From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Yinghai Lu <yinghai@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Vivek Goyal <vgoyal@redhat.com>
Subject: Re: [PATCH 0/4] memblock related fixes for -tip
Date: Wed, 13 Oct 2010 16:07:11 -0700 [thread overview]
Message-ID: <4CB63B9F.9060304@goop.org> (raw)
In-Reply-To: <4CB62D54.7000400@kernel.org>
On 10/13/2010 03:06 PM, Yinghai Lu wrote:
> On 10/13/2010 01:03 PM, Jeremy Fitzhardinge wrote:
>>> a) Add an explicit interface to allocate bottoms-up, and have Xen use it
>>> because it needs it. This is appropriate if (and only if) the
>>> allocations in Xen aren't underneath a bunch of extra layers.
>> The allocation is done in find_early_table_space() in x86/mm/init.c, so
>> the allocation call itself can't be easily replaced, but I suppose some
>> of the parameters could be global and tweaked by Xen code, but that's
>> pretty ugly.
> we already have
> base = memblock_find_in_range(start, max_pfn_mapped<<PAGE_SHIFT,
> tables, PAGE_SIZE);
>
> so looks like xen have set max_pfn_mapped wrong?
Hm, I'll double check. But the x86-64 code, at least, doesn't seem to
care whether the allocated memory is mapped or not, since it does
early_ioremap on each page before initializing it anyway.
J
next prev parent reply other threads:[~2010-10-13 23:07 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-04 21:57 [PATCH 0/4] memblock related fixes for -tip Yinghai Lu
2010-10-06 22:52 ` Jeremy Fitzhardinge
2010-10-06 22:57 ` Yinghai Lu
2010-10-06 22:59 ` H. Peter Anvin
2010-10-07 18:31 ` Jeremy Fitzhardinge
2010-11-03 5:05 ` Debug patches for memblock Yinghai Lu
2010-11-03 5:13 ` Jeremy Fitzhardinge
2010-10-12 0:01 ` [tip:core/memblock] memblock: Allow memblock_init to be called early tip-bot for Jeremy Fitzhardinge
2010-10-12 18:41 ` [PATCH 0/4] memblock related fixes for -tip Jeremy Fitzhardinge
2010-10-12 18:45 ` Yinghai Lu
2010-10-12 21:12 ` Yinghai Lu
2010-10-12 21:42 ` Jeremy Fitzhardinge
2010-10-12 21:50 ` H. Peter Anvin
2010-10-12 22:02 ` Yinghai Lu
2010-10-12 21:42 ` H. Peter Anvin
2010-10-12 22:01 ` Yinghai Lu
2010-10-12 22:10 ` H. Peter Anvin
2010-10-12 23:37 ` Jeremy Fitzhardinge
2010-10-13 5:40 ` Yinghai Lu
2010-10-13 16:31 ` Jeremy Fitzhardinge
2010-10-13 18:12 ` Yinghai Lu
2010-10-13 18:20 ` H. Peter Anvin
2010-10-13 20:03 ` Jeremy Fitzhardinge
2010-10-13 21:03 ` H. Peter Anvin
2010-10-13 23:02 ` Jeremy Fitzhardinge
2010-10-13 23:07 ` H. Peter Anvin
2010-10-14 0:31 ` [tip:core/memblock] xen: Cope with unmapped pages when initializing kernel pagetable tip-bot for Jeremy Fitzhardinge
2010-10-13 22:06 ` [PATCH 0/4] memblock related fixes for -tip Yinghai Lu
2010-10-13 23:07 ` Jeremy Fitzhardinge [this message]
2010-10-13 23:14 ` Jeremy Fitzhardinge
2010-10-13 23:18 ` H. Peter Anvin
2010-10-13 23:34 ` Jeremy Fitzhardinge
2010-10-14 0:08 ` Yinghai
2010-10-14 0:24 ` Jeremy Fitzhardinge
2010-10-14 0:27 ` H. Peter Anvin
2010-10-14 0:31 ` [tip:core/memblock] x86-64: Only set max_pfn_mapped to 512 MiB if we enter via head_64.S tip-bot for Jeremy Fitzhardinge
2010-10-14 5:57 ` Ingo Molnar
2010-10-14 5:59 ` Ingo Molnar
2010-10-14 6:06 ` Ingo Molnar
2010-10-14 6:07 ` Yinghai Lu
2010-10-14 6:37 ` Ingo Molnar
2010-10-14 7:03 ` Yinghai Lu
2010-10-14 7:42 ` tip-bot for Jeremy Fitzhardinge
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