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05 April 2024, 19:05:47 UTC
Revision bda8efec5c706a672e0714d341a342e811f0262a authored by Mikulas Patocka on 29 May 2011, 12:03:09 UTC, committed by Alasdair G Kergon on 29 May 2011, 12:03:09 UTC 
dm io: use fixed initial mempool size
 
Replace the arbitrary calculation of an initial io struct mempool size
with a constant.

The code calculated the number of reserved structures based on the request
size and used a "magic" multiplication constant of 4.  This patch changes
it to reserve a fixed number - itself still chosen quite arbitrarily.
Further testing might show if there is a better number to choose.

Note that if there is no memory pressure, we can still allocate an
arbitrary number of "struct io" structures.  One structure is enough to
process the whole request.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
1 parent d047145
History
Tip revision: bda8efec5c706a672e0714d341a342e811f0262a authored by Mikulas Patocka on 29 May 2011, 12:03:09 UTC
dm io: use fixed initial mempool size
Tip revision: bda8efe
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