Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On 06/11/2012 03:31 PM, Florian Haas wrote: > Try configuring your disk section with no-disk-barrier, > no-disk-flushes and no-md-flushes (in both configurations) and see if > your kernel module change still makes a difference. FWIW, we saw exactly this behavior on newer 3.2.x kernels as well. With XFS and our RAID controllers being capacitor-backed, we disabled barriers and flushes, and that brought performance back to expected levels. -- Shaun Thomas OptionsHouse | 141 W. Jackson Blvd. | Suite 500 | Chicago IL, 60604 312-444-8534 sthomas at optionshouse.com ______________________________________________ See http://www.peak6.com/email_disclaimer/ for terms and conditions related to this email