On 16.09.20 04:53, zangchunxin@xxxxxxxxxxxxx wrote: > From: Chunxin Zang <zangchunxin@xxxxxxxxxxxxx> > > On our server, there are about 10k memcg in one machine. They use memory > very frequently. We have observed that drop_caches can take a > considerable amount of time, and can't stop it. > > There are two reasons: > 1. There is somebody constantly generating more objects to reclaim > on drop_caches, result the 'freed' always bigger than 10. > 2. The process has no chance to process signals. > > We can get the following info through 'ps': > > root:~# ps -aux | grep drop > root 357956 ... R Aug25 21119854:55 echo 3 > /proc/sys/vm/drop_caches > root 1771385 ... R Aug16 21146421:17 echo 3 > /proc/sys/vm/drop_caches > > Add a bail out on the fatal signals in the main loop so that the > operation can be terminated by userspace. > > Signed-off-by: Chunxin Zang <zangchunxin@xxxxxxxxxxxxx> > Signed-off-by: Muchun Song <songmuchun@xxxxxxxxxxxxx> ^ he did not actually send that, no? Maybe co-developed-by ? -- Thanks, David / dhildenb
