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    SubjectRe: [2.4.17/18pre] VM and swap - it's really unusable
    On Sat, Jan 12, 2002 at 06:48:28PM +0100, Roman Zippel wrote:
    > Hi,
    >
    > yodaiken@fsmlabs.com wrote:
    >
    > > No. The point of using semaphores is that one can sleep while
    > > _waiting_ for the resource.
    > > [...]
    > > In a preemptive kernel this can cause a deadlock. In a non
    > > preemptive it cannot. You are correct in that
    > > B:
    > > get sem on memory pool
    > > do potentially blocking operations
    > > release sem
    > > is also dangerous - but I don't think that helps your case.
    > > To fix B, we can enforce a coding rule - one of the reasons why
    > > we have all those atomic ops in the kernel is to be able to
    > > avoid this problem.
    >
    > Sorry I can't follow you. First, one can sleep while waiting for the

    We're having a write only discussion - time to stop.

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