From: Ingo Molnar <mingo@elte.hu>
To: Jan Beulich <JBeulich@novell.com>
Cc: bernhard.walle@gmx.de, Thomas Gleixner <tglx@linutronix.de>,
hpa@zytor.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] don't use alloc_bootmem_low() where not strictly needed
Date: Wed, 1 Jul 2009 00:03:18 +0200 [thread overview]
Message-ID: <20090630220318.GC1241@elte.hu> (raw)
In-Reply-To: <4A4A111A020000780000831A@vpn.id2.novell.com>
* Jan Beulich <JBeulich@novell.com> wrote:
> Since alloc_bootmem() will never return inaccessible (via virtual
> addressing) memory anyway, using the ..._low() variant only makes
> sense when the physical address range of the allocated memory must
> fulfill further constraints, espacially since on 64-bits (or more
> generally in all cases where the pools the two variants allocate
> from are different), the space available for ..._low() is more
> easily exhausted than the full available range.
hm, i have some vague memories of the _low() being relevant for
things like PAGEALLOC stability. Thomas, do you remember anything
specific there?
Ingo
next prev parent reply other threads:[~2009-06-30 22:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-30 11:20 [PATCH] don't use alloc_bootmem_low() where not strictly needed Jan Beulich
2009-06-30 22:03 ` Ingo Molnar [this message]
-- strict thread matches above, loose matches on Subject: below --
2009-08-18 15:54 Jan Beulich
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