diff options
| author | David S. Miller <davem@davemloft.net> | 2011-06-20 22:29:08 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-06-20 22:29:08 -0700 |
| commit | 9f6ec8d697c08963d83880ccd35c13c5ace716ea (patch) | |
| tree | ad8d93cf6fcdd09b86ade09f5fcbbc66cdb1cca2 /mm/vmscan.c | |
| parent | 4aa3a715551c93eda32d79bd52042ce500bd5383 (diff) | |
| parent | 56299378726d5f2ba8d3c8cbbd13cb280ba45e4f (diff) | |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts:
drivers/net/wireless/iwlwifi/iwl-agn-rxon.c
drivers/net/wireless/rtlwifi/pci.c
net/netfilter/ipvs/ip_vs_core.c
Diffstat (limited to 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index faa0a088f9cc..8ff834e19c24 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1124,8 +1124,20 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan, nr_lumpy_dirty++; scan++; } else { - /* the page is freed already. */ - if (!page_count(cursor_page)) + /* + * Check if the page is freed already. + * + * We can't use page_count() as that + * requires compound_head and we don't + * have a pin on the page here. If a + * page is tail, we may or may not + * have isolated the head, so assume + * it's not free, it'd be tricky to + * track the head status without a + * page pin. + */ + if (!PageTail(cursor_page) && + !atomic_read(&cursor_page->_count)) continue; break; } @@ -2081,7 +2093,7 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist, for (priority = DEF_PRIORITY; priority >= 0; priority--) { sc->nr_scanned = 0; if (!priority) - disable_swap_token(); + disable_swap_token(sc->mem_cgroup); total_scanned += shrink_zones(priority, zonelist, sc); /* * Don't shrink slabs when reclaiming memory from @@ -2407,7 +2419,7 @@ loop_again: /* The swap token gets in the way of swapout... */ if (!priority) - disable_swap_token(); + disable_swap_token(NULL); all_zones_ok = 1; balanced = 0; |