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Andrew Morton 46666d8ac4 revert "mm: vmalloc use mutex for purge" 
Revert commit e97a630eb0f5b8b380fd67504de6cedebb489003 ("mm: vmalloc use
mutex for purge")

Bryan Donlan reports:

: After testing 2.6.29-rc1 on xen-x86 with a btrfs root filesystem, I
: got the OOPS quoted below and a hard freeze shortly after boot.
: Boot messages and config are attached.
:
: ------------[ cut here ]------------
: Kernel BUG at c05ef80d [verbose debug info unavailable]
: invalid opcode: 0000 [#1] SMP
: last sysfs file: /sys/block/xvdc/size
: Modules linked in:
:
: Pid: 0, comm: swapper Not tainted (2.6.29-rc1 #6)
: EIP: 0061:[<c05ef80d>] EFLAGS: 00010087 CPU: 2
: EIP is at schedule+0x7cd/0x950
: EAX: d5aeca80 EBX: 00000002 ECX: 00000000 EDX: d4cb9a40
: ESI: c12f5600 EDI: d4cb9a40 EBP: d6033fa4 ESP: d6033ef4
:  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0069
: Process swapper (pid: 0, ti=d6032000 task=d6020b70 task.ti=d6032000)
: Stack:
:  000d85bc 00000000 000186a0 00000000 0dd11410 c0105417 c12efe00 0dc367c3
:  00000011 c0105d46 d5a5d310 deadbeef d4cb9a40 c07cc600 c05f1340 c12e0060
:  deadbeef d6020b70 d6020d08 00000002 c014377d 00000000 c12f5600 00002c22
: Call Trace:
:  [<c0105417>] xen_force_evtchn_callback+0x17/0x30
:  [<c0105d46>] check_events+0x8/0x12
:  [<c05f1340>] _spin_unlock_irqrestore+0x20/0x40
:  [<c014377d>] hrtimer_start_range_ns+0x12d/0x2e0
:  [<c014c4f6>] tick_nohz_restart_sched_tick+0x146/0x160
:  [<c0107485>] cpu_idle+0xa5/0xc0

and bisected it to this commit.

Let's remove it now while we have a think about the problem.

