From: Tony Battersby <tonyb@cybernetics.com>
To: Arjan van de Ven <arjan@linux.intel.com>
Cc: Ingo Molnar <mingo@elte.hu>,
linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Suresh Siddha <suresh.b.siddha@intel.com>,
venkatesh.pallipadi@intel.com, jeremy@goop.org
Subject: Re: DEBUG_PAGEALLOC + order-10 alloc/free_pages = lockup
Date: Mon, 29 Dec 2008 09:30:52 -0500 [thread overview]
Message-ID: <4958DF1C.7010002@cybernetics.com> (raw)
In-Reply-To: <4954AA0B.9030401@linux.intel.com>
Arjan van de Ven wrote:
> I also wonder who is doing an order 10 allocation... that'd worry me ;)
>
>
I was waiting for someone to ask that. This is for an embedded device
that spends most of its time doing DMA. Almost all of main memory is
allocated as an I/O buffer right after booting. I don't actually need
high-order allocations, but since Linux supports it, I use it to reduce
the number of scatter/gather entries and associated overhead. Works
great most of the time, except when I hit this bug.
Tony
prev parent reply other threads:[~2008-12-29 14:31 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-23 19:38 DEBUG_PAGEALLOC + order-10 alloc/free_pages = lockup Tony Battersby
2008-12-26 9:48 ` Ingo Molnar
2008-12-26 9:55 ` Arjan van de Ven
2008-12-29 14:30 ` Tony Battersby [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4958DF1C.7010002@cybernetics.com \
--to=tonyb@cybernetics.com \
--cc=arjan@linux.intel.com \
--cc=jeremy@goop.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=suresh.b.siddha@intel.com \
--cc=tglx@linutronix.de \
--cc=venkatesh.pallipadi@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.