> I spent a bunch of time hammering on different ways to fix this without
> increasing nr_requests, and it was a mixture of needing better tuning in
> btrfs and needing to init mapping->writeback_index on inode allocation.
>
> So, today's numbers for creating 30 kernel trees in sequence:
>
> Btrfs defaults 57.41 MB/s
> Btrfs dup no csum 74.59 MB/s
> Btrfs no duplication 76.83 MB/s
> Btrfs no dup no csum no inline 76.85 MB/s
What sort of script are you using? Basically something like this?
for i in `seq 1 30` do
mkdir $i; cd $i
tar xjf /usr/src/linux-2.6.28.tar.bz2
cd ..
done
- Ted
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