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SubjectRe: EXT3 - freeze ups during disk writes
Date
A Diumenge 02 Desembre 2001 19:15, Mark Hahn va escriure:
> in other mail I asked Erik about the disk's mode: it is PIO,
> so the pathetic speed and crippling VM/Ext2 performance is
> entirely expected. I'm guessing he's missing CONFIGs of either
> the chipset-specific driver or one of:
> CONFIG_BLK_DEV_IDEDMA_PCI=y
> CONFIG_BLK_DEV_ADMA=y
> CONFIG_IDEDMA_PCI_AUTO=y
> CONFIG_BLK_DEV_IDEDMA=y
> CONFIG_IDEDMA_AUTO=y
>
> > > I've seen a couple of reports where ext3 appears to exacerbate
> > > the effects of poor hdparm settings. What is your raw disk
> > > throughput, from `hdparm -t /dev/hda'?
> >
> > `hdparm -t /dev/hda` reports:
> >
> > # hdparm -t /dev/hda
> >
> > /dev/hda:
> > Timing buffered disk reads: 64 MB in 16.76 seconds = 3.82 MB/sec

maybe the only thing he is missing is the *AUTO configs

you could try:
# /sbin/hdparm -c 1 -d 1 /dev/hda
which tries to do this:
/dev/hda:
setting 32-bit I/O support flag to 1
setting using_dma to 1 (on)

and then test again with -t to see if it gets better...
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