From: Prasad Joshi <prasadjoshi124@gmail.com>
To: akpm@linux-foundation.org, linux-arch@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
prasadjoshi124@gmail.com, mitra@kqinfotech.com
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Subject: [RFC][PATCH v3 00/22] __vmalloc: Propagating GFP allocation flag inside __vmalloc()
Date: Fri, 18 Mar 2011 19:41:35 +0000 [thread overview]
Message-ID: <20110318194135.GA4746@prasad-kvm> (raw)
A filesystem might run into a problem while calling __vmalloc(GFP_NOFS)
inside a lock.
It is expected than __vmalloc when called with GFP_NOFS should not
callback the filesystem code even incase of the increased memory
pressure. But the problem is that even if we pass this flag, __vmalloc
itself allocates memory with GFP_KERNEL.
Using GFP_KERNEL allocations may go into the memory reclaim path and try
to free memory by calling file system evict_inode function. Which might
lead into deadlock.
For further details
http://marc.info/?l=linux-mm&m=128942194520631&w=4
https://bugzilla.kernel.org/show_bug.cgi?id=30702
The patch passes the gfp allocation flag all the way down to those
allocating functions.
arch/arm/include/asm/pgalloc.h | 11 +++++-
arch/avr32/include/asm/pgalloc.h | 8 ++++-
arch/cris/include/asm/pgalloc.h | 10 ++++-
arch/frv/include/asm/pgalloc.h | 3 ++
arch/frv/include/asm/pgtable.h | 1 +
arch/frv/mm/pgalloc.c | 9 ++++-
arch/ia64/include/asm/pgalloc.h | 24 +++++++++++--
arch/m32r/include/asm/pgalloc.h | 11 ++++--
arch/m68k/include/asm/motorola_pgalloc.h | 20 +++++++++--
arch/m68k/include/asm/sun3_pgalloc.h | 14 ++++++--
arch/m68k/mm/memory.c | 9 ++++-
arch/microblaze/include/asm/pgalloc.h | 3 ++
arch/microblaze/mm/pgtable.c | 13 +++++--
arch/mips/include/asm/pgalloc.h | 22 ++++++++----
arch/mn10300/include/asm/pgalloc.h | 2 +
arch/mn10300/mm/pgtable.c | 10 ++++-
arch/parisc/include/asm/pgalloc.h | 21 ++++++++---
arch/powerpc/include/asm/pgalloc-32.h | 2 +
arch/powerpc/include/asm/pgalloc-64.h | 27 +++++++++++---
arch/powerpc/mm/pgtable_32.c | 10 ++++-
arch/s390/include/asm/pgalloc.h | 30 +++++++++++++---
arch/s390/mm/pgtable.c | 22 +++++++++---
arch/score/include/asm/pgalloc.h | 13 ++++---
arch/sh/include/asm/pgalloc.h | 8 ++++-
arch/sh/mm/pgtable.c | 8 ++++-
arch/sparc/include/asm/pgalloc_32.h | 5 +++
arch/sparc/include/asm/pgalloc_64.h | 17 ++++++++-
arch/tile/include/asm/pgalloc.h | 13 ++++++-
arch/tile/mm/pgtable.c | 10 ++++-
arch/um/include/asm/pgalloc.h | 1 +
arch/um/kernel/mem.c | 21 ++++++++---
arch/x86/include/asm/pgalloc.h | 17 ++++++++-
arch/x86/mm/pgtable.c | 8 ++++-
arch/xtensa/include/asm/pgalloc.h | 9 ++++-
arch/xtensa/mm/pgtable.c | 11 +++++-
include/asm-generic/4level-fixup.h | 8 +++-
include/asm-generic/pgtable-nopmd.h | 3 +-
include/asm-generic/pgtable-nopud.h | 1 +
