tree: git://git.cmpxchg.org/linux-mmotm.git master
head: bb46fa8ad844d29e9f74f6209777d955a42916f6
commit: dbc3484b1953f019f408b7c1ecaa3f5e0e8c24bb [155/499] memcg: keep all children of each root cache on a list
mm/memcontrol.c:2946 memcg_update_cache_size() error: we previously assumed 'cur_params' could be null (see line 2932)
git remote add mmotm git://git.cmpxchg.org/linux-mmotm.git
git remote update mmotm
git checkout dbc3484b1953f019f408b7c1ecaa3f5e0e8c24bb
vim +/cur_params +2946 mm/memcontrol.c
f8570263 Vladimir Davydov 2014-01-23 2926 new_params = kzalloc(size, GFP_KERNEL);
f8570263 Vladimir Davydov 2014-01-23 2927 if (!new_params)
55007d84 Glauber Costa 2012-12-18 2928 return -ENOMEM;
55007d84 Glauber Costa 2012-12-18 2929
f8570263 Vladimir Davydov 2014-01-23 2930 new_params->is_root_cache = true;
dbc3484b Vladimir Davydov 2014-07-22 2931 INIT_LIST_HEAD(&new_params->children);
dbc3484b Vladimir Davydov 2014-07-22 @2932 if (cur_params)
dbc3484b Vladimir Davydov 2014-07-22 2933 list_replace(&cur_params->children,
dbc3484b Vladimir Davydov 2014-07-22 2934 &new_params->children);
55007d84 Glauber Costa 2012-12-18 2935
55007d84 Glauber Costa 2012-12-18 2936 /*
55007d84 Glauber Costa 2012-12-18 2937 * There is the chance it will be bigger than
55007d84 Glauber Costa 2012-12-18 2938 * memcg_limited_groups_array_size, if we failed an allocation
55007d84 Glauber Costa 2012-12-18 2939 * in a cache, in which case all caches updated before it, will
55007d84 Glauber Costa 2012-12-18 2940 * have a bigger array.
55007d84 Glauber Costa 2012-12-18 2941 *
55007d84 Glauber Costa 2012-12-18 2942 * But if that is the case, the data after
55007d84 Glauber Costa 2012-12-18 2943 * memcg_limited_groups_array_size is certainly unused
55007d84 Glauber Costa 2012-12-18 2944 */
55007d84 Glauber Costa 2012-12-18 2945 for (i = 0; i < memcg_limited_groups_array_size; i++) {
55007d84 Glauber Costa 2012-12-18 @2946 if (!cur_params->memcg_caches[i])
55007d84 Glauber Costa 2012-12-18 2947 continue;
f8570263 Vladimir Davydov 2014-01-23 2948 new_params->memcg_caches[i] =
55007d84 Glauber Costa 2012-12-18 2949 cur_params->memcg_caches[i];
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