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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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