On Wed, Jul 10, 2013 at 05:14:49PM -0400, sheng qiu wrote: > Hi Kent, > > i am sorry to bother you again. i am reading the movinggc.c, i am > really interested in this piece of codes. So if i enable the copy_gc, > this piece of codes will be active. My question is after the gc_moving > confirmed the gc_moving_threshold, it began to scan the bkeys. i do > not quite understand how you fill the moving_gc_keys, do you go > through all the current btree nodes to find proper keys for migration > (the bucket.used_sectors < threshold)? or you do incremental scans?
Incremental scans - the keybuf code scans the btree until it has some arbitrary number of keys in a red black tree; the copy gc code pulls keys out of that one at a time to move them and the keybuf code refills itself by scanning incrementally as needed. -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
