Vivek Goyal wrote: > o So far we were assuming that a bio/rq belongs to the task who is submitting > it. It did not hold good in case of async writes. This patch makes use of > blkio_cgroup pataches to attribute the aysnc writes to right group instead > of task submitting the bio. > > o For sync requests, we continue to assume that io belongs to the task > submitting it. Only in case of async requests, we make use of io tracking > patches to track the owner cgroup. > > o So far cfq always caches the async queue pointer. With async requests now > not necessarily being tied to submitting task io context, caching the > pointer will not help for async queues. This patch introduces a new config > option CONFIG_TRACK_ASYNC_CONTEXT. If this option is not set, cfq retains > old behavior where async queue pointer is cached in task context. If it > is set, async queue pointer is not cached and we take help of bio > tracking patches to determine group bio belongs to and then map it to > async queue of that group. > > Signed-off-by: Nauman Rafique <nauman@xxxxxxxxxx> > Signed-off-by: Gui Jianfeng <guijianfeng@xxxxxxxxxxxxxx> > Signed-off-by: Vivek Goyal <vgoyal@xxxxxxxxxx> Acked-by: Rik van Riel <riel@xxxxxxxxxx> _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/containers
