Bug#715494: apt-pkg: out-of-date pkgcache.bin: /var/lib/dpkg/status updated more than once in one second
Package: apt
Version: 0.8.10
Severity: normal
Dear Maintainer,
we (Univention GmbH) provide a Debian based distribution called "UCS".
During automatic testing we noticed a suitable bug in APT:
If /var/lib/dpkg/status is updated more than once in one second, apt-pkg
does not detect that and does not update its /var/cache/apt/pkgcache.bin
file.
"dpkg-query -W" and "apt-cache policy" then display different versions
for the currently installed version.
I tracked it down to apt-pkg/pkgcache.cc and apt-pkg/deb/debindexfile.cc
only using 'stat.mtime' without the nano-second resolution in 'tv_nsec',
which more modern Linux kernels do provide.
Would you accept a patch which adds (conditional) support for that, or
do you prefer a different solution.
The bug is more likely to happen on fast machines and in virtual
machines, where the expensive disk sync get filtered out.
The full bug information is available in our public Bugzilla at
<https://forge.univention.org/bugzilla/show_bug.cgi?id=31773>
Sincerely
Philipp Hahn <pmhahn@debian.org>
-- Package-specific info:
-- System Information:
Debian Release: 7.1
APT prefers stable
APT policy: (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 3.2.0-4-amd64 (SMP w/2 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages apt depends on:
ii debian-archive-keyring 2012.4
ii gnupg 1.4.12-7
ii libapt-pkg4.12 0.9.7.9
ii libc6 2.13-38
ii libgcc1 1:4.7.2-5
ii libstdc++6 4.7.2-5
apt recommends no packages.
Versions of packages apt suggests:
pn apt-doc <none>
ii aptitude 0.6.8.2-1
ii dpkg-dev 1.16.10
ii python-apt 0.8.8.2
ii xz-utils 5.1.1alpha+20120614-2
-- no debconf information
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