From: "Jared Hulbert" <jaredeh@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Carsten Otte <cotte@de.ibm.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
linux-mm@kvack.org, Nick Piggin <nickpiggin@yahoo.com.au>
Subject: Re: [patch 0/7] [rfc] VM_MIXEDMAP, pte_special, xip work
Date: Wed, 12 Mar 2008 10:10:12 -0700 [thread overview]
Message-ID: <6934efce0803121010y6f541a51tf0cd18399160dace@mail.gmail.com> (raw)
In-Reply-To: <20080311213525.a5994894.akpm@linux-foundation.org>
> umm, could we have some executive summary about what this is all supposed
> to achieve? I can see what each patch does, but what's the overall result?
We talked about this a couple years back at the Embedded Linux
Conference. In response to my whining about how ugly XIP hacks were
preventing me from merging my AXFS filesystem, you said, "We have an
XIP framework. Why don't you fix that?"
This is fixing the the XIP framework.
The old XIP framework just didn't work for embedded, mostly because it
was page based. Nick decided to help and proposed a way to rework the
XIP framework to be pfn based instead of page based. It turns out the
s390 guys (creators and only users of the XIP framework) prefer the
pfn based scheme. Now the creators and only users of the XIP
framework are excited about the very changes which allow the framework
to be used by us deviant embedded types. Everyone is happy!
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prev parent reply other threads:[~2008-03-12 17:10 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-11 10:46 [patch 0/7] [rfc] VM_MIXEDMAP, pte_special, xip work npiggin
2008-03-11 10:46 ` [patch 1/7] mm: introduce VM_MIXEDMAP npiggin, Jared Hulbert
2008-03-11 10:46 ` [patch 2/7] mm: introduce pte_special pte bit npiggin
2008-03-11 10:46 ` [patch 3/7] mm: add vm_insert_mixed npiggin
2008-03-11 10:46 ` [patch 4/7] Alter the block device ->direct_access() API to work with the new get_xip_mem() API (that requires both kaddr and pfn are returned) npiggin
2008-03-11 10:46 ` [patch 5/7] xip: support non-struct page backed memory npiggin
2008-03-11 11:44 ` [patch 0/7] [rfc] VM_MIXEDMAP, pte_special, xip work Nick Piggin
2008-03-11 21:12 ` Jared Hulbert
2008-03-11 23:21 ` Nick Piggin
2008-03-12 4:35 ` Andrew Morton
2008-03-12 5:33 ` Nick Piggin
2008-03-12 8:46 ` Martin Schwidefsky
2008-03-12 16:40 ` Jared Hulbert
2008-03-12 17:10 ` Jared Hulbert [this message]
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