Bug#669006: ata_piix poor performance on ich5
: : Teemu Järvinen wrote:
: : > At first I noticed that NFS performance is low when tried to access this
: : > server, and any serious reading attempt leads nfsd consuming all the
: : > available cpu time. Later it became obvious that the local filesystem
: : > is to blame, it behaves like there is no DMA.
The problem solved, faulty hd eventually revealed itself by
generating enough i/o-errors.
: [ 1.756838] ata2.00: ATA-8: WDC WD5000AACS-00G8B1, 05.04C05, max UDMA/133
After replacing this disc, the speed issues are history.
The cpu burning is related to NFSv4, after reconfigured to use NFSv3
my file server is working smoothly.
--
Teemu
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