Seth Jennings 2f772e6cad mm: break up swap_writepage() for frontswap backends ...

swap_writepage() is currently where frontswap hooks into the swap write
path to capture pages with the frontswap_store() function.  However, if
a frontswap backend wants to "resume" the writeback of a page to the
swap device, it can't call swap_writepage() as the page will simply
reenter the backend.

This patch separates swap_writepage() into a top and bottom half, the
bottom half named __swap_writepage() to allow a frontswap backend, like
zswap, to resume writeback beyond the frontswap_store() hook.

__add_to_swap_cache() is also made non-static so that the page for which
writeback is to be resumed can be added to the swap cache.

Signed-off-by: Seth Jennings <sjenning@linux.vnet.ibm.com>
Signed-off-by: Bob Liu <bob.liu@oracle.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Reviewed-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2013-04-29 15:54:38 -07:00

..

backing-dev.c

bdi: allow block devices to say that they require stable page writes

2013-02-21 17:22:19 -08:00

balloon_compaction.c

mm: introduce a common interface for balloon pages mobility

2012-12-11 17:22:26 -08:00

bootmem.c

mm: Add alloc_bootmem_low_pages_nopanic()

2013-01-29 19:32:59 -08:00

bounce.c

mm: make snapshotting pages for stable writes a per-bio operation

2013-04-29 15:54:33 -07:00

cleancache.c

fs: encode_fh: return FILEID_INVALID if invalid fid_type

2013-02-26 02:46:10 -05:00

compaction.c

mm: add & use zone_end_pfn() and zone_spans_pfn()

2013-02-23 17:50:20 -08:00

debug-pagealloc.c

mm, x86: Remove debug_pagealloc_enabled

2011-12-06 09:24:07 +01:00

dmapool.c

dmapool: make DMAPOOL_DEBUG detect corruption of free marker

2012-12-11 17:22:24 -08:00

fadvise.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2013-02-26 20:16:07 -08:00

failslab.c

switch debugfs to umode_t

2012-01-03 22:54:56 -05:00

filemap_xip.c

mm: move all mmu notifier invocations to be done outside the PT lock

2012-10-09 16:22:58 +09:00

filemap.c

mm: trace filemap add and del

2013-04-29 15:54:28 -07:00

fremap.c

Revert "mm: introduce VM_POPULATE flag to better deal with racy userspace programs"

2013-03-28 17:45:51 -07:00

frontswap.c

frontswap: support exclusive gets if tmem backend is capable

2012-09-21 10:38:12 -04:00

highmem.c

Some nice cleanups, and even a patch my wife did as a "live" demo for

2012-12-20 08:37:05 -08:00

huge_memory.c

THP: fix comment about memory barrier

2013-04-29 15:54:37 -07:00

hugetlb_cgroup.c

mm/hugetlb: create hugetlb cgroup file in hugetlb_init

2012-12-18 15:02:15 -08:00

hugetlb.c

mm, hugetlb: include hugepages in meminfo

2013-04-29 15:54:35 -07:00

hwpoison-inject.c

memcg: rename config variables

2012-07-31 18:42:43 -07:00

init-mm.c

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -07:00

internal.h

mm: accelerate munlock() treatment of THP pages

2013-02-27 19:10:09 -08:00

interval_tree.c

mm: add CONFIG_DEBUG_VM_RB build option

2012-10-09 16:22:42 +09:00

Kconfig

Select VIRT_TO_BUS directly where needed

2013-03-12 11:16:40 -07:00

Kconfig.debug

mm: more intensive memory corruption debugging

2012-01-10 16:30:42 -08:00

kmemcheck.c

kmemcheck: Fix build errors due to missing slab.h

2010-03-30 22:02:32 +09:00

kmemleak-test.c

kmemleak: remove memset by using kzalloc

2011-01-27 18:31:51 +00:00

kmemleak.c

hlist: drop the node parameter from iterators

2013-02-27 19:10:24 -08:00

ksm.c

ksm: fix m68k build: only NUMA needs pfn_to_nid

2013-03-08 15:05:34 -08:00

maccess.c

mm: Map most files to use export.h instead of module.h

2011-10-31 09:20:12 -04:00

madvise.c

mm: madvise: complete input validation before taking lock

2013-04-29 15:54:37 -07:00

Makefile

memcg: add memory.pressure_level events

2013-04-29 15:54:38 -07:00

memblock.c

memblock: add assertion for zero allocation alignment

2013-04-29 15:54:28 -07:00

memcontrol.c

memcg: add memory.pressure_level events

2013-04-29 15:54:38 -07:00

memory_hotplug.c

mm, hotplug: avoid compiling memory hotremove functions when disabled

2013-04-29 15:54:37 -07:00

memory-failure.c

HWPOISON: check dirty flag to match against clean page

2013-04-29 15:54:28 -07:00

memory.c

THP: fix comment about memory barrier

2013-04-29 15:54:37 -07:00

mempolicy.c

mm/mempolicy.c: fix sp_node_init() argument ordering

2013-03-08 15:05:34 -08:00

mempool.c

mempool: add @gfp_mask to mempool_create_node()

