New IMQ patch Problem...

dashang.trivedi · 12-01-2011, 11:33 PM

I have compile 2.6.39.4 Kernel .....its works successfully ...
But after that i have applied PATCH of IMQ 2.6.39 with multi-queue. and IPTables 1.4.10 ...
Patch is applied successfully but in /var/log/messages its display

Code:

Dec 01 15:36:38 1322733998 kernel: ------------[ cut here ]------------
Dec 01 15:36:38 1322733998 kernel: WARNING: at net/sched/sch_hfsc.c:1427 hfsc_dequeue+0x1aa/0x2c2 [sch_hfsc]()
Dec 01 15:36:38 1322733998 kernel: Hardware name: VMware Virtual Platform
Dec 01 15:36:38 1322733998 kernel: Modules linked in: imq ipt_REJECT cls_fw sch_sfq ipt_MASQUERADE sch_hfsc xt_IMQ xt_connmark arpta
ble_filter arp_tables xt_NOTRACK ipt_REDIRECT xt_hashlimit xt_tcpudp xt_mark xt_state xt_multiport xt_set ip_set_hash_net ip_set_has
h_ip ip_set nfnetlink iptable_raw iptable_filter iptable_mangle iptable_nat ip_tables x_tables nf_nat_tftp nf_nat_pptp nf_nat_proto_
gre nf_nat_irc nf_nat_ftp nf_nat nf_conntrack_tftp nf_conntrack_pptp nf_conntrack_proto_gre nf_conntrack_irc nf_conntrack_ftp af_pac
ket pppoe pppox ppp_generic slhc pcnet32 nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 8021q BusLogic [last unloaded: imq]
Dec 01 15:36:38 1322733998 kernel: Pid: 0, comm: kworker/0:0 Tainted: G        W   2.6.39.4-1smp #2
Dec 01 15:36:38 1322733998 kernel: Call Trace:
Dec 01 15:36:38 1322733998 kernel:  [<c1026548>] warn_slowpath_common+0x65/0x7a
Dec 01 15:36:38 1322733998 kernel:  [<d0f023be>] ? hfsc_dequeue+0x1aa/0x2c2 [sch_hfsc]
Dec 01 15:36:38 1322733998 kernel:  [<c102656c>] warn_slowpath_null+0xf/0x13
Dec 01 15:36:38 1322733998 kernel:  [<d0f023be>] hfsc_dequeue+0x1aa/0x2c2 [sch_hfsc]
Dec 01 15:36:38 1322733998 kernel:  [<c11c0626>] __qdisc_run+0x70/0xe4
Dec 01 15:36:38 1322733998 kernel:  [<c11acd21>] net_tx_action+0x9c/0xe6
Dec 01 15:36:38 1322733998 kernel:  [<c102a936>] __do_softirq+0x6b/0xe5
Dec 01 15:36:38 1322733998 kernel:  [<c102a8cb>] ? __local_bh_enable+0x68/0x68
Dec 01 15:36:38 1322733998 kernel:  <IRQ>  [<c102a847>] ? irq_exit+0x32/0x3b
Dec 01 15:36:38 1322733998 kernel:  [<c10149f2>] ? smp_apic_timer_interrupt+0x6e/0x7c
Dec 01 15:36:38 1322733998 kernel:  [<c121ea5a>] ? apic_timer_interrupt+0x2a/0x30
Dec 01 15:36:38 1322733998 kernel:  [<c100779b>] ? default_idle+0x2e/0x43
Dec 01 15:36:38 1322733998 kernel:  [<c100198c>] ? cpu_idle+0x3a/0x52
Dec 01 15:36:38 1322733998 kernel:  [<c121a243>] ? start_secondary+0x190/0x195
Dec 01 15:36:38 1322733998 kernel: ---[ end trace 393581315ab6411e ]---
Dec 01 15:36:38 1322733998 kernel: ------------[ cut here ]------------
Dec 01 15:36:38 1322733998 kernel: WARNING: at net/sched/sch_hfsc.c:1427 hfsc_dequeue+0x1aa/0x2c2 [sch_hfsc]()
Dec 01 15:36:38 1322733998 kernel: Hardware name: VMware Virtual Platform
Dec 01 15:36:38 1322733998 kernel: Modules linked in: imq ipt_REJECT cls_fw sch_sfq ipt_MASQUERADE sch_hfsc xt_IMQ xt_connmark arpta
ble_filter arp_tables xt_NOTRACK ipt_REDIRECT xt_hashlimit xt_tcpudp xt_mark xt_state xt_multiport xt_set ip_set_hash_net ip_set_has
h_ip ip_set nfnetlink iptable_raw iptable_filter iptable_mangle iptable_nat ip_tables x_tables nf_nat_tftp nf_nat_pptp nf_nat_proto_
gre nf_nat_irc nf_nat_ftp nf_nat nf_conntrack_tftp nf_conntrack_pptp nf_conntrack_proto_gre nf_conntrack_irc nf_conntrack_ftp af_pac
ket pppoe pppox ppp_generic slhc pcnet32 nf_conntrack_ipv4 nf_c0x32/0x3b
Dec 01 15:36:38 1322733998 kernel:  [<c10149f2>] ? smp_apic_timer_interrupt+0x6e/0x7c
Dec 01 15:36:38 1322733998 kernel:  [<c121ea5a>] ? apic_timer_interrupt+0x2a/0x30
Dec 01 15:36:38 1322733998 kernel:  [<c100779b>] ? default_idle+0x2e/0x43
Dec 01 15:36:38 1322733998 kernel:  [<c100198c>] ? cpu_idle+0x3a/0x52
Dec 01 15:36:38 1322733998 kernel:  [<c121a243>] ? start_secondary+0x190/0x195
Dec 01 15:36:38 1322733998 kernel: ---[ end trace 393581315ab64148 ]---
Dec 01 15:36:38 1322733998 kernel: ------------[ cut here ]------------
Dec 01 15:36:38 1322733998 kernel: WARNING: at net/sched/sch_hfsc.c:1427 hfsc_dequeue+0x1aa/0x2c2 [sch_hfsc]()
Dec 01 15:36:38 1322733998 kernel: Hardware name: VMware Virtual Platform

