Messages in this thread | | | Date | Thu, 26 Feb 2004 17:16:37 +0100 | From | Willy Tarreau <> | Subject | [BUG][2.4] /proc/kcore is a random generator ? |
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Hi all,
I'm encountering a rather strange behaviour here with 2.4.25 on a P4 HT, even when I boot it with "nosmp" : - du /proc/kcore says '525255' (I have 512 MB RAM) - if I do it again many several times, sometimes it says '0' - after a moment (or several tests, I don't know), it stabilizes to some value (either 0 or 525255). - then, just starting vmstat, or logging into the system is enough to make it switch to the other value.
At first, I had the feeling that it displayed '0' when I have an even number of processes, and 525255 when I have an odd number, but it's not even the case. Once it doesn't move by itself, a few fork/exec are enough to switch the value.
If I boot in HT mode, sometimes I can reliably make it display 0 and 525255 alternatively, just as if the pid parity or CPU number was involved in the result.
Update: same results with 2.4.26-pre1. du from coreutils 4.5.4 and 5.0.
This is amazing. Did anyone notice this ? A friend just told me that plain 2.4.22 on his notebook does the same !
Regards, Willy
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