[PATCH] Race in pipe code

From: Christian Ehrhardt (ehrhardt@mathematik.uni-ulm.de)
Date: Sat Jul 15 2000 - 18:14:43 EDT

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    Hi,

    I can prove the race now (sample code attached) and I have a patch that fixes
    it for me. If noone sees problems with the patch I'll send it to Linus.
    The patch was developped for 2.3.99-pre9 but it applies cleanly against
    2.4.0-test4.

    The nice(20) in the test program isn't needed, it just helps to trigger the
    race. About 50% of the time the program prints BBBBBBBBBB on stderr and
    4000(!) A's on stdout which is clearly wrong. The patch basically makes
    sure that the same reader continues to read from the pipe after it went
    to sleep.

        regards Christian 

    -- 
THAT'S ALL FOLKS!

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