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Date:      Thu, 26 Oct 2017 17:48:59 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-net@FreeBSD.org
Subject:   [Bug 221990] panic: Assertion reclaimable == delta failed at ../../../net/iflib.c:1947
Message-ID:  <bug-221990-2472-C3arxqBjZR@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-221990-2472@https.bugs.freebsd.org/bugzilla/>
References:  <bug-221990-2472@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D221990

--- Comment #5 from Stephen Hurd <shurd@FreeBSD.org> ---
Can you try with this:

Index: sys/net/iflib.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- sys/net/iflib.c     (revision 324937)
+++ sys/net/iflib.c     (working copy)
@@ -1931,6 +1931,7 @@

        }
 done:
+       MPASS(n =3D=3D i =3D=3D 0);
        DBG_COUNTER_INC(rxd_flush);
        if (fl->ifl_pidx =3D=3D 0)
                pidx =3D fl->ifl_size - 1;

It looks like ifl_credits could get out of sync in the error paths here, but
I'm not sure you're hitting any of them.

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