]> git.baikalelectronics.ru Git - kernel.git/commit
x86/mm/kmmio: Fix mmiotrace for hugepages
authorKarol Herbst <nouveau@karolherbst.de>
Thu, 3 Mar 2016 01:03:11 +0000 (02:03 +0100)
committerIngo Molnar <mingo@kernel.org>
Sat, 5 Mar 2016 12:24:41 +0000 (13:24 +0100)
commit22aefc3a92e9559651689fc693cdb9072f615d15
treed84fea206ef44e4874c8177c25b27ef1221ad32e
parent89b54b20d9e434334ceb02f51b4a581da144db7f
x86/mm/kmmio: Fix mmiotrace for hugepages

Because Linux might use bigger pages than the 4K pages to handle those mmio
ioremaps, the kmmio code shouldn't rely on the pade id as it currently does.

Using the memory address instead of the page id lets us look up how big the
page is and what its base address is, so that we won't get a page fault
within the same page twice anymore.

Tested-by: Pierre Moreau <pierre.morrow@free.fr>
Signed-off-by: Karol Herbst <nouveau@karolherbst.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Toshi Kani <toshi.kani@hp.com>
Cc: linux-mm@kvack.org
Cc: linux-x86_64@vger.kernel.org
Cc: nouveau@lists.freedesktop.org
Cc: pq@iki.fi
Cc: rostedt@goodmis.org
Link: http://lkml.kernel.org/r/1456966991-6861-1-git-send-email-nouveau@karolherbst.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/mm/kmmio.c