Date: Thu, 31 Jul 2003 11:50:58 -0700 (PDT) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern subr_witness.c src/sys/sys lock.h Message-ID: <200307311850.h6VIow8g091646@repoman.freebsd.org>
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jhb 2003/07/31 11:50:58 PDT
FreeBSD src repository
Modified files:
sys/kern subr_witness.c
sys/sys lock.h
Log:
Add a new function to look for a spinlock's instance when it is held by
another thread. We use the td_oncpu member of the other field to locate
it's associated CPU and then search the that CPU's list of spin locks
contained in its per-CPU data. This is not always safe and may in fact
panic or just not work, but it is useful in at least one case.
Revision Changes Path
1.157 +21 -0 src/sys/kern/subr_witness.c
1.48 +1 -0 src/sys/sys/lock.h
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