Andrea Righi wrote: > Together with cgroup_io_throttle() the kiothrottled kernel thread > represents the core of the io-throttle subsystem. > > All the writeback IO requests that need to be throttled are not > dispatched immediately in submit_bio(). Instead, they are added into an > rbtree by iothrottle_make_request() and processed asynchronously by > kiothrottled. > > A deadline is associated to each request depending on the bandwidth > usage of the cgroup it belongs. When a request is inserted into the > rbtree kiothrottled is awakened. This thread selects all the requests > with an expired deadline and submit the bunch of selected requests to > the underlying block devices using generic_make_request(). Hi Andrea, What if an user issues "sync", will the bios still be buffered in the rb-tree? Do we need to flush the whole tree? -- Regards Gui Jianfeng _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/containers
