Messages in this thread | | | Date | Wed, 28 Apr 2004 13:30:56 +0200 | From | Jens Axboe <> | Subject | Re: [BUG] DVD writing in 2.6.6-rc2 |
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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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