Reported-by: Bryan Donlan <bdonlan@gmail.com>
Tested-by: Christophe Saout <christophe@saout.de>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-15 16:39:40 -08:00
..
allocpercpu.c
mm/allocpercpu.c: make 4 functions static
2008-07-26 12:00:12 -07:00
backing-dev.c
Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-01-06 17:10:04 -08:00
bootmem.c
bootmem: print request details before BUG_ON(them)
2009-01-06 15:59:10 -08:00
bounce.c
bounce: don't rely on a zeroed bio_vec list
2008-12-29 08:29:52 +01:00
dmapool.c
dmapool: enable debugging for CONFIG_SLUB_DEBUG_ON too
2008-04-28 08:58:20 -07:00
fadvise.c
[CVE-2009-0029] System call wrapper special cases
2009-01-14 14:15:18 +01:00
failslab.c
SLUB: failslab support
2008-12-29 11:27:46 +02:00
filemap_xip.c
badpage: remove vma from page_remove_rmap
2009-01-06 15:59:07 -08:00
filemap.c
[CVE-2009-0029] System call wrapper special cases
2009-01-14 14:15:18 +01:00
fremap.c
[CVE-2009-0029] System call wrappers part 13
2009-01-14 14:15:23 +01:00
highmem.c
x86, pat: avoid highmem cache attribute aliasing
2008-08-15 17:22:57 +02:00
hugetlb.c
mm: hugetlb: remove redundant `if' operation
2009-01-06 15:59:10 -08:00
internal.h
mm: make get_user_pages() interruptible
2009-01-06 15:59:08 -08:00
Kconfig
Remove obsolete CONFIG_RESOURCES_64BIT
2009-01-06 15:59:14 -08:00
maccess.c
kgdb: fix optional arch functions and probe_kernel_*
2008-04-17 20:05:39 +02:00
madvise.c
[CVE-2009-0029] System call wrappers part 14
2009-01-14 14:15:24 +01:00
Makefile
shmem: unify regular and tiny shmem
2009-01-06 15:59:08 -08:00
memcontrol.c
memcg: make oom less frequently
2009-01-15 16:39:39 -08:00
memory_hotplug.c
mm: remove GFP_HIGHUSER_PAGECACHE
2009-01-06 15:59:01 -08:00
memory.c
x86 PAT: change track_pfn_vma_new to take pgprot_t pointer param
2009-01-13 19:13:01 +01:00
mempolicy.c
[CVE-2009-0029] System call wrappers part 28
2009-01-14 14:15:30 +01:00
mempool.c
spelling fixes: mm/
2007-10-20 01:27:18 +02:00
migrate.c
[CVE-2009-0029] System call wrappers part 28
2009-01-14 14:15:30 +01:00
mincore.c
[CVE-2009-0029] System call wrappers part 14
2009-01-14 14:15:24 +01:00
mlock.c
[CVE-2009-0029] System call wrappers part 14
2009-01-14 14:15:24 +01:00
mm_init.c
mm: mminit_loglevel cannot be __meminitdata anymore
2008-08-20 15:40:30 -07:00
mmap.c
[CVE-2009-0029] System call wrappers part 13
2009-01-14 14:15:23 +01:00
mmu_notifier.c
mmu-notifiers: core
2008-07-28 16:30:21 -07:00
mmzone.c
mm: mark the correct zone as full when scanning zonelists
2008-09-13 14:41:52 -07:00
mprotect.c
[CVE-2009-0029] System call wrappers part 13
2009-01-14 14:15:23 +01:00
mremap.c
[CVE-2009-0029] System call wrappers part 13
2009-01-14 14:15:23 +01:00
msync.c
[CVE-2009-0029] System call wrappers part 13
2009-01-14 14:15:23 +01:00
nommu.c
[CVE-2009-0029] System call wrappers part 13
2009-01-14 14:15:23 +01:00
oom_kill.c
memcg: avoid deadlock caused by race between oom and cpuset_attach
2009-01-08 08:31:09 -08:00
page_alloc.c
mm: introduce zone_reclaim struct
2009-01-08 08:31:07 -08:00
page_cgroup.c
memcg: add mem_cgroup_disabled()
2009-01-08 08:31:05 -08:00
page_io.c
mm: try_to_free_swap replaces remove_exclusive_swap_page
2009-01-06 15:59:03 -08:00
page_isolation.c
memory hotplug: fix page_zone() calculation in test_pages_isolated()
2008-11-06 15:41:19 -08:00
page-writeback.c
mm: add dirty_background_bytes and dirty_bytes sysctls
2009-01-06 15:59:03 -08:00
pagewalk.c
pagemap: pass mm into pagewalkers
2008-06-12 18:05:41 -07:00
pdflush.c
cpumask: convert mm/
2009-01-01 10:12:29 +10:30
prio_tree.c
spelling fixes: mm/
2007-10-20 01:27:18 +02:00
quicklist.c
mm: size of quicklists shouldn't be proportional to the number of CPUs
2008-09-02 19:21:38 -07:00
readahead.c
vmscan: split LRU lists into anon & file sets
2008-10-20 08:50:25 -07:00
rmap.c
badpage: remove vma from page_remove_rmap
2009-01-06 15:59:07 -08:00
shmem_acl.c
[PATCH] sanitize ->permission() prototype
2008-07-26 20:53:14 -04:00
shmem.c
memcg: fix shmem's swap accounting
2009-01-08 08:31:10 -08:00
slab.c
cpumask: convert mm/
2009-01-01 10:12:29 +10:30
slob.c
slob: do not pass the SLAB flags as GFP in kmem_cache_create()
2008-12-15 16:27:06 -08:00
slub.c
trivial: fix an -> a typos in documentation and comments
2009-01-06 11:28:07 +01:00
sparse-vmemmap.c
vmemmap: warn about page_structs with remote distance
2008-11-06 15:41:19 -08:00
sparse.c
meminit section warnings
2008-11-30 10:03:35 -08:00
swap_state.c
memcg: mem+swap controller core
2009-01-08 08:31:05 -08:00
swap.c
memcg: add zone_reclaim_stat
2009-01-08 08:31:08 -08:00
swapfile.c
[CVE-2009-0029] System call wrappers part 26
2009-01-14 14:15:29 +01:00
thrash.c
Bug in mm/thrash.c function grab_swap_token()
2007-05-11 08:29:32 -07:00
truncate.c
mmap: handle mlocked pages during map, remap, unmap
2008-10-20 08:52:31 -07:00
util.c
mm: Make generic weak get_user_pages_fast and EXPORT_GPL it
2008-08-12 17:52:53 +10:00
vmalloc.c
revert "mm: vmalloc use mutex for purge"
2009-01-15 16:39:40 -08:00
vmscan.c
memcg: fix calculation of active_ratio
2009-01-08 08:31:09 -08:00
vmstat.c
cpumask: convert mm/
2009-01-01 10:12:29 +10:30