The journal_checksum option is not being displayed in /proc/mounts ... add this to the show_options() output, but only if journal_async_commit is not specified, as that enables journal_checksum internally. Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx> --- (Aside: this reminds me that we only show non-default options in show_options; has there been any discussion of whether these should be defaults?) Index: linux-2.6/fs/ext4/super.c =================================================================== --- linux-2.6.orig/fs/ext4/super.c 2008-09-14 16:12:54.898077064 -0500 +++ linux-2.6/fs/ext4/super.c 2008-09-14 16:13:22.878077407 -0500 @@ -746,8 +746,12 @@ static int ext4_show_options(struct seq_ */ seq_puts(seq, ",barrier="); seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); + /* journal_async_commit enables journal_checksum internally */ if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) seq_puts(seq, ",journal_async_commit"); + else if (test_opt(sb, JOURNAL_CHECKSUM)) + seq_puts(seq, ",journal_checksum"); + if (test_opt(sb, NOBH)) seq_puts(seq, ",nobh"); if (!test_opt(sb, EXTENTS)) -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html