Re: [PATCH v2] ext4: dynamical adjust the length of zero-out chunk

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> The previously rule of thumb which I had used was that after doing a
> random seek, the time needed to write 4k and 32k was pretty much in
> the noise.  But that was a number from several years ago.  I suppose I
> should do some quick experiments to see what is a good number these
> days....

Indeed.  fio to the rescue.

I remember Christoph saying something about 64k somewhat recently?  But,
helpfully, I can't recall the details :).

- z
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