[DragonFlyBSD - Bug #1429] (Feedback) vkernel bug - "mfree: m->m_nextpkt != NULL"

bugtracker-admin at leaf.dragonflybsd.org bugtracker-admin at leaf.dragonflybsd.org
Thu Jan 15 08:26:07 PST 2015

Issue #1429 has been updated by tuxillo.

Description updated
Category set to Kernel
Status changed from New to Feedback
Assignee deleted (0)
Target version set to 4.2.x

Hi Matt,

How do you exhaust mbufs?

Antonio Huete

Bug #1429: vkernel bug - "mfree: m->m_nextpkt != NULL"

* Author: dillon
* Status: Feedback
* Priority: Normal
* Assignee: 
* Category: Kernel
* Target version: 4.2.x
I get this in the vkernel, usually when I exhaust the mbuf objcache.

    The bug is the "mfree: m->m_nextpkt != NULL" message, not the mbuf
    exhaustion (while testing async write BIOs w/NFS I didn't slap any
    limits on how many it tried to run in parallel) <GRIN>.

					Matthew Dillon 
					<dillon at backplane.com>

# Warning, objcache(mbuf): Exhausted!
mfree: m->m_nextpkt != NULL
Trace beginning at frame 0x57869c58
m_free(8232e94,58bc9700,833791c,58bc97e4,57869c84) at 0x80ed998
m_free(58bc9700,1,576dabc8,57869cec,8159941) at 0x80ed998
m_freem(58bc9700,576dabc8,14,578c1f00,5847afe0) at 0x80ee444
ip_output(58bc9700,0,578c1efc,10000,0) at 0x8159941
udp_input(5847af00,0,58bc8d00,0,0) at 0x816a6d8
netmsg_pru_send(582feba8,0,82760e0,57869d84,8139e60) at 0x80f08a1
netmsg_service(582feba8,1,0,414003c0,833791c) at 0x8139a26
netmsg_service_loop(82760e0,0,0,0,0) at 0x8139e60
Warning, objcache(cluster mbuf): Exhausted!

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