Chow Loong Jin wrote the following on 02.03.2011 18:51 > Hi, > > On Thursday 03,March,2011 12:02 AM, Marius Vollmer wrote: >> [...] >> - Instead, we move all packages that are to be unpacked into >> half-installed / reinstreq before touching the first one, and put a >> big sync() right before carefully writing /var/lib/dpkg/status. > > Could we somehow avoid using sync()? sync() syncs all mounted filesystems, > which > isn't exactly very friendly when you have a few slow-syncing filesystems like > btrfs (or even NFS) mounted. I recall my schroots that ran on tmpfs unpacking > exceptionally slowly due to this issue until I stuck libeatmydata (or a > variant > of it) onto the schroots' dpkgs. > > I actually recall there being some things mentioned about FS_IOC_SYNCFS (lkml > thread[1], dpkg-devel thread[2]) for faster per-filesystem syncing, but that > seems to have died of natural causes last year. > >> [...] > > > [1] http://thread.gmane.org/gmane.linux.file-systems/44628 > [2] http://lists.debian.org/debian-dpkg/2010/11/msg00069.html
Just for reference afaik there has been a discussion about this topic last year. If you are interested why dpkg does all those syncs read: http://thread.gmane.org/gmane.linux.debian.devel.bugs.general/770841 -- bye Thilo 4096R/0xC70B1A8F 721B 1BA0 095C 1ABA 3FC6 7C18 89A4 A2A0 C70B 1A8F -- To UNSUBSCRIBE, email to debian-devel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/ikm75b$s3t$1...@dough.gmane.org
