On Tue, Apr 19, 2016 at 03:19:59PM +0800, zhong jiang wrote: > cgroup writeback support the filesystem both ext4 and ext2. > but, it appears to be not work when I test the function in the ext4. > The example is as follows: > echo "8:0 1048576" > blkio.throttle.write_bps_device > echo $$ > cgroup.procs > dd if=/dev/zero of=/test.c bs=1M count=10240 > 10240+0 records in > 10240+0 records out > 10737418240 bytes (11 GB) copied, 49.8796 s, 215 MB/s
How much memory does the cgroup have available to it? It's buffered write. It might not get throttled if there are enough pages to dirty. Thanks. -- tejun