this message is continuesly display in /var/log/message and dmesg ....

in config file IMQ RELATED configuration is ..

Code:

CONFIG_NETFILTER_XT_TARGET_IMQ=m
CONFIG_IMQ=m
# CONFIG_IMQ_BEHAVIOR_AA is not set
CONFIG_IMQ_BEHAVIOR_AB=y
# CONFIG_IMQ_BEHAVIOR_BA is not set
# CONFIG_IMQ_BEHAVIOR_BB is not set
CONFIG_IMQ_NUM_DEVS=16

Please tell me how to solve this problem

jb_gpk · 12-05-2011, 04:02 AM

Hello!

this lines are the footprints of the warning:

Quote:

Dec 01 15:36:38 1322733998 kernel: [<c1026548>] warn_slowpath_common+0x65/0x7a
Dec 01 15:36:38 1322733998 kernel: [<d0f023be>] ? hfsc_dequeue+0x1aa/0x2c2 [sch_hfsc]
Dec 01 15:36:38 1322733998 kernel: [<c102656c>] warn_slowpath_null+0xf/0x13
Dec 01 15:36:38 1322733998 kernel: [<d0f023be>] hfsc_dequeue+0x1aa/0x2c2 [sch_hfsc]
Dec 01 15:36:38 1322733998 kernel: [<c11c0626>] __qdisc_run+0x70/0xe4
Dec 01 15:36:38 1322733998 kernel: [<c11acd21>] net_tx_action+0x9c/0xe6
Dec 01 15:36:38 1322733998 kernel: [<c102a936>] __do_softirq+0x6b/0xe5
Dec 01 15:36:38 1322733998 kernel: [<c102a8cb>] ? __local_bh_enable+0x68/0x68
Dec 01 15:36:38 1322733998 kernel: <IRQ> [<c102a847>] ? irq_exit+0x32/0x3b
Dec 01 15:36:38 1322733998 kernel: [<c10149f2>] ? smp_apic_timer_interrupt+0x6e/0x7c
Dec 01 15:36:38 1322733998 kernel: [<c121ea5a>] ? apic_timer_interrupt+0x2a/0x30
Dec 01 15:36:38 1322733998 kernel: [<c100779b>] ? default_idle+0x2e/0x43
Dec 01 15:36:38 1322733998 kernel: [<c100198c>] ? cpu_idle+0x3a/0x52
Dec 01 15:36:38 1322733998 kernel: [<c121a243>] ? start_secondary+0x190/0x195

and this line tell us exactly where the WARNING happened

Quote:

Dec 01 15:36:38 1322733998 kernel: WARNING: at net/sched/sch_hfsc.c:1427 hfsc_dequeue+0x1aa/0x2c2 [sch_hfsc]()

what lead us to the following piece of code:

Code:

hfsc_schedule_watchdog(struct Qdisc *sch)
{
        struct hfsc_sched *q = qdisc_priv(sch);
        struct hfsc_class *cl;
        u64 next_time = 0;

        cl = eltree_get_minel(q);
        if (cl)
                next_time = cl->cl_e;
        if (q->root.cl_cfmin != 0) {
                if (next_time == 0 || next_time > q->root.cl_cfmin)
                        next_time = q->root.cl_cfmin;
        }
        WARN_ON(next_time == 0);
        qdisc_watchdog_schedule(&q->watchdog, next_time);
}

wich is only called here on the function hfsc_dequeue:

Code:

 
...

cl = eltree_get_mindl(q, cur_time);
        if (cl) {
                realtime = 1;
        } else {
                /*
                 * use link-sharing criteria
                 * get the class with the minimum vt in the hierarchy
                 */
                cl = vttree_get_minvt(&q->root, cur_time);
                if (cl == NULL) {
                        sch->qstats.overlimits++;
                        hfsc_schedule_watchdog(sch);
                        return NULL;
                }
        }
...

I'm curious about this, so I will try to reproduce this here on a virtual machine
but for a quick answer you should post this on the IMQ mailing list: http://tech.groups.yahoo.com/group/linuximq/

If you find a solution please post it here.