On 2010-02-22, at 16:05, Jan Kara wrote:
Hmm, and apparently there is some subtlety in the loopback device code because even when I use sync(1), the first and second images sometimes differ (although it's much rarer). But I see a commit block of the transaction already in the first image (the commit block is written last) but the contents of the transaction is present only in the second image.
It has never been safe to run ext3 on top of a loop device, because the loop device does not preserve ordering, and I'm not sure whether it properly passes barriers either.
Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc. -- 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
