Date: Tue, 12 Dec 2000 21:13:03 -0800 (PST) From: Bosko Milekic <bmilekic@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/sys mbuf.h Message-ID: <200012130513.eBD5D4s83055@freefall.freebsd.org>
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bmilekic 2000/12/12 21:13:03 PST
Modified files:
sys/sys mbuf.h
Log:
Eliminate a race in MEXTFREE(). The reference counter decrement and test
was not atomic. We now make sure that we free the ext buf if the reference
count is about to reach 0 but also make sure that nobody else has done it
before us.
While I'm here, change refcnt to u_int (from long). This fixes a compiler
warning regarding use of atomic_cmpset_long on i386.
Submitted by: jasone
Reviewed by: jlemon, jake
Revision Changes Path
1.65 +17 -12 src/sys/sys/mbuf.h
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