On 07/16/2014 01:24 PM, Ivan Shapovalov wrote:
This needs your version of discard algorithm, because blocks inside extents of
discard set are now marked as allocated.
OK, I'll try to finish it in weekends..
BTW, have you dropped the case with erase unit size < block size?
In my version all erase units are supported except ones which are
not a power of 2. We can support all erase units without exceptions,
if needed.
This is
probably OK, but configurations with nonzero alignments are then broken.
I support alignments with (bdev_discard_alignment % sb->s_blocksize == 0)
We can support all alignments without exceptions, but it will lead to
complications
in discard_sorted_extents().
Not
worth handling these, I think, but nevertheless a warning could be useful ;)
Agreed. It is important.
Thanks!
Edward.
Ivan Shapovalov (2):
reiser4: discard support: perform discards and deallocations after writing logs.
reiser4: discard support: proof-of-concept for "discard before dealloc".
fs/reiser4/block_alloc.c | 48 +++++++++++++++++++-------------------
fs/reiser4/discard.c | 60 ++++++++++++++++++++++++++++++++++--------------
fs/reiser4/discard.h | 4 +++-
fs/reiser4/txnmgr.c | 35 ----------------------------
fs/reiser4/txnmgr.h | 13 ++---------
fs/reiser4/wander.c | 3 ++-
6 files changed, 73 insertions(+), 90 deletions(-)
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