Ubuntu
dpkg package

  1. Bug #601299
  2. Comment #52

Comment 52 for bug 601299

Revision history for this message
Ketil Malde (ketil-ii) wrote : Re: [Maverick/Natty] btrfs is extremely slow

I think that in my case, this is caused by me using the 'discard' option. See e.g:

http://lists-archives.org/linux-kernel/27396958-btrfs-and-apt-package-manager-in-ubuntu-discard-stalls.html

I did the test suggested, and with discard enabled, it took about 45 seconds, without discard it took 12 seconds. Looks like there is some nasty interaction between fsync and discard? Anyway, this is likely a different issue from what others are reporting, so I'll open a new bug (as soon as I can find out &%¤##" how, the "Report a bug" link just points into a maze of long wiki pages, all alike...)