From: Brian Foster Date: Tue, 6 Nov 2012 14:50:38 +0000 (-0500) Subject: xfs: add EOFBLOCKS inode tagging/untagging X-Git-Tag: omap-for-v3.8/fixes-for-merge-window-v4-signed~55^2~51 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=27b52867925e3aaed090063c1c58a7537e6373f3;p=pandora-kernel.git xfs: add EOFBLOCKS inode tagging/untagging Add the XFS_ICI_EOFBLOCKS_TAG inode tag to identify inodes with speculatively preallocated blocks beyond EOF. An inode is tagged when speculative preallocation occurs and untagged either via truncate down or when post-EOF blocks are freed via release or reclaim. The tag management is intentionally not aggressive to prefer simplicity over the complexity of handling all the corner cases under which post-EOF blocks could be freed (i.e., forward truncation, fallocate, write error conditions, etc.). This means that a tagged inode may or may not have post-EOF blocks after a period of time. The tag is eventually cleared when the inode is released or reclaimed. Signed-off-by: Brian Foster Reviewed-by: Dave Chinner Reviewed-by: Mark Tinguely Signed-off-by: Ben Myers --- Reading git-diff-tree failed