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]
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