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Date:      Wed, 14 Jun 2017 11:17:58 +0200
From:      Peter Holm <peter@holm.cc>
To:        Sean Bruno <sbruno@FreeBSD.org>
Cc:        src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject:   Re: svn commit: r319921 - head/sys/net
Message-ID:  <20170614091758.GA86374@x2.osted.lan>
In-Reply-To: <201706132316.v5DNGdF2042725@repo.freebsd.org>
References:  <201706132316.v5DNGdF2042725@repo.freebsd.org>

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On Tue, Jun 13, 2017 at 11:16:39PM +0000, Sean Bruno wrote:
> Author: sbruno
> Date: Tue Jun 13 23:16:38 2017
> New Revision: 319921
> URL: https://svnweb.freebsd.org/changeset/base/319921
> 
> Log:
>   Add new sysctl to allow changing of timing of the txq timers.
>   
>   Add new sysctl to override use of busdma in the driver.
>   
>   Submitted by:	Drew Gallitin <gallatin@netflix.com>
> 
> Modified:
>   head/sys/net/iflib.c
> 
> Modified: head/sys/net/iflib.c
> ==============================================================================
> --- head/sys/net/iflib.c	Tue Jun 13 22:57:57 2017	(r319920)

Could this be yours?

panic: Assertion ifsd_m[next] == NULL failed at ../../../net/iflib.c:2927
cpuid = 12
time = 1497431647
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe104fa993d0
vpanic() at vpanic+0x19c/frame 0xfffffe104fa99450
kassert_panic() at kassert_panic+0x126/frame 0xfffffe104fa994c0
iflib_txq_drain() at iflib_txq_drain+0xdf0/frame 0xfffffe104fa99640
drain_ring_lockless() at drain_ring_lockless+0xc0/frame 0xfffffe104fa996a0
ifmp_ring_enqueue() at ifmp_ring_enqueue+0x32e/frame 0xfffffe104fa99710
iflib_if_transmit() at iflib_if_transmit+0xb0/frame 0xfffffe104fa99750
ether_output() at ether_output+0x750/frame 0xfffffe104fa997f0
ip_output() at ip_output+0x14c3/frame 0xfffffe104fa99930
tcp_output() at tcp_output+0xf8c/frame 0xfffffe104fa99ad0
tcp_usr_send() at tcp_usr_send+0x3bd/frame 0xfffffe104fa99b40
sosend_generic() at sosend_generic+0x3ba/frame 0xfffffe104fa99bf0
clnt_vc_call() at clnt_vc_call+0x4b8/frame 0xfffffe104fa99d40
clnt_reconnect_call() at clnt_reconnect_call+0xe8/frame 0xfffffe104fa99de0
newnfs_request() at newnfs_request+0x1092/frame 0xfffffe104fa99f60
nfscl_request() at nfscl_request+0x5b/frame 0xfffffe104fa99fb0
nfsrpc_lookup() at nfsrpc_lookup+0x211/frame 0xfffffe104fa9a120
nfs_lookup() at nfs_lookup+0x463/frame 0xfffffe104fa9a460
VOP_LOOKUP_APV() at VOP_LOOKUP_APV+0xfe/frame 0xfffffe104fa9a490
lookup() at lookup+0x6e2/frame 0xfffffe104fa9a530
namei() at namei+0x534/frame 0xfffffe104fa9a5f0
kern_statat() at kern_statat+0x9b/frame 0xfffffe104fa9a800
freebsd11_lstat() at freebsd11_lstat+0x33/frame 0xfffffe104fa9a980
amd64_syscall() at amd64_syscall+0x564/frame 0xfffffe104fa9aab0
Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe104fa9aab0
--- syscall (190, FreeBSD ELF64, freebsd11_lstat), rip = 0x800910c7a, rsp = 0x7fffffffaed8, rbp = 0x7fffffffaf00 --

- Peter



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