2012-06-25 11:53:47 +02:00

migrate.c

mm: rewrite the comment over migrate_pages() more comprehensibly

2013-04-29 15:54:37 -07:00

mincore.c

swap: make each swap partition have one address_space

2013-02-23 17:50:17 -08:00

mlock.c

Revert "mm: introduce VM_POPULATE flag to better deal with racy userspace programs"

2013-03-28 17:45:51 -07:00

mm_init.c

mm: init: report on last-nid information stored in page->flags

2013-02-23 17:50:18 -08:00

mmap.c

mm/mmap: check for RLIMIT_AS before unmapping

2013-04-29 15:54:38 -07:00

mmu_context.c

mm, counters: remove task argument to sync_mm_rss() and __sync_task_rss_stat()

2012-03-21 17:54:59 -07:00

mmu_notifier.c

hlist: drop the node parameter from iterators

2013-02-27 19:10:24 -08:00

mmzone.c

mm: rename page struct field helpers

2013-02-23 17:50:18 -08:00

mprotect.c

mm/mprotect.c: coding-style cleanups

2012-12-18 15:02:15 -08:00

mremap.c

mm/rmap: rename anon_vma_unlock() => anon_vma_unlock_write()

2013-02-23 17:50:17 -08:00

msync.c

sanitize vfs_fsync calling conventions

2010-05-21 18:31:21 -04:00

nobootmem.c

mm: Add alloc_bootmem_low_pages_nopanic()

2013-01-29 19:32:59 -08:00

nommu.c

mm: replace hardcoded 3% with admin_reserve_pages knob

2013-04-29 15:54:36 -07:00

oom_kill.c

memcg, oom: provide more precise dump info while memcg oom happening

2013-02-23 17:50:08 -08:00

page_alloc.c

page_alloc: make setup_nr_node_ids() usable for arch init code

2013-04-29 15:54:36 -07:00

page_cgroup.c

memcontrol: use N_MEMORY instead N_HIGH_MEMORY

2012-12-12 17:38:32 -08:00

page_io.c

mm: break up swap_writepage() for frontswap backends

2013-04-29 15:54:38 -07:00

page_isolation.c

mm: fix zone_watermark_ok_safe() accounting of isolated pages

2013-01-04 16:11:46 -08:00

page-writeback.c

mm: make snapshotting pages for stable writes a per-bio operation

2013-04-29 15:54:33 -07:00

pagewalk.c

thp: change split_huge_page_pmd() interface

2012-12-12 17:38:31 -08:00

percpu-km.c

percpu: clear memory allocated with the km allocator

2010-10-02 10:28:42 +03:00

percpu-vm.c

mm: fix kernel-doc warnings

2012-06-20 14:39:36 -07:00

percpu.c

mm, percpu: Make sure percpu_alloc early parameter has an argument

2012-12-02 06:23:04 -08:00

pgtable-generic.c

mm: Only flush the TLB when clearing an accessible pte

2012-12-11 14:28:34 +00:00

process_vm_access.c

Fix: compat_rw_copy_check_uvector() misuse in aio, readv, writev, and security keys

2013-03-12 11:05:45 -07:00

quicklist.c

mm: delete various needless include <linux/module.h>

2011-10-31 09:20:11 -04:00

readahead.c

switch simple cases of fget_light to fdget

2012-09-26 22:20:08 -04:00

rmap.c

rmap: recompute pgoff for unmapping huge page

2013-04-29 15:54:28 -07:00

shmem.c

mm/shmem.c: remove an ifdef

2013-04-29 15:54:28 -07:00

slab_common.c

slab: propagate tunable values

2012-12-18 15:02:14 -08:00

slab.c

taint: add explicit flag to show whether lock dep is still OK.

2013-01-21 17:17:57 +10:30

slab.h

slab: propagate tunable values

2012-12-18 15:02:14 -08:00

slob.c

mm: rename page struct field helpers

2013-02-23 17:50:18 -08:00

slub.c

mm/slub.c: use register_hotmemory_notifier()

2013-04-29 15:54:36 -07:00

sparse-vmemmap.c

sparse-vmemmap: specify vmemmap population range in bytes

2013-04-29 15:54:35 -07:00

sparse.c

mm, hotplug: avoid compiling memory hotremove functions when disabled

2013-04-29 15:54:37 -07:00

swap_state.c

mm: break up swap_writepage() for frontswap backends

2013-04-29 15:54:38 -07:00

swap.c

swap: make each swap partition have one address_space

2013-02-23 17:50:17 -08:00

swapfile.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2013-02-26 20:16:07 -08:00

truncate.c

mm: drop vmtruncate

2012-12-20 18:46:29 -05:00

util.c

swap: make each swap partition have one address_space

2013-02-23 17:50:17 -08:00

vmalloc.c

kexec, vmalloc: export additional vmalloc layer information

2013-04-29 15:54:34 -07:00

vmpressure.c

memcg: add memory.pressure_level events

2013-04-29 15:54:38 -07:00

vmscan.c

memcg: add memory.pressure_level events

2013-04-29 15:54:38 -07:00

vmstat.c

mm: remove CONFIG_HOTPLUG ifdefs

2013-04-29 15:54:37 -07:00