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Subject[PATCH] staging: android: lowmemorykiller: Don't wait more than one second for a process to die
From: Arve Hjønnevåg <arve@android.com>

If a process forked and the child process was killed by the
lowmemorykiller, the lowmemory killer would be disabled until
the parent process reaped the child or it died itself.

Signed-off-by: Arve Hjønnevåg <arve@android.com>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
---

Noticed that the patch is missing. Any reason for not wanting it
in staging?

drivers/staging/android/lowmemorykiller.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/staging/android/lowmemorykiller.c b/drivers/staging/android/lowmemorykiller.c
index 2d8d2b7..efc7dc1 100644
--- a/drivers/staging/android/lowmemorykiller.c
+++ b/drivers/staging/android/lowmemorykiller.c
@@ -54,6 +54,7 @@ static size_t lowmem_minfree[6] = {
static int lowmem_minfree_size = 4;

static struct task_struct *lowmem_deathpending;
+static unsigned long lowmem_deathpending_timeout;

#define lowmem_print(level, x...) \
do { \
@@ -103,7 +104,8 @@ static int lowmem_shrink(struct shrinker *s, struct shrink_control *sc)
* Note: Currently you need CONFIG_PROFILING
* for this to work correctly.
*/
- if (lowmem_deathpending)
+ if (lowmem_deathpending &&
+ time_before_eq(jiffies, lowmem_deathpending_timeout))
return 0;

if (lowmem_adj_size < array_size)
@@ -178,6 +180,7 @@ static int lowmem_shrink(struct shrinker *s, struct shrink_control *sc)
*/
#ifdef CONFIG_PROFILING
lowmem_deathpending = selected;
+ lowmem_deathpending_timeout = jiffies + HZ;
task_handoff_register(&task_nb);
#endif
force_sig(SIGKILL, selected);
--
1.7.7.3
--
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