Re: 5.2.1-RC hangs occasionally when sound files are played using the pcm driver

From: Brian O'Shea (b_oshea_at_yahoo.com)
Date: 02/24/04

  • Next message: Don Lewis: "Re: 5.2.1-RC hangs occasionally when sound files are played using the pcm driver" 
    Date: Mon, 23 Feb 2004 18:55:37 -0800 (PST)
To: Brian O'Shea <b_oshea@yahoo.com>, Mathew Kanner <mat@cnd.mcgill.ca>

    --- Brian O'Shea <b_oshea@yahoo.com> wrote:
    > --- Mathew Kanner <mat@cnd.mcgill.ca> wrote:
    > >
    > > Hello Brian,
    > > Don Lewis commited changes to the 5.2- tree on 2/14. Could
    > > you update and try again, also please do run with witness and
    > > invariants, and if possible try to get a crashdump so we can see
    > > what's happening.
    >
    > Sure. I'll try to reproduce it with witness and invariants first, just
    > to avoid changing too many conditions at the same time. Failing that,
    > I'll update to the latest 5.2 tree and see if the problem goes away.

    makeoptions DEBUG=-g #Build kernel with gdb(1) debug symbols
    options INVARIANTS #Enable calls of extra sanity checking
    options INVARIANT_SUPPORT #Extra sanity checks of internal
    structures, required by INVARIANTS
    options WITNESS #Enable checks to detect deadlocks and
    cycles
    #options WITNESS_SKIPSPIN #Don't run witness on spinlocks for
    speed

    Ok, the problem seems to happen much more reliably now, but still no
    panic (so no crash dump). However, I did notice that for some reason
    I had built an SMP kernel. All kernels that I have seen exhibit this pcm
    driver hang were apparently SMP kernels...I guess that's the default
    in GENERIC, which I copied and adapted for my kernel config. As my system
    only has one CPU, I will build a UP kernel and see if that has any
    effect.

    Thanks,
    -brian

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  • Next message: Don Lewis: "Re: 5.2.1-RC hangs occasionally when sound files are played using the pcm driver"

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