http://bugzilla.kernel.org/show_bug.cgi?id=14354 --- Comment #35 from Alasdair G Kergon <agk@xxxxxxxxxx> 2009-10-13 15:12:04 --- We used to issue EOPNOTSUPP in response to barriers (so flushing ceased to be supported when it became barrier-based). 'Basic' barrier support was added first (2.6.30-rc2), as Mike says, by waiting for relevant I/O to complete. Then this was extended (2.6.31-rc1) to send barriers to the underlying devices for most dm types of dm targets. To see which dm targets in a particular source tree forward barriers run: grep 'ti->num_flush_requests =' drivers/md/dm*c (set to a non-zero value). -- Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- 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
