diff options
| author | Christoph Lameter <clameter@sgi.com> | 2006-01-08 01:00:47 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-08 20:12:41 -0800 |
| commit | 930d915252edda7042c944ed3c30194a2f9fe163 (patch) | |
| tree | 620452f11a9949943765b7a28e5b919f40f32b12 /mm/vmscan.c | |
| parent | 21eac81f252fe31c3cf64b805a1e8652192f3a3b (diff) | |
| download | lwn-930d915252edda7042c944ed3c30194a2f9fe163.tar.gz lwn-930d915252edda7042c944ed3c30194a2f9fe163.zip | |
[PATCH] Swap Migration V5: PF_SWAPWRITE to allow writing to swap
Add PF_SWAPWRITE to control a processes permission to write to swap.
- Use PF_SWAPWRITE in may_write_to_queue() instead of checking for kswapd
and pdflush
- Set PF_SWAPWRITE flag for kswapd and pdflush
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index 261a56ee11b6..6c30a8c59795 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -268,9 +268,7 @@ static inline int is_page_cache_freeable(struct page *page) static int may_write_to_queue(struct backing_dev_info *bdi) { - if (current_is_kswapd()) - return 1; - if (current_is_pdflush()) /* This is unlikely, but why not... */ + if (current->flags & PF_SWAPWRITE) return 1; if (!bdi_write_congested(bdi)) return 1; @@ -1299,7 +1297,7 @@ static int kswapd(void *p) * us from recursively trying to free more memory as we're * trying to free the first piece of memory in the first place). */ - tsk->flags |= PF_MEMALLOC|PF_KSWAPD; + tsk->flags |= PF_MEMALLOC | PF_SWAPWRITE | PF_KSWAPD; order = 0; for ( ; ; ) { |