Denice, First and foremost, thank you for the reply. I have included the I/O stack for your convenience.
nfs, xfs, lvm, megaraid_sas I could get rid of lvm layer, but the others are required. We're currently using this as our NAS. When the array was created, ext4 was not yet widely adopted so we chose to go with xfs. What value should I set for vm.min_free_kbytes? In further researching the issue, I have discovered that 2.6.35 includes "xfs: skip writeback from reclaim context." Should I entertain the idea of using a newer version of the kernel? Thank you -- Ryan C. England Corvid Technologies <http://www.corvidtec.com/> office: 704-799-6944 x158 cell: 980-521-2297
