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Re: Bug#588339: sync/fsync in dpkg



On 2010-10-21 19:14 +0200, Jonathan Nieder wrote:

> Ken Bloom wrote:
>
>> And what mount options are you using? If you're using
>> defaults, /etc/mtab (and therefore the mount command) won't know what
>> the default values are, but you can check /proc/mounts which will
>> include the data= mount option.
>
> data=ordered.  That's the default for ext4.

Yes, and data=writeback does not make much of a difference.  However,
using the "nodelalloc" mount option does wonders, increasing unpacking
speed in dpkg 1.15.7 by a factor of ~8.

Sven



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