Date: Sun, 17 Nov 2002 03:47:03 -0800 (PST) From: David Xu <davidxu@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern kern_thread.c Message-ID: <200211171147.gAHBl3i8068723@repoman.freebsd.org>
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davidxu 2002/11/17 03:47:03 PST
Modified files:
sys/kern kern_thread.c
Log:
1.Add sysctls to control KSE resource allocation.
kern.threads.max_threads_per_proc
kern.threads.max_groups_per_proc
2.Temporary disable borrower thread stash itself as
owner thread's spare thread in thread_exit(). there
is a race between owner thread and borrow thread:
an owner thread may allocate a spare thread as this:
if (td->td_standin == NULL)
td->standin = thread_alloc();
but thread_alloc() can block the thread, then a borrower
thread would possible stash it self as owner's spare
thread in thread_exit(), after owner is resumed, result
is a thread leak in kernel, double check in owner can
avoid the race, but it may be ugly and not worth to do.
Revision Changes Path
1.61 +30 -8 src/sys/kern/kern_thread.c
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