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    SubjectRe: [PATCH] multithreaded coredumps for elf exeecutables
    On Thu, Mar 21, 2002 at 03:46:50PM +0530, Vamsi Krishna S . wrote:
    > Dan,
    > Thanks for pointing this out. I see that this change has now gone into
    > 2.4.18 as well as 2.5.4. We would ensure that the down_write happens
    > only after the registers of all threads are collected.

    Yes, your other patch for this looks OK.

    > Coming back to the original point raised by Pavel, indeed there is
    > nothing preventing external code (any other kernel modules) modifying
    > the cpus_allowed field from under us. This could get worse in 2.5.x
    > where a user could change cpu affinity (through proc or a syscall,
    > though I don't think the patches providing this are accepted as yet).

    We really need a non-signal-based way to tell the scheduler that a task
    can not be scheduled. A lot of the machinery is all there, but private to
    sched.c; the rest is pretty straightforward.

    Daniel Jacobowitz Carnegie Mellon University
    MontaVista Software Debian GNU/Linux Developer
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