Dear SUSE,

on my server with SLES 11 SP4 with kernel 3.0.101-71-default I tried to compile and use
the latest samba software with version 4.4.3. Compiling was not a problem, but using
the software leads to an unstable system, resulting in kernel messages like those:

May 9 15:27:18 geo kernel: [81924.433944] BUG: soft lockup - CPU#0 stuck for 23s! [smbd-notifyd:6073]
May 9 15:27:18 geo kernel: [81924.433948] Modules linked in: ip6t_LOG xt_tcpudp xt_pkttype ipt_LOG xt_limit binfmt_misc edd mpt3sas mpt2sas raid_class mptctl mptbase cpufreq_conservative cpufreq_userspace cpufreq_powersave acpi_cpufreq mperf microcode ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_raw xt_NOTRACK ipt_REJECT iptable_raw iptable_filter ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_ipv4 nf_defrag_ipv4 ip_tables xt_conntrack nf_conntrack ip6table_filter ip6_tables x_tables fuse xfs loop dm_mod sr_mod cdrom ipv6 ipv6_lib igb dca ipmi_si ses iTCO_wdt i2c_i801 mei ptp usb_storage ipmi_msghandler joydev pcspkr enclosure iTCO_vendor_support sg pps_core rtc_cmos button container shpchp pci_hotplug ext3 jbd mbcache usbhid hid ttm drm_kms_helper drm i2c_algo_bit sysimgblt sysfillrect i2c_core syscopyarea isci(X) libsas processor ehci_hcd scsi_transport_sas thermal_sys sd_mod crc_t10dif hwmon usbcore usb_common scsi_dh_rdac scsi_dh_hp_sw scsi_dh_emc scsi_dh_alua scsi_d
May 9 15:27:18 geo kernel: h ahci libahci libata megaraid_sas scsi_mod
May 9 15:27:18 geo kernel: [81924.434048] Supported: Yes, External
May 9 15:27:18 geo kernel: [81924.434050] CPU 0
May 9 15:27:18 geo kernel: [81924.434052] Modules linked in: ip6t_LOG xt_tcpudp xt_pkttype ipt_LOG xt_limit binfmt_misc edd mpt3sas mpt2sas raid_class mptctl mptbase cpufreq_conservative cpufreq_userspace cpufreq_powersave acpi_cpufreq mperf microcode ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_raw xt_NOTRACK ipt_REJECT iptable_raw iptable_filter ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_ipv4 nf_defrag_ipv4 ip_tables xt_conntrack nf_conntrack ip6table_filter ip6_tables x_tables fuse xfs loop dm_mod sr_mod cdrom ipv6 ipv6_lib igb dca ipmi_si ses iTCO_wdt i2c_i801 mei ptp usb_storage ipmi_msghandler joydev pcspkr enclosure iTCO_vendor_support sg pps_core rtc_cmos button container shpchp pci_hotplug ext3 jbd mbcache usbhid hid ttm drm_kms_helper drm i2c_algo_bit sysimgblt sysfillrect i2c_core syscopyarea isci(X) libsas processor ehci_hcd scsi_transport_sas thermal_sys sd_mod crc_t10dif hwmon usbcore usb_common scsi_dh_rdac scsi_dh_hp_sw scsi_dh_emc scsi_dh_alua scsi_d
May 9 15:27:18 geo kernel: h ahci libahci libata megaraid_sas scsi_mod
May 9 15:27:18 geo kernel: [81924.434131] Supported: Yes, External
May 9 15:27:18 geo kernel: [81924.434134]
May 9 15:27:18 geo kernel: [81924.434137] Pid: 6073, comm: smbd-notifyd Tainted: G X 3.0.101-71-default #1 Supermicro X9DR3-F/X9DR3-F

I saw some discussions concerning this problem where most people say this is a kernel
bug which can be triggered by samba, and Volker Lendecke from SerNet recommends downgrading
Samba to 4.2 and waiting for the next kernel where the issue is fixed, see:

http://samba.2283325.n4.nabble.com/A...td4702013.html
http://comments.gmane.org/gmane.linu....evergreen/153
https://bugs.launchpad.net/ubuntu/+s...x/+bug/1543980

My questions is, if kernel 3.0.101-71-default in SLES 11 SP4 also suffers from this bug
and if so, when it will be fixed.

Thanks for any answers,

Klaus