From mboxrd@z Thu Jan  1 00:00:00 1970
From: Edward Shishkin <edward.shishkin@gmail.com>
Subject: [patch 0/1] reiser4: iterate over extents in discard_atom
Date: Sun, 20 Jul 2014 14:47:32 +0200
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To: "reiserfs-devel@vger.kernel.org" <reiserfs-devel@vger.kernel.org>, Ivan Shapovalov <intelfx100@gmail.com>

In this version we support all erase units (not only ones, which are 
powers of 2).
I put a restriction 1MiB for erase units just to filter possible 
garbage. We can
increase this boundary, if needed.
Alignments with (bdev_discard_alignment() % s_blocksize != 0) are still 
unsupported.

I have added mount options to specify erase unit and alignment in bytes. 
This is
only for debugging purposes (to emulate real situations). Usage is the 
following:

mount /dev/xxx -o discard,discard.unit=yyy,discard.offset=zzz /mnt

Thanks,
Edward.