git: dsched_fq - Refactor fqp allocation/destruction
commit edd247d31a4c3de0b873a975b4cb8230f858031f
Author: Alex Hornung <ahornung@gmail.com>
Date: Tue Apr 13 07:15:10 2010 +0000
dsched_fq - Refactor fqp allocation/destruction
* Accept another argument for fqp allocation which is the corresponding
fqmp. This is internally stored for proper self-removal out of the
fqmp list on destruction.
* This parameter is also used to link the fqp into the fqmp list
automatically on creation, avoiding code duplication and deadlocking.
* Changed the destruction refcount to -0x400 instead of -3 to make
tracking of these cases simpler and not confuse them with bad
refcounting.
* NOTE: this also fixes the longstanding issue of an eventual panic
after a number of policy switches to/from fq.
Reported-by: Antonio Huete (tuxillo@)
Summary of changes:
sys/dsched/fq/dsched_fq.h | 2 +-
sys/dsched/fq/dsched_fq_core.c | 40 +++++++++++++++++++-----------------
sys/dsched/fq/dsched_fq_diskops.c | 8 +-----
3 files changed, 24 insertions(+), 26 deletions(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/edd247d31a4c3de0b873a975b4cb8230f858031f
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