Hugh Dickins cb5f7b9a47 tmpfs: make shmem_unuse more preemptible ... shmem_unuse is at present an unbroken search through every swap vector page of every tmpfs file which might be swapped, all under shmem_swaplist_lock. This dates from long ago, when the caller held mmlist_lock over it all too: long gone, but there's never been much pressure for preemptible swapoff. Make it a little more preemptible, replacing shmem_swaplist_lock by shmem_swaplist_mutex, inserting a cond_resched in the main loop, and a cond_resched_lock (on info->lock) at one convenient point in the shmem_unuse_inode loop, where it has no outstanding kmap_atomic. If we're serious about preemptible swapoff, there's much further to go e.g. I'm stupid to let the kmap_atomics of the decreasingly significant HIGHMEM case dictate preemptiblility for other configs. But as in the earlier patch to make swapoff scan ptes preemptibly, my hidden agenda is really towards making memcgroups work, hardly about preemptibility at all. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2008-02-05 09:44:15 -08:00
..
allocpercpu.c	Slab allocators: Replace explicit zeroing with __GFP_ZERO	2007-07-17 10:23:02 -07:00
backing-dev.c	mm/backing-dev.c: fix percpu_counter_destroy call bug in bdi_init	2007-12-05 09:21:18 -08:00
bootmem.c	[PATCH] remove EXPORT_UNUSED_SYMBOL'ed symbols	2006-12-07 08:39:44 -08:00
bounce.c	block: Initial support for data-less (or empty) barrier support	2007-10-16 11:03:56 +02:00
fadvise.c	[PATCH] mm: change uses of f_{dentry,vfsmnt} to use f_path	2006-12-08 08:28:43 -08:00
filemap.c	fix writev regression: pan hanging unkillable and un-straceable	2008-02-03 07:55:39 +11:00
filemap_xip.c	Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user	2008-02-05 09:44:13 -08:00
fremap.c	sys_remap_file_pages: fix ->vm_file accounting	2008-02-05 09:44:07 -08:00
highmem.c	Create the ZONE_MOVABLE zone	2007-07-17 10:22:59 -07:00
hugetlb.c	fix hugepages leak due to pagetable page sharing	2008-01-24 08:07:27 -08:00
internal.h	Breakout page_order() to internal.h to avoid special knowledge of the buddy allocator	2007-10-16 09:43:01 -07:00
Kconfig	sh: Bump number of quicklists for SH-5.	2008-01-28 13:18:55 +09:00
madvise.c	speed up madvise_need_mmap_write() usage	2007-07-16 09:05:36 -07:00
Makefile	memory unplug: page isolation	2007-10-16 09:43:02 -07:00
memory.c	swapin needs gfp_mask for loop on tmpfs	2008-02-05 09:44:14 -08:00
memory_hotplug.c	Add IORESOUCE_BUSY flag for System RAM	2007-11-14 18:45:39 -08:00
mempolicy.c	Migration: find correct vma in new_vma_page()	2007-11-14 18:45:38 -08:00
mempool.c	spelling fixes: mm/	2007-10-20 01:27:18 +02:00
migrate.c	Typo fixes retrun -> return	2007-10-20 02:13:26 +02:00
mincore.c	[PATCH] mincore: vma crossing fix	2007-02-15 09:57:03 -08:00
mlock.c	do not limit locked memory when RLIMIT_MEMLOCK is RLIM_INFINITY	2007-07-16 09:05:37 -07:00
mmap.c	vm audit: add VM_DONTEXPAND to mmap for drivers that need it	2008-02-04 07:55:38 -08:00
mmzone.c	[PATCH] remove EXPORT_UNUSED_SYMBOL'ed symbols	2006-12-07 08:39:44 -08:00
mprotect.c	fix mprotect vma_wants_writenotify prot	2007-10-23 08:32:06 -07:00
mremap.c	sparse pointer use of zero as null	2007-10-18 14:37:31 -07:00
msync.c	Detach sched.h from mm.h	2007-05-21 09:18:19 -07:00
nommu.c	vmalloc: add const to void* parameters	2008-02-05 09:44:14 -08:00
oom_kill.c	sched: sched_rt_entity	2008-01-25 21:08:27 +01:00
page-writeback.c	Revert "writeback: introduce writeback_control.more_io to indicate more io"	2008-01-14 21:21:29 -08:00
page_alloc.c	mm: fix section mismatch warning in page_alloc.c	2008-01-17 15:38:58 -08:00
page_io.c	Drop 'size' argument from bio_endio and bi_end_io	2007-10-10 09:25:57 +02:00
page_isolation.c	memory hotremove: unset migrate type "ISOLATE" after removal	2007-11-14 18:45:38 -08:00
pdflush.c	Freezer: make kernel threads nonfreezable by default	2007-07-17 10:23:02 -07:00
prio_tree.c	spelling fixes: mm/	2007-10-20 01:27:18 +02:00
quicklist.c	quicklists: Only consider memory that can be used with GFP_KERNEL	2008-01-14 08:52:22 -08:00
readahead.c	mm: bdi init hooks	2007-10-17 08:42:45 -07:00
rmap.c	[S390] Optimize storage key handling for anonymous pages	2007-11-20 11:13:46 +01:00
shmem.c	tmpfs: make shmem_unuse more preemptible	2008-02-05 09:44:15 -08:00
shmem_acl.c	[PATCH] Fix typos in mm/shmem_acl.c	2006-10-11 11:14:23 -07:00
slab.c	cpu-hotplug: replace per-subsystem mutexes with get_online_cpus()	2008-01-25 21:08:02 +01:00
slob.c	Avoid double memclear() in SLOB/SLUB	2007-12-09 10:17:52 -08:00
slub.c	SLUB: Do not upset lockdep	2008-02-04 10:56:02 -08:00
sparse-vmemmap.c	memory hotplug fix: fix section mismatch in vmammap_allock_block()	2007-11-29 09:24:54 -08:00
sparse.c	is_vmalloc_addr(): Check if an address is within the vmalloc boundaries	2008-02-05 09:44:14 -08:00
swap.c	spelling fixes: mm/	2007-10-20 01:27:18 +02:00
swap_state.c	tmpfs: move swap swizzling into shmem	2008-02-05 09:44:15 -08:00
swapfile.c	swapoff: scan ptes preemptibly	2008-02-05 09:44:15 -08:00
thrash.c	Bug in mm/thrash.c function grab_swap_token()	2007-05-11 08:29:32 -07:00
tiny-shmem.c	r/o bind mounts: filesystem helpers for custom 'struct file's	2007-10-17 08:43:04 -07:00
truncate.c	Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user	2008-02-05 09:44:13 -08:00
util.c	fix mm/util.c:krealloc()	2007-11-14 18:45:41 -08:00
vmalloc.c	vmalloc: clean up page array indexing	2008-02-05 09:44:14 -08:00
vmscan.c	spelling fixes: mm/	2007-10-20 01:27:18 +02:00
vmstat.c	vmstat: fix section mismatch warning	2007-11-14 18:45:42 -08:00