From: Jan Kara Date: Fri, 15 Feb 2008 03:31:32 +0000 (-0800) Subject: vfs: add explanation of I_DIRTY_DATASYNC bit X-Git-Tag: v2.6.25-rc2~31 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=000cb48ee18165776b5a2beb72ed18f66bc61878;p=linux-2.6 vfs: add explanation of I_DIRTY_DATASYNC bit Add explanation of I_DIRTY_DATASYNC bit. Signed-off-by: Jan Kara Cc: Joern Engel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/include/linux/fs.h b/include/linux/fs.h index 18cfbf76ec..98ffb6ead4 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1284,8 +1284,10 @@ struct super_operations { * * I_DIRTY_SYNC Inode is dirty, but doesn't have to be written on * fdatasync(). i_atime is the usual cause. - * I_DIRTY_DATASYNC Inode is dirty and must be written on fdatasync(), f.e. - * because i_size changed. + * I_DIRTY_DATASYNC Data-related inode changes pending. We keep track of + * these changes separately from I_DIRTY_SYNC so that we + * don't have to write inode on fdatasync() when only + * mtime has changed in it. * I_DIRTY_PAGES Inode has dirty pages. Inode itself may be clean. * I_NEW get_new_inode() sets i_state to I_LOCK|I_NEW. Both * are cleared by unlock_new_inode(), called from iget().