[Bug 657209] Re: CPU usage spike when apt-get writes to an SSD formattted in btrfs

[shawnlandden]

dpkg (apt's backend) does alot of fsync() calls


does this still happen with precise and a 12.04 kernel?

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https://bugs.launchpad.net/bugs/657209

Title:
  CPU usage spike when apt-get writes to an SSD formattted in btrfs

Status in “btrfs-tools” package in Ubuntu:
  New

Bug description:
  Binary package hint: btrfs-tools

  On a netbook's SSD formatted in btrfs (with a separate /boot partition
  of course), whenever I run apt-get in a terminal or Software
  Center/Synaptic in a GUI, the CPU usage spikes to near-100% (it's an
  Intel Atom). I have absolutely no idea what's causing this CPU spike,
  but I definitely think it's a bug within btrfs itself.

  ProblemType: Bug
  DistroRelease: Ubuntu 10.10
  Package: btrfs-tools 0.19+20100601-3
  ProcVersionSignature: Ubuntu 2.6.35-22.33-generic 2.6.35.4
  Uname: Linux 2.6.35-22-generic i686
  Architecture: i386
  Date: Fri Oct  8 23:46:09 2010
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release Candidate i386 (20101002)
  ProcEnviron:
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: btrfs-tools

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