From: Johannes Weiner <hannes@saeurebad.de>
To: Andi Kleen <andi@firstfloor.org>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Ingo Molnar <mingo@elte.hu>, Yinghai Lu <yhlu.kernel@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Yasunori Goto <y-goto@jp.fujitsu.com>
Subject: Re: [rfc][patch 0/3] bootmem2: a memory block-oriented boot time allocator
Date: Tue, 06 May 2008 10:57:12 +0200 [thread overview]
Message-ID: <87r6cflsif.fsf@saeurebad.de> (raw)
In-Reply-To: <481F58DD.9000600@firstfloor.org> (Andi Kleen's message of "Mon, 05 May 2008 20:58:37 +0200")
Hi,
Andi Kleen <andi@firstfloor.org> writes:
>> (because a PFN is not unique anymore)
>
> That doesn't make sense. If a PFN is not uniquely mapping to a single
> memory page anymore the VM and lots of other code in the kernel will
> just not work. And each memory page can be only in a single node.
I meant it is not unique to the bootmem allocator because two bitmaps
might partially represent the same page range.
Hannes
WARNING: multiple messages have this Message-ID (diff)
From: Johannes Weiner <hannes@saeurebad.de>
To: Andi Kleen <andi@firstfloor.org>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Ingo Molnar <mingo@elte.hu>, Yinghai Lu <yhlu.kernel@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Yasunori Goto <y-goto@jp.fujitsu.com>
Subject: Re: [rfc][patch 0/3] bootmem2: a memory block-oriented boot time allocator
Date: Tue, 06 May 2008 10:57:12 +0200 [thread overview]
Message-ID: <87r6cflsif.fsf@saeurebad.de> (raw)
In-Reply-To: <481F58DD.9000600@firstfloor.org> (Andi Kleen's message of "Mon, 05 May 2008 20:58:37 +0200")
Hi,
Andi Kleen <andi@firstfloor.org> writes:
>> (because a PFN is not unique anymore)
>
> That doesn't make sense. If a PFN is not uniquely mapping to a single
> memory page anymore the VM and lots of other code in the kernel will
> just not work. And each memory page can be only in a single node.
I meant it is not unique to the bootmem allocator because two bitmaps
might partially represent the same page range.
Hannes
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next prev parent reply other threads:[~2008-05-06 9:04 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-05 9:59 [rfc][patch 0/3] bootmem2: a memory block-oriented boot time allocator Johannes Weiner
2008-05-05 9:59 ` Johannes Weiner
2008-05-05 9:59 ` [rfc][patch 1/3] mm: Define NR_NODE_MEMBLKS unconditionally Johannes Weiner
2008-05-05 9:59 ` Johannes Weiner
2008-05-05 9:59 ` [rfc][patch 2/3] mm: bootmem2 - memory block oriented boot time allocator Johannes Weiner
2008-05-05 9:59 ` Johannes Weiner
2008-05-05 9:59 ` [rfc][patch 3/3] x86: Use bootmem2 on x86_32 Johannes Weiner
2008-05-05 9:59 ` Johannes Weiner
2008-05-05 11:23 ` [rfc][patch 0/3] bootmem2: a memory block-oriented boot time allocator Johannes Weiner
2008-05-05 11:23 ` Johannes Weiner
2008-05-05 15:23 ` Linus Torvalds
2008-05-05 15:23 ` Linus Torvalds
2008-05-05 16:04 ` Robin Holt
2008-05-05 16:04 ` Robin Holt
2008-05-06 9:00 ` Johannes Weiner
2008-05-06 9:00 ` Johannes Weiner
2008-05-05 18:58 ` Andi Kleen
2008-05-05 18:58 ` Andi Kleen
2008-05-06 8:57 ` Johannes Weiner [this message]
2008-05-06 8:57 ` Johannes Weiner
2008-05-07 12:29 ` [RFC no patch yet] bootmem2: Another try Johannes Weiner
2008-05-07 12:29 ` Johannes Weiner
2008-05-07 14:37 ` Linus Torvalds
2008-05-07 14:37 ` Linus Torvalds
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