[nfs people purged from Cc] On 27 Oct 2012, Theodore Ts'o verbalised:
> Huh? It's not turned on by default. If you mount with no mount > options, journal checksums are *not* turned on. ?! it's turned on for me, and though I use weird mount options I don't use that one: /dev/main/var /var ext4 defaults,nobarrier,usrquota,grpquota,nosuid,nodev,relatime,journal_async_commit,commit=30,user_xattr,acl 1 2 Default mount options: (none) /dev/mapper/main-var /var ext4 rw,nosuid,nodev,relatime,journal_checksum,journal_async_commit,nobarrier,quota,usrquota,grpquota,commit=30,stripe=16,data=ordered,usrquota,grpquota 0 0 ... Ah! it's turned on by journal_async_commit. OK, that alone argues against use of journal_async_commit, tested or not, and I'd not have turned it on if I'd noticed that. (So, the combinations I'll be trying for effect on this bug are: journal_async_commit (as now) journal_checksum none Technically to investigate all possibilities we should try journal_async_commit,no_journal_checksum, but this seems so unlikely to have ever been tested by anyone that it's not worth looking into...) -- NULL && (void) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
