On Thu, Nov 13, 2008 at 02:46:28PM -0500, Theodore Tso wrote: > I'm assuming that ext3 filesystem was created with htree enabled > (possibly not true on older versions of e2fsprogs), but if you're > creating ext4 filesystems, I'm assuming that you have been using an > 1.41.x version of e2fsprogs. All filesystems are new filesystems, created with e2fsprogs 1.41.2, all with the default options except for ^huge_file and the inode size. > If this the the case, the most likely explanation is that that ext4 > defaults to barriers enabled, and ext3 defaults to barriers disabled. > So try mounting ext3 with "-o barriers=1", or ext4 with "-o > barriers=0", so that the comparison is between apples and apples. The indication from dmesg is that ext4 is already running with barriers disabled due to running over dm, but I will re-run with barriers forced off to double check. -- Bruce Guenter <bruce@xxxxxxxxxxxxxx> http://untroubled.org/
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