Date: Thu, 6 Mar 2003 09:25:06 -0800 (PST) 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 Message-ID: <200303061725.h26HP66f033827@repoman.freebsd.org>
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jhb 2003/03/06 09:25:06 PST
FreeBSD src repository
Modified files:
sys/kern subr_witness.c
Log:
Oops, fix the double faults people were seeing with the recent changes to
witness. Sleepable locks such as sx locks always come before all mutexes
including Giant. However, the static lock order list placed Giant before
the proctree and allproc sx locks. This resulted in witness creating a
cycle in its lock order "tree" (real trees don't have cycles) leading to
infinite recursion and eventually a double fault. To fix, put Giant after
sx locks in the lock order list.
Revision Changes Path
1.141 +1 -1 src/sys/kern/subr_witness.c
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