/11ea33b376a5bac5.txt
Unfortunately due to very long work days, I haven't had the time to try it
out yet, but I will soon.
Would that help in this case too?
And to answer David Rientjes, I also have compaction on:
gandalfthegreat:~# zgrep CONFIG_COMPACTION /proc/config.gz
CONFIG_COMPACTION=y
Full config:
http://marc.merlins.org/tmp/config-3.5.2-amd64-preempt-noide-20120731
If that helps for comparison, my thread is here:
http://www.spinics.net/lists/linux-wireless/msg96438.html
Thanks,
Marc
--
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
.... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/
--
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next prev parent reply other threads:[~2012-09-12 5:57 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-09 21:32 iwl3945: order 5 allocation during ifconfig up; vm problem? Pavel Machek
2012-09-09 21:32 ` Pavel Machek
2012-09-09 22:40 ` David Rientjes
2012-09-09 22:40 ` David Rientjes
2012-09-10 11:11 ` Pavel Machek
2012-09-10 11:11 ` Pavel Machek
2012-09-11 23:25 ` Andrew Morton
2012-09-11 23:25 ` Andrew Morton
2012-09-12 5:16 ` Eric Dumazet
2012-09-12 5:16 ` Eric Dumazet
2012-09-12 5:57 ` Marc MERLIN [this message]
2012-09-12 5:57 ` Marc MERLIN
2012-09-12 6:54 ` Johannes Berg
2012-09-12 6:54 ` Johannes Berg
2012-09-24 9:03 ` Dan Carpenter
2012-09-24 9:03 ` Dan Carpenter
2012-09-24 9:14 ` Johannes Berg
2012-09-24 9:14 ` Johannes Berg
2012-09-12 9:22 ` Stanislaw Gruszka
2012-09-12 9:22 ` Stanislaw Gruszka
2012-09-12 10:18 ` Mel Gorman
2012-09-12 10:18 ` Mel Gorman
2012-10-03 11:37 ` Stanislaw Gruszka
2012-10-03 11:37 ` Stanislaw Gruszka
2012-10-03 18:07 ` David Rientjes
2012-10-03 18:07 ` David Rientjes
2012-10-05 8:37 ` Stanislaw Gruszka
2012-10-05 8:37 ` Stanislaw Gruszka
2012-10-06 12:08 ` Pavel Machek
2012-10-06 12:08 ` Pavel Machek
2012-10-08 15:38 ` Stanislaw Gruszka
2012-10-08 15:38 ` Stanislaw Gruszka
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