Date: Tue, 17 Nov 2015 18:40:17 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 204633] If INVARIANTS is enabled, free() may attempt to acquire sleeping lock Message-ID: <bug-204633-8-7UVvdgHnIq@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-204633-8@https.bugs.freebsd.org/bugzilla/> References: <bug-204633-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=204633 Mark Johnston <markj@FreeBSD.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |markj@FreeBSD.org --- Comment #1 from Mark Johnston <markj@FreeBSD.org> --- I think this indicates a bug in the caller rather than UMA. The nomenclature is a bit confusing: a sleep mutex is just a "default" mutex, i.e. a non-spin mutex. When a thread blocks on a sleep mutex, it enters bounded sleep; "sleep" in the free(9) man page refers to unbounded sleep. The assertion is failing because the thread holds a spin mutex or a critical section, in which case it is not valid to try and acquire a sleep mutex. It could probably be triggered in a non-INVARIANTS kernel too, since uma_zfree_arg() will attempt to acquire the corresponding zone lock, which is also a sleep mutex. -- You are receiving this mail because: You are the assignee for the bug.
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