Paul E. McKenney 22356f447c mm: Place preemption point in do_mlockall() loop ... There is a loop in do_mlockall() that lacks a preemption point, which means that the following can happen on non-preemptible builds of the kernel. Dave Jones reports: "My fuzz tester keeps hitting this. Every instance shows the non-irq stack came in from mlockall. I'm only seeing this on one box, but that has more ram (8gb) than my other machines, which might explain it. INFO: rcu_preempt self-detected stall on CPU { 3} (t=6500 jiffies g=470344 c=470343 q=0) sending NMI to all CPUs: NMI backtrace for cpu 3 CPU: 3 PID: 29664 Comm: trinity-child2 Not tainted 3.11.0-rc1+ #32 Call Trace: lru_add_drain_all+0x15/0x20 SyS_mlockall+0xa5/0x1a0 tracesys+0xdd/0xe2" This commit addresses this problem by inserting the required preemption point. Reported-by: Dave Jones <davej@redhat.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com> Cc: Michel Lespinasse <walken@google.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2013-09-24 19:44:40 -07:00
..
Kconfig	mm/Kconfig: add MMU dependency for MIGRATION.	2013-09-12 15:38:03 -07:00
Kconfig.debug	…
Makefile	list: add a new LRU list type	2013-09-10 18:56:30 -04:00
backing-dev.c	mm/backing-dev.c: check user buffer length before copying data to the related user buffer	2013-09-11 15:58:03 -07:00
balloon_compaction.c	…
bootmem.c	…
bounce.c	…
cleancache.c	…
compaction.c	mm: compaction: do not compact pgdat for order-0	2013-09-11 15:57:55 -07:00
debug-pagealloc.c	…
dmapool.c	…
fadvise.c	…
failslab.c	…
filemap.c	mm: cleanup add_to_page_cache_locked()	2013-09-12 15:38:03 -07:00
filemap_xip.c	…
fremap.c	…
frontswap.c	…
highmem.c	…
huge_memory.c	Merge branch 'akpm' (patches from Andrew Morton)	2013-09-12 15:44:27 -07:00
hugetlb.c	mm: prepare to remove /proc/sys/vm/hugepages_treat_as_movable	2013-09-11 15:57:49 -07:00
hugetlb_cgroup.c	…
hwpoison-inject.c	mm/hwpoison-inject.c: change permission of corrupt-pfn/unpoison-pfn to 0200	2013-09-11 15:58:11 -07:00
init-mm.c	…
internal.h	mm: vmscan: fix do_try_to_free_pages() livelock	2013-09-11 15:58:01 -07:00
interval_tree.c	…
kmemcheck.c	…
kmemleak-test.c	…
kmemleak.c	mm: replace strict_strtoul() with kstrtoul()	2013-09-11 15:57:11 -07:00
ksm.c	mm: replace strict_strtoul() with kstrtoul()	2013-09-11 15:57:11 -07:00
list_lru.c	list_lru: dynamically adjust node arrays	2013-09-10 18:56:32 -04:00
maccess.c	…
madvise.c	mm/madvise.c:madvise_hwpoison(): remove local `ret'	2013-09-11 15:58:13 -07:00
memblock.c	memblock, numa: binary search node id	2013-09-11 15:57:51 -07:00
memcontrol.c	revert "memcg, vmscan: integrate soft reclaim tighter with zone shrinking code"	2013-09-24 17:00:26 -07:00
memory-failure.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2013-09-12 15:01:38 -07:00
memory.c	thp: consolidate code between handle_mm_fault() and do_huge_pmd_anonymous_page()	2013-09-12 15:38:03 -07:00
memory_hotplug.c	ACPI and power management fixes for 3.12-rc1	2013-09-12 11:22:45 -07:00
mempolicy.c	mbind: add BUG_ON(!vma) in new_vma_page()	2013-09-11 15:57:50 -07:00
mempool.c	mm/mempool.c: convert kmalloc_node(...GFP_ZERO...) to kzalloc_node(...)	2013-09-11 15:58:14 -07:00
migrate.c	Merge git://git.kvack.org/~bcrl/aio-next	2013-09-13 10:55:58 -07:00
mincore.c	…
mlock.c	mm: Place preemption point in do_mlockall() loop	2013-09-24 19:44:40 -07:00
mm_init.c	…
mmap.c	mm/mmap: remove unnecessary assignment	2013-09-11 15:58:13 -07:00
mmu_context.c	…
mmu_notifier.c	…
mmzone.c	…
mprotect.c	…
mremap.c	mm/mremap.c: call pud_free() after fail calling pmd_alloc()	2013-09-11 15:58:03 -07:00
msync.c	…
nobootmem.c	…
nommu.c	…
oom_kill.c	mm: memcg: do not trap chargers with full callstack on OOM	2013-09-12 15:38:02 -07:00
page-writeback.c	memcg: add per cgroup writeback pages accounting	2013-09-12 15:38:02 -07:00
page_alloc.c	mm: correct the comment about the value for buddy _mapcount	2013-09-11 15:58:06 -07:00
page_cgroup.c	…
page_io.c	…
page_isolation.c	mm: memory-hotplug: enable memory hotplug to handle hugepage	2013-09-11 15:57:48 -07:00
pagewalk.c	…
percpu-km.c	…
percpu-vm.c	…
percpu.c	…
pgtable-generic.c	mm: move pgtable related functions to right place	2013-09-11 15:57:30 -07:00
process_vm_access.c	…
quicklist.c	…
readahead.c	readahead: make context readahead more conservative	2013-09-11 15:57:39 -07:00
rmap.c	thp: account anon transparent huge pages into NR_ANON_PAGES	2013-09-12 15:38:03 -07:00
shmem.c	initmpfs: make rootfs use tmpfs when CONFIG_TMPFS enabled	2013-09-11 15:59:37 -07:00
slab.c	…
slab.h	…
slab_common.c	…
slob.c	…
slub.c	Merge branch 'slab/next' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux	2013-09-15 07:15:06 -04:00
sparse-vmemmap.c	…
sparse.c	mm/sparse: introduce alloc_usemap_and_memmap	2013-09-11 15:58:01 -07:00
swap.c	mm: make lru_add_drain_all() selective	2013-09-12 15:38:02 -07:00
swap_state.c	lib/radix-tree.c: make radix_tree_node_alloc() work correctly within interrupt	2013-09-11 15:59:36 -07:00
swapfile.c	swap: make cluster allocation per-cpu	2013-09-11 15:57:17 -07:00
truncate.c	truncate: drop 'oldsize' truncate_pagecache() parameter	2013-09-12 15:38:02 -07:00
util.c	swap: clean-up #ifdef in page_mapping()	2013-09-11 15:57:31 -07:00
vmalloc.c	mm/vmalloc: use wrapper function get_vm_area_size to caculate size of vm area	2013-09-11 15:58:02 -07:00
vmpressure.c	…
vmscan.c	revert "memcg, vmscan: integrate soft reclaim tighter with zone shrinking code"	2013-09-24 17:00:26 -07:00
vmstat.c	mm: vmscan: fix do_try_to_free_pages() livelock	2013-09-11 15:58:01 -07:00
zbud.c	mm/zbud: fix some trivial typos in comments	2013-09-11 15:57:35 -07:00
zswap.c	mm/zswap: use postorder iteration when destroying rbtree	2013-09-11 15:59:21 -07:00