From: Wu Fengguang Date: Wed, 1 Dec 2010 23:33:37 +0000 (-0600) Subject: writeback: trace event writeback_single_inode X-Git-Tag: v3.1-rc1~228^2~13 X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=251d6a471c831e22880b3c146bb4556ddfb1dc82;p=pandora-kernel.git writeback: trace event writeback_single_inode It is valuable to know how the dirty inodes are iterated and their IO size. "writeback_single_inode: bdi 8:0: ino=134246746 state=I_DIRTY_SYNC|I_SYNC age=414 index=0 to_write=1024 wrote=0" - "state" reflects inode->i_state at the end of writeback_single_inode() - "index" reflects mapping->writeback_index after the ->writepages() call - "to_write" is the wbc->nr_to_write at entrance of writeback_single_inode() - "wrote" is the number of pages actually written v2: add trace event writeback_single_inode_requeue as proposed by Dave. CC: Dave Chinner Signed-off-by: Wu Fengguang --- Reading git-diff-tree failed