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Replace FILEDESC_[UN]LOCK_FAST() with a critical section on UP.

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Gives a small but measurable performance improvement.

Submitted by:	Divacky Roman <xdivac02@stud.fit.vutbr.cz>
MFC after:	1 month
This commit is contained in:
Suleiman Souhlal 2006-04-06 16:27:48 +00:00
parent 5ec7256cb1
commit 90e72822ac
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=157565
1 changed files with 5 additions and 1 deletions
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6
sys/sys/filedesc.h
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@ -118,6 +118,7 @@ struct filedesc_to_leader {
mtx_unlock(&(fd)->fd_mtx); \
} while (0)
#ifdef SMP
#define FILEDESC_LOCK_FAST(fd) \
do { \
mtx_lock(&(fd)->fd_mtx); \
@ -137,7 +138,10 @@ struct filedesc_to_leader {
wakeup(&(fd)->fd_locked); \
mtx_unlock(&(fd)->fd_mtx); \
} while (0)
#else
#define FILEDESC_LOCK_FAST(fdp) critical_enter()
#define FILEDESC_UNLOCK_FAST(fdp) critical_exit()
#endif /* SMP */
#ifdef INVARIANT_SUPPORT
#define FILEDESC_LOCK_ASSERT(fd, arg) \
do { \