On Wed, Sep 23, 2015 at 03:08:23PM -0700, Jaegeuk Kim <jaeg...@kernel.org>
wrote:
> > root@shag:/sys/fs/f2fs/dm-1# df -H /mnt
> > Filesystem Size Used Avail Use% Mounted on
> > /dev/mapper/vg_test-test 138G 137G 803k 100% /mnt
>
> Could you please share /sys/kernel/debug/f2fs/status?
Uh, sorry, I planned to, but forgot, probably because I thought the result
was so good it didn't need any checking :)
> So, I'm convinced that your inital test set "-o1 -s128", which was an unlucky
> trial. :)
hmm... since the point is to simulate a full 8TB partition, having large
overprovision/reserved space AND large section size might actually have been
a good test, as it would simulate the TB case better, which would also have
larger overprovisioning and the larger section size.
In the end, I might settle with -s64, and currently do tests with -s90.
I was just scared that overprovisioning might turn out ot be extremely large
with 8TB.
I have since then dropped -o from all my mkfs.f2fs invocations, seeing
that the resulting filesystem does not actually have 5% overprovisioning.
> Subject: [PATCH] mkfs.f2fs: fix wrong ovp space calculation on large section
Hmm, the latest change in
git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs-tools.git is from
august 10 - do I need to select a branch (I am not good with git)?
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