Date: Sat, 24 Jan 2015 16:59:38 +0000 (UTC) From: Ryan Stone <rstone@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r277649 - head/sys/vm Message-ID: <201501241659.t0OGxcxC071104@svn.freebsd.org>
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Author: rstone Date: Sat Jan 24 16:59:38 2015 New Revision: 277649 URL: https://svnweb.freebsd.org/changeset/base/277649 Log: vmspace_release() may sleep if the last reference is being released, so add a WITNESS_WARN() to catch cases where it is called with a non-sleepable lock held. MFC after: 1 month Sponsored by: Sandvine Inc. Modified: head/sys/vm/vm_map.c Modified: head/sys/vm/vm_map.c ============================================================================== --- head/sys/vm/vm_map.c Sat Jan 24 15:49:40 2015 (r277648) +++ head/sys/vm/vm_map.c Sat Jan 24 16:59:38 2015 (r277649) @@ -344,6 +344,9 @@ void vmspace_free(struct vmspace *vm) { + WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, + "vmspace_free() called with non-sleepable lock held"); + if (vm->vm_refcnt == 0) panic("vmspace_free: attempt to free already freed vmspace");
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