Date: Wed, 19 Mar 2008 07:35:14 +0000 (UTC) From: Jeff Roberson <jeff@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern subr_sleepqueue.c Message-ID: <200803190735.m2J7ZEhO000502@repoman.freebsd.org>
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jeff 2008-03-19 07:35:14 UTC
FreeBSD src repository
Modified files:
sys/kern subr_sleepqueue.c
Log:
- At the top of sleepq_catch_signals() lock the thread and check TDF_NEEDSIGCHK
before doing the very expensive cursig() and related locking. NEEDSIGCHK
is updated whenever our signal mask change or when a signal is delivered and
should be sufficient to avoid the more expensive tests. This eliminates
another source of PROC_LOCK contention in multithreaded programs.
Revision Changes Path
1.50 +12 -4 src/sys/kern/subr_sleepqueue.c
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