Package: dpkg Version: 1.15.7.2 Severity: normal Hi,
the fsync()/sync() changes done recently cause significant performance loss of dpkg when used in chroot environments living on tmpfs. For short-lived chroots that cause a lot of e.g. dpkg activity (e.g. pbuilder environments while building, piuparts while testing, ...) I prefer to have them on tmpfs in order to reduce the amount of I/O which hits the disk - and get a significant speed boost that way. Unfortunately since the last dpkg changes concerning sync()/fsync() this no longer works out well - the continuous sync() from a "virtual" chroot on tmpfs hits the physical system really hard, causing speed loss factors between 3-5, probably more if multiple pbuilder builds/piuparts tests are run in parallel. Is there a possibility to disable the syncing when dpkg runs on tmpfs? Andreas -- System Information: Debian Release: squeeze/sid APT prefers stable APT policy: (800, 'stable'), (700, 'testing'), (600, 'unstable'), (130, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 2.6.32-5-amd64 (SMP w/2 CPU cores) Locale: LANG=en_US.utf8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Versions of packages dpkg depends on: ii coreutils 8.5-1 GNU core utilities ii libbz2-1.0 1.0.5-4 high-quality block-sorting file co ii libc6 2.11.2-2 Embedded GNU C Library: Shared lib ii libselinux1 2.0.94-1 SELinux runtime shared libraries ii xz-utils 4.999.9beta+20100527-1 XZ-format compression utilities ii zlib1g 1:1.2.3.4.dfsg-3 compression library - runtime dpkg recommends no packages. Versions of packages dpkg suggests: ii apt 0.7.25.3 Advanced front-end for dpkg -- no debconf information -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
