diff options
| author | Shaun Ruffell <sruffell@digium.com> | 2010-09-24 22:45:07 +0000 |
|---|---|---|
| committer | Shaun Ruffell <sruffell@digium.com> | 2010-09-24 22:45:07 +0000 |
| commit | 34591052d9fa5f59af504b24a2ffcf97fce223d3 (patch) | |
| tree | 3d0c545abb997827cce4040855c7df277c92bb34 /drivers/dahdi/pciradio.rbt | |
| parent | 4bfa83e22e4a0e445fe68465073df34c00481183 (diff) | |
dahdi: Remove bigzaplock by converting chan_lock to spinlock_t.
The bigzaplock was used to prevent changes to all the channels during
masterspan processing while conference parameters were changing. The
master span processing also took a global lock out on the chan_lock to
prevent new channels from being registered or unregistered during
processing. Instead of grabbing both those locks, just changing the
semantics of chan_lock to those of bigzaplock seems to fit the bill and
removes another lock from the driver (and saves ~10 ns on a 2.40 GHz
Xeon in prcocess_masterspan)
chan_lock is a candidate for conversion to RCU but usage in conferencing
(bigzaplock type usage) needs to be audited carefully before conversion.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
Acked-by: Russ Meyerriecks <rmeyerriecks@digium.com>
Acked-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
Review: https://reviewboard.asterisk.org/r/940/
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9414 a0bf4364-ded3-4de4-8d8a-66a801d63aff
Diffstat (limited to 'drivers/dahdi/pciradio.rbt')
0 files changed, 0 insertions, 0 deletions