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    SubjectRe: [BUG] DVD writing in 2.6.6-rc2
    On Wed, Apr 28 2004, Moritz Muehlenhoff wrote:
    > Jens Axboe wrote:
    > >> I have a problem when using growisofs version 5.19.
    > >>
    > >> The problem is that in the very end when gowisofs tries to flush the
    > >> cache. When stracing the process I can see it sits in a call to poll
    > >> that never returns.
    > >
    > > I noted the same thing yesterday with cdrdao, so yours is not an
    > > isolated incident. I'll debug it tomorrow.
    >
    > I can confirm this bug for kernel 2.6.3-rc4 as well, so it's not too recent.
    > I found the following on my console after quitting k3b ungracefully, maybe

    This is really strange, I haven't been able to locate a kernel problem.
    Looking at command traces, cdrdao issues two FLUSH_CACHE commands when
    ending the writes. The last commands are:

    0x2a (last real write)
    0x35 (first flush cache) (takes about 10 seconds to complete)
    0x00 (test unit ready)
    0x51 (read disc info, length 4)
    0x35 (2nd flush cache) -> never completes

    That last sync cache never generates an interrupt, so cdrdao gets stuck
    forever waiting on it. I cannot even reproduce this with a test case

    --
    Jens Axboe

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