Date: Fri, 21 Nov 2008 04:45:53 +0000 (UTC) From: Kip Macy <kmacy@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r185145 - user/kmacy/HEAD_fast_multi_xmit/sys/sys Message-ID: <200811210445.mAL4jrfi074234@svn.freebsd.org>
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Author: kmacy Date: Fri Nov 21 04:45:53 2008 New Revision: 185145 URL: http://svn.freebsd.org/changeset/base/185145 Log: safety check buf_ring_peek - assumes single-consumer Modified: user/kmacy/HEAD_fast_multi_xmit/sys/sys/buf_ring.h Modified: user/kmacy/HEAD_fast_multi_xmit/sys/sys/buf_ring.h ============================================================================== --- user/kmacy/HEAD_fast_multi_xmit/sys/sys/buf_ring.h Fri Nov 21 04:44:49 2008 (r185144) +++ user/kmacy/HEAD_fast_multi_xmit/sys/sys/buf_ring.h Fri Nov 21 04:45:53 2008 (r185145) @@ -233,6 +233,11 @@ static __inline void * buf_ring_peek(struct buf_ring *br) { +#ifdef DEBUG_BUFRING + if (!mtx_owned(br->br_lock)) + panic("lock not held on single consumer dequeue"); +#endif + mb(); return (br->br_ring[br->br_cons_tail]); }
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