Hi Andrew,
Today's linux-next merge of the akpm-current tree got a conflict in
mm/memcontrol.c between commit e61734c55c24 ("cgroup: remove
cgroup->name") from the cgroup tree and commit 05d3a02a1a0d ("memcg:
change oom_info_lock to mutex") from the akpm-current tree.
I fixed it up (see below) and can carry the fix as necessary (no action
is required).
--
Cheers,
Stephen Rothwell sfr@xxxxxxxxxxxxxxxx
diff --cc mm/memcontrol.c
index d9c6ac1532e6,de1a2aed4954..000000000000
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@@ -1683,25 -1683,54 +1683,25 @@@ static void move_unlock_mem_cgroup(stru
*/
void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
{
- /*
- * protects memcg_name and makes sure that parallel ooms do not
- * interleave
- */
+ /* oom_info_lock ensures that parallel ooms do not interleave */
- static DEFINE_SPINLOCK(oom_info_lock);
+ static DEFINE_MUTEX(oom_info_lock);
- struct cgroup *task_cgrp;
- struct cgroup *mem_cgrp;
- static char memcg_name[PATH_MAX];
- int ret;
struct mem_cgroup *iter;
unsigned int i;
if (!p)
return;
- spin_lock(&oom_info_lock);
+ mutex_lock(&oom_info_lock);
rcu_read_lock();
- mem_cgrp = memcg->css.cgroup;
- task_cgrp = task_cgroup(p, mem_cgroup_subsys_id);
-
- ret = cgroup_path(task_cgrp, memcg_name, PATH_MAX);
- if (ret < 0) {
- /*
- * Unfortunately, we are unable to convert to a useful name
- * But we'll still print out the usage information
- */
- rcu_read_unlock();
- goto done;
- }
- rcu_read_unlock();
-
- pr_info("Task in %s killed", memcg_name);
+ pr_info("Task in ");
+ pr_cont_cgroup_path(task_cgroup(p, memory_cgrp_id));
+ pr_info(" killed as a result of limit of ");
+ pr_cont_cgroup_path(memcg->css.cgroup);
+ pr_info("\n");
- rcu_read_lock();
- ret = cgroup_path(mem_cgrp, memcg_name, PATH_MAX);
- if (ret < 0) {
- rcu_read_unlock();
- goto done;
- }
rcu_read_unlock();
- /*
- * Continues from above, so we don't need an KERN_ level
- */
- pr_cont(" as a result of limit of %s\n", memcg_name);
-done:
-
pr_info("memory: usage %llukB, limit %llukB, failcnt %llu\n",
res_counter_read_u64(&memcg->res, RES_USAGE) >> 10,
res_counter_read_u64(&memcg->res, RES_LIMIT) >> 10,
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