From: Jiri Slaby <jslaby@suse.cz>
To: Johannes Weiner <hannes@cmpxchg.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Ralf Baechle <ralf@linux-mips.org>,
x86@kernel.org, stable@kernel.org
Subject: Re: [PATCH] bootmem: avoid DMA32 zone by default
Date: Thu, 21 Jan 2010 00:12:20 +0100 [thread overview]
Message-ID: <4B578DD4.90908@suse.cz> (raw)
In-Reply-To: <1264027998-15257-1-git-send-email-hannes@cmpxchg.org>
On 01/20/2010 11:53 PM, Johannes Weiner wrote:
> I cc'd stable because this affects already released kernels. But since this is
> the first report of DMA32 memory exhaustion through bootmem that I hear of,
Just for how the setup look like:
128G of RAM, flat mapping
sizeof(struct page)=56
0-1.75G mem_map
1.75-2G vfs caches, console and others. initrd reservation
2-4G reserved by BIOS
Kernel panics with out of memory when swiotlb tries to allocate 64M of
"low" bootmem.
--
js
suse labs
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prev parent reply other threads:[~2010-01-20 23:12 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-18 22:56 [RFC 1/1] bootmem: move big allocations behing 4G Jiri Slaby
2010-01-19 14:33 ` Johannes Weiner
2010-01-19 22:02 ` Jiri Slaby
2010-01-20 13:50 ` Jiri Slaby
2010-01-20 15:30 ` Johannes Weiner
2010-01-20 22:53 ` [PATCH] bootmem: avoid DMA32 zone by default Johannes Weiner
2010-01-20 23:12 ` Jiri Slaby [this message]
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