From: Michael R. <ra...@st...> - 2004-03-21 06:13:38
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I'm running UML Version 2.6.4-1um with a 2.6.4 skas3 host. I'm using Debian Unstable and I've mved /lib/tls to /lib/notls to disable the NPTL problem... When running Bind, version 9.2.3 one of the Bind threads decides it want all the CPU time... When I strace the process it is performing the following system call indefinetly... kill(5960, SIGRTMIN) = 0 Where '5960' is the PID of the process which is using all CPU time. From what I've been able to figure out... SIGRTMIN is one of the real-time linux threading signals... Something implemented in libc6, version 2.3? Would I be better of compiling libc6 from source with NPTL/TLS disabled? Would it resolve this problem? Or is it a matter of this syscall not being implemented in UML? Michael Ralston Stral.net |
From: Jeff D. <jd...@ad...> - 2004-03-22 20:39:54
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ra...@st... said: > Would I be better of compiling libc6 from source with NPTL/TLS > disabled? Would it resolve this problem? Or is it a matter of this > syscall not being implemented in UML? Kill is definitely implemented in UML. This looks like a pthreads thing, but I don't know what, given you've moved /lib/tls. Jeff |
From: BlaisorBlade <bla...@ya...> - 2004-03-23 02:59:01
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Alle 07:12, domenica 21 marzo 2004, Michael Ralston ha scritto: > I'm running UML Version 2.6.4-1um with a 2.6.4 skas3 host. > > I'm using Debian Unstable and I've mved /lib/tls to /lib/notls to > disable the NPTL problem... > > When running Bind, version 9.2.3 one of the Bind threads decides it want > all the CPU time... When I strace the process it is performing the > following system call indefinetly... Have you checked if bind 9.2.3 is stable (no idea)? Could you give detail on its config (i.e. it is configured to use special things as shared memory or even futexes, which require NPTL)... > kill(5960, SIGRTMIN) = 0 > > Where '5960' is the PID of the process which is using all CPU time. Do strace -f (IIRC) to follow the child processes it start and see what pid 5960 is doing in the meanwhile. Also look Bind's logs and errors. But does it lock the Virtual Machine and prevent you from doing anything or it just runs continuately? I think it just keeps running. > From what I've been able to figure out... SIGRTMIN is one of the > real-time linux threading signals... Something implemented in libc6, > version 2.3? Yes, at all! SIGRTMIN is a way of saying something to the process - the meaning is decided by the programmer and not by the system (i.e. for the kernel SIGRTMIN has no special meaning, unlike SIGINT, SIGKILL and so on). > Would I be better of compiling libc6 from source with NPTL/TLS disabled? > Would it resolve this problem? No idea, however check if bind is linked statically (and in this case it could be still trying to use NPTL, *maybe*). > Or is it a matter of this syscall not > being implemented in UML? Well, kill() *is* implemented. By sure. -- Paolo Giarrusso, aka Blaisorblade Linux registered user n. 292729 |