include/linux/mm.h | 40 ++++++++++++++++-----
mm/memory.c | 14 ++++---
mm/vmalloc.c | 57 ++++++++++++++++++++----------
41 files changed, 427 insertions(+), 119 deletions(-)
next reply other threads:[~2011-03-18 19:41 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-18 19:41 Prasad Joshi [this message]
2011-03-18 19:43 ` [RFC][PATCH v3 01/22] mm: Propagating GFP allocation flag inside __vmalloc() Prasad Joshi
2011-03-18 19:46 ` [RFC][PATCH v3 02/22] mm, xtensa: add gfp flags variant of pte allocations Prasad Joshi
2011-03-18 19:47 ` [RFC][PATCH v3 03/22] mm, x86: add gfp flags variant of pud, pmd, and " Prasad Joshi
2011-03-18 19:49 ` [RFC][PATCH v3 04/22] mm, um: add gfp flags variant of pmd " Prasad Joshi
2011-03-18 19:50 ` [RFC][PATCH v3 05/22] mm, tile: " Prasad Joshi
2011-03-18 19:51 ` [RFC][PATCH v3 06/22] mm, sparc: " Prasad Joshi
2011-03-18 19:53 ` [RFC][PATCH v3 07/22] mm, sh: " Prasad Joshi
2011-03-18 19:55 ` [RFC][PATCH v3 08/22] mm, score: add gfp flags variant of " Prasad Joshi
2011-03-18 19:56 ` [RFC][PATCH v3 09/22] mm, s390: add gfp flags variant of pud, pte, and " Prasad Joshi
2011-03-18 19:57 ` [RFC][PATCH v3 10/22] mm, powerpc: " Prasad Joshi
2011-03-18 19:59 ` [RFC][PATCH v3 11/22] mm, parisc: add gfp flags variant of pmd " Prasad Joshi
2011-03-18 20:00 ` [RFC][PATCH v3 12/22] mm, mn10300: add gfp flags variant of " Prasad Joshi
2011-03-18 20:01 ` [RFC][PATCH v3 13/22] mm, mips: add gfp flags variant of pmd and " Prasad Joshi
2011-03-18 20:02 ` [RFC][PATCH v3 14/22] mm, microblaze: " Prasad Joshi
2011-03-18 20:04 ` [RFC][PATCH v3 15/22] mm, m68k: " Prasad Joshi
2011-03-18 20:04 ` [RFC][PATCH v3 16/22] mm, m32r: " Prasad Joshi
2011-03-18 20:05 ` [RFC][PATCH v3 17/22] mm, ia64: add gfp flags variant of pud, " Prasad Joshi
2011-03-18 20:06 ` [RFC][PATCH v3 18/22] mm, frv: " Prasad Joshi
2011-03-18 20:07 ` [RFC][PATCH v3 19/22] mm, cris: add gfp flags variant of " Prasad Joshi
2011-03-18 20:08 ` [RFC][PATCH v3 20/22] mm, avr32: " Prasad Joshi
2011-03-18 20:09 ` [RFC][PATCH v3 21/22] mm, arm: add gfp flags variant of pmd and " Prasad Joshi
2011-03-18 20:10 ` [RFC][PATCH v3 22/22] mm, alpha: " Prasad Joshi
2011-03-21 8:34 ` [RFC][PATCH v3 09/22] mm, s390: add gfp flags variant of pud, pte, " Martin Schwidefsky
2011-03-21 19:02 ` Prasad Joshi
2011-03-22 7:56 ` Martin Schwidefsky
2011-03-22 14:42 ` [RFC][PATCH v3 07/22] mm, sh: add gfp flags variant of pmd " Paul Mundt
[not found] ` <4D83B7F2.4000903@tilera.com>
2011-03-18 20:12 ` [RFC][PATCH v3 05/22] mm, tile: " Prasad Joshi
2011-03-18 22:17 ` [RFC][PATCH v3 03/22] mm, x86: add gfp flags variant of pud, pmd, " David Rientjes
2011-03-21 19:05 ` Prasad Joshi
2011-03-21 20:15 ` David Rientjes
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