| From: |
| Peter Zijlstra <a.p.zijlstra@chello.nl> |
| To: |
| Linus Torvalds <torvalds@linux-foundation.org> |
| Subject: |
| [RFC][PATCH 0/6] mm, highmem: kmap_atomic rework |
| Date: |
| Thu, 19 Aug 2010 22:13:17 +0200 |
| Message-ID: |
| <20100819201317.673172547@chello.nl> |
| Cc: |
| Andrew Morton <akpm@linux-foundation.org>,
Ingo Molnar <mingo@elte.hu>,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Russell King <rmk@arm.linux.org.uk>,
David Howells <dhowells@redhat.com>,
Ralf Baechle <ralf@linux-mips.org>,
David Miller <davem@davemloft.net>,
Paul Mackerras <paulus@samba.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Hugh Dickins <hughd@google.com>, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, linux-arch@vger.kernel.org,
Peter Zijlstra <a.p.zijlstra@chello.nl> |
| Archive‑link: | |
Article |
This patch-set reworks the kmap_atomic API to be a stack based, instead of
static slot based. Some might remember this from last year, some not ;-)
The advantage is that you no longer need to worry about KM_foo, the
disadvantage is that kmap_atomic/kunmap_atomic now needs to be strictly
nested (CONFIG_HIGHMEM_DEBUG should complain in case its not) -- and of
course its a big massive patch changing a widely used API.
The patch-set is currently based on tip/master as of today, and compile
tested on: i386-all{mod,yes}config, mips-yosemite_defconfig,
sparc-sparc32_defconfig, powerpc-ppc6xx_defconfig, and some arm config.
(Sorry dhowells, I again couldn't find frv/mn10300 compilers)
Boot tested with i386-defconfig on kvm.
Since its a rather large set, and somewhat tedious to rebase, I wanted to
ask how to go about getting this merged?
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