From: Chris Mason <mason@xxxxxxxx> Subject: make ext3 mount default to barrier=1 This patch turns on barriers by default for ext3. mount -o barrier=0 will turn them off. It also changes the ext3 fsync call to trigger a barrier when a commit isn't done. Signed-off-by: Chris Mason <mason@xxxxxxxx> --- a/fs/ext3/fsync.c Mon Feb 6 14:42:44 2006 -0500 +++ b/fs/ext3/fsync.c Mon Feb 6 14:43:14 2006 -0500 @@ -27,6 +27,7 @@ #include <linux/sched.h> #include <linux/writeback.h> #include <linux/jbd.h> +#include <linux/blkdev.h> #include <linux/ext3_fs.h> #include <linux/ext3_jbd.h> @@ -81,7 +82,10 @@ int ext3_sync_file(struct file * file, s .sync_mode = WB_SYNC_ALL, .nr_to_write = 0, /* sys_fsync did this */ }; + journal_t *journal = EXT3_SB(inode->i_sb)->s_journal; ret = sync_inode(inode, &wbc); + if (journal && (journal->j_flags & JFS_BARRIER)) + blkdev_issue_flush(inode->i_sb->s_bdev, NULL); } out: return ret; diff -r b1d8075ee99b fs/ext3/super.c --- a/fs/ext3/super.c Mon Feb 6 14:42:44 2006 -0500 +++ b/fs/ext3/super.c Mon Feb 6 14:43:14 2006 -0500 @@ -1423,6 +1423,8 @@ static int ext3_fill_super (struct super sbi->s_resuid = le16_to_cpu(es->s_def_resuid); sbi->s_resgid = le16_to_cpu(es->s_def_resgid); + /* enable barriers by default */ + set_opt(sbi->s_mount_opt, BARRIER); set_opt(sbi->s_mount_opt, RESERVATION); if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum, - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
