Bug#52041: marked as done (apt: Apt fails on SMP machines)
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and subject line Bug#52041: apt: Apt fails on SMP machines
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From: Hirling Endre <endre@dawn.elte.hu>
Subject: apt: Apt fails on SMP machines
To: submit@bugs.debian.org
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Date: Mon, 06 Dec 1999 15:03:27 +0100
Package: apt
Version: 0.3.10slink11
Severity: normal
Apt >=0.3.13 fails with "Bad file descriptor" on SMP machines. It
seems like a race condition somewhere because the problem
disappears if I try to trace it with strace or use it on a loaded
system. 0.3.10slink11 works OK. I don't have versions between the
two to test with.
I've tried this on a dual pIII-450 and a dual pII-333 system with
the same results.
-- System Information
Debian Release: potato
Kernel Version: Linux dawn 2.2.14pre8 #2 SMP Thu Nov 25 11:54:30 CET 1999 i686 unknown
Versions of the packages apt depends on:
ii libc6 2.1.2-10 GNU C Library: Shared libraries and timezone
ii libstdc++2.9 2.91.61-1 The GNU stdc++ library (egcs version)
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Date: Thu, 9 Dec 1999 15:38:30 -0700 (MST)
From: Jason Gunthorpe <jgg@ualberta.ca>
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Reply-To: Jason Gunthorpe <jgg@ualberta.ca>
To: Hirling Endre <endre@dawn.elte.hu>
cc: 52041-done@bugs.debian.org, APT Development Team <deity@lists.debian.org>
Subject: Re: Bug#52041: apt: Apt fails on SMP machines
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On Thu, 9 Dec 1999, Hirling Endre wrote:
> > http://pandora.debian.org/~jgg/apt_0.3.15.1_i386.deb
>
> I've tested it and now get error messages "Resource temporarily
> unavailable" at the same places. The debugging option didn't help
> either, it causes some debugging info to be printed out when all goes
> OK.
This is a kernel bug then. It means the following happened:
1) select on the FD returned data was available to be read
2) read on the FD returned EAGAIN (meaning data is not available)
The two situations are exclusive. I suggest you upgrade your kernel. Why
this worked with the slink version probably has to do with timing and/or
glibc.
Jason
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