diff options
| -rw-r--r-- | include/linux/gfp.h | 12 | ||||
| -rw-r--r-- | kernel/power/process.c | 5 | ||||
| -rw-r--r-- | mm/page_alloc.c | 4 |
3 files changed, 21 insertions, 0 deletions
diff --git a/include/linux/gfp.h b/include/linux/gfp.h index 4efa330..06b7e8c 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -243,4 +243,16 @@ void drain_zone_pages(struct zone *zone, struct per_cpu_pages *pcp); void drain_all_pages(void); void drain_local_pages(void *dummy); +extern bool oom_killer_disabled; + +static inline void oom_killer_disable(void) +{ + oom_killer_disabled = true; +} + +static inline void oom_killer_enable(void) +{ + oom_killer_disabled = false; +} + #endif /* __LINUX_GFP_H */ diff --git a/kernel/power/process.c b/kernel/power/process.c index ca63401..da2072d 100644 --- a/kernel/power/process.c +++ b/kernel/power/process.c @@ -117,9 +117,12 @@ int freeze_processes(void) if (error) goto Exit; printk("done."); + + oom_killer_disable(); Exit: BUG_ON(in_atomic()); printk("\n"); + return error; } @@ -145,6 +148,8 @@ static void thaw_tasks(bool nosig_only) void thaw_processes(void) { + oom_killer_enable(); + printk("Restarting tasks ... "); thaw_tasks(true); thaw_tasks(false); diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 61290ea..5b09488 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -178,6 +178,8 @@ static void set_pageblock_migratetype(struct page *page, int migratetype) PB_migrate, PB_migrate_end); } +bool oom_killer_disabled __read_mostly; + #ifdef CONFIG_DEBUG_VM static int page_outside_zone_boundaries(struct zone *zone, struct page *page) { @@ -1769,6 +1771,8 @@ rebalance: */ if (!did_some_progress) { if ((gfp_mask & __GFP_FS) && !(gfp_mask & __GFP_NORETRY)) { + if (oom_killer_disabled) + goto nopage; page = __alloc_pages_may_oom(gfp_mask, order, zonelist, high_zoneidx, nodemask, preferred_zone, |