From: Linus Torvalds <torvalds@linux-foundation.org>
To: Nick Piggin <npiggin@suse.de>
Cc: Jared Hulbert <jaredeh@gmail.com>,
carsteno@de.ibm.com, Andrew Morton <akpm@linux-foundation.org>,
mschwid2@linux.vnet.ibm.com, heicars2@linux.vnet.ibm.com,
linux-mm@kvack.org, linux-fsdevel@vger.kernel.org
Subject: Re: [patch 4/6] xip: support non-struct page backed memory
Date: Mon, 3 Mar 2008 14:21:50 -0800 (PST) [thread overview]
Message-ID: <alpine.LFD.1.00.0803031420430.2979@woody.linux-foundation.org> (raw)
In-Reply-To: <20080303203202.GI8974@wotan.suse.de>
On Mon, 3 Mar 2008, Nick Piggin wrote:
>
> Although they were already using kernel-virtual addresses before I got
> there, we want to remove the requirement to have a struct page, and
> there are no good accessors to kmap a pfn (AFAIK) otherwise we could
> indeed just use a pfn.
Implementing a kmap_pfn() sounds like a perfectly sane idea. But why does
it need to even be mapped into kernel space? Is it for the ELF header
reading or something (not having looked at the patch, just reacting to the
wrongness of using virt_to_phys())?
Linus
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next prev parent reply other threads:[~2008-03-03 22:21 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20080118045649.334391000@suse.de>
2008-01-18 4:56 ` [patch 1/6] mm: introduce VM_MIXEDMAP npiggin, Jared Hulbert
2008-01-18 4:56 ` [patch 2/6] mm: introduce pte_special pte bit npiggin
2008-01-18 16:41 ` Linus Torvalds
2008-01-18 18:04 ` Sam Ravnborg
2008-01-18 18:28 ` Linus Torvalds
2008-01-18 18:53 ` Sam Ravnborg
2008-01-18 22:46 ` Nick Piggin
2008-01-18 23:03 ` Linus Torvalds
2008-01-19 5:07 ` Nick Piggin
2008-01-21 9:43 ` Nick Piggin
2008-01-18 4:56 ` [patch 3/6] mm: add vm_insert_mixed npiggin
2008-01-18 4:56 ` [patch 4/6] xip: support non-struct page backed memory npiggin
2008-03-01 8:14 ` Jared Hulbert
2008-03-03 5:29 ` Nick Piggin
2008-03-03 8:30 ` Carsten Otte
2008-03-03 15:59 ` Jared Hulbert
2008-03-03 8:18 ` Carsten Otte
2008-03-03 15:44 ` Jared Hulbert
2008-03-03 18:40 ` Linus Torvalds
2008-03-03 19:38 ` Jared Hulbert
2008-03-03 20:04 ` Linus Torvalds
2008-03-03 20:32 ` Nick Piggin
2008-03-03 22:21 ` Linus Torvalds [this message]
2008-03-03 23:25 ` Jared Hulbert
2008-03-04 9:06 ` Carsten Otte
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