kexec August 2013

kexec@lists.fedoraproject.org

6 participants
18 discussions

Filtering inline comments from kdump.conf file.
by Wade Mealing 15 Aug '13

15 Aug '13

Fedora bug lodged: https://bugzilla.redhat.com/show_bug.cgi?id=997245 The RHEL 5 release of mkdumprd allowed for comments in the kdump file like this net 192.168.1.1 # this is the comment part The Fedora release of mkdumprd fails in many places when those directives use inline comments. I've attached a patch that seems to work for me, with basic testing. It should introduce no additional functionality to the system. Thanks, Wade Mealing

2 1

[PATCH v2] remove 98selinux dependency
by Dave Young 12 Aug '13

12 Aug '13

Chaowang measured the selinux load_policy memory usage, it need ~50M It's too much under kdump 2nd kernel, it cause more OOM then before. Here is the findings from Vivek: - If we don't load policy or don't do restorecon, kernel automatically uses a label for file as specified by file /sys/fs/selinux/initial_contexts/file On my system this value is "system_u:object_r:file_t:s0". Kernel enforces this label on a file if it is not labeled. That's the reason that you see above label on vmcore file when selinux policy was not loaded in second kernel or restorecon was not done. Note: I did some testing with rhel6 and there also I see file_t context. Not sure why that's the case. - Relabeling of root file system over boot happens if there is a file /.autorelabel present. This file is touched by systemd service fedora-autorelabel-mark.service. And this file comes from initscritps package. So if this service thinks that system was booted with selinux disabled it will put this file on root and when next time system boots with selinux enabled, relabeling is enforced by fedora-autorelabel.service service. - In our case relabeling is not happening after saving vmcore because there does not seem be any fedora-autorelabel-mark.service running from initramfs context. Looks like this service runs after switching to real root. Aug 08 10:44:13 vm9-f19 systemd[1]: Started Mark the need to relabel after reboot. - selinux poicy is now loaded by systemd after root switch has taken place. Aug 08 10:44:10 vm9-f19 systemd[1]: Successfully loaded SELinux policy in 357.693ms. So now we know that why selinux relabeling is not taking place. Reason being that systemd service which marks the file system for autorelabeling does not run from initramfs context. And it might not make to run this service from initramfs context before switch root. In general it makes sense to first switch to root, load selinux policy if needed and then check whether to mark this filesystem for relabel or not. Ideally root is mourted read only before that. It is just that we break this rule for kdump. So as long as we make sure we relabel files created by kdump after booting back, things should be fine. Since we will relabel the vmcore dir after reboot so let's remove the selinux dracut module dependency to avoid load_policy in 2nd kernel. If in the future load_policy memory usage shrinks to an acceptable level or there's a better solution we can add selinux load_policy back later. Signed-off-by: Dave Young <dyoung(a)redhat.com> --- dracut-module-setup.sh | 4 ---- 1 file changed, 4 deletions(-) --- kexec-tools.orig/dracut-module-setup.sh +++ kexec-tools/dracut-module-setup.sh @@ -15,10 +15,6 @@ check() { depends() { local _dep="base shutdown" - if sestatus 2>/dev/null | grep -q "SELinux status.*enabled"; then - _dep="$_dep selinux" - fi - if [ -d /sys/module/drm/drivers ]; then _dep="$_dep drm" fi

2 1

[PATCH] remove 98selinux dependency
by Dave Young 09 Aug '13

09 Aug '13

Chaowang measured the selinux load_policy memory usage, it need ~50M It's too much under kdump 2nd kernel, it cause more OOM then before. Since we will relabel the vmcore dir after reboot so let's remove the selinux dracut module dependency to avoid load_policy in 2nd kernel. If in the future load_policy memory usage shrinks to an acceptable level or there's a better solution we can add selinux load_policy back later. Signed-off-by: Dave Young <dyoung(a)redhat.com> --- dracut-module-setup.sh | 4 ---- 1 file changed, 4 deletions(-) --- kexec-tools.orig/dracut-module-setup.sh +++ kexec-tools/dracut-module-setup.sh @@ -15,10 +15,6 @@ check() { depends() { local _dep="base shutdown" - if sestatus 2>/dev/null | grep -q "SELinux status.*enabled"; then - _dep="$_dep selinux" - fi - if [ -d /sys/module/drm/drivers ]; then _dep="$_dep drm" fi

2 1

EFI kdump without acpi_rsdp
by Dave Young 08 Aug '13

08 Aug '13

Vivek I tried kdump without acpi_rsdp on your reserved machine. It can not boot similar with the initial report here: http://lists.infradead.org/pipermail/kexec/2010-March/003889.html Below is the detail kmsg, tried noacpi, noapic, nox2apic, they all does not help on this problem. [root@intel-canoepass-02 ~]# echo c >/proc/sysrq-trigger [ 288.091055] SysRq : Trigger a crash [ 288.094991] BUG: unable to handle kernel NULL pointer dereference at (null) [ 288.103755] IP: [<ffffffff813aee06>] sysrq_handle_crash+0x16/0x20 [ 288.110574] PGD 41ed3a067 PUD 41ef11067 PMD 0 [ 288.115573] Oops: 0002 [#1] SMP [ 288.119191] Modules linked in: nf_conntrack_netbios_ns nf_conntrack_broadcast ipt_MASQUERADE ip6table_nat nf_nat_ipv6 ip6table_mangle ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 iptable_nat nf_nat_ipv4 nf_nat iptable_mangle nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ebtable_filter ebtables ip6table_filter ip6_tables vfat fat acpi_cpufreq mperf coretemp kvm_intel kvm crc32_pclmul crc32c_intel ghash_clmulni_intel iTCO_wdt igb iTCO_vendor_support ptp microcode lpc_ich pps_core mfd_core ioatdma i2c_i801 dca mgag200 i2c_algo_bit drm_kms_helper ttm isci drm libsas i2c_core scsi_transport_sas wmi [ 288.179797] CPU 3 [ 288.181854] Pid: 1443, comm: bash Not tainted 3.9.8-300.fc19.x86_64 #1 Intel Corporation S2600CP/S2600CP [ 288.192633] RIP: 0010:[<ffffffff813aee06>] [<ffffffff813aee06>] sysrq_handle_crash+0x16/0x20 [ 288.202158] RSP: 0018:ffff880420bd5e70 EFLAGS: 00010096 [ 288.208083] RAX: 000000000000000f RBX: ffffffff81c9a100 RCX: ffff88042f66fb90 [ 288.216046] RDX: 0000000000000000 RSI: ffff88042f66df48 RDI: 0000000000000063 [ 288.224007] RBP: ffff880420bd5e70 R08: ffffffff81e97ddc R09: 000000000000084e [ 288.231967] R10: 000000000000084d R11: 0000000000000003 R12: 0000000000000063 [ 288.239927] R13: 0000000000000246 R14: 0000000000000007 R15: 0000000000000000 [ 288.247888] FS: 00007f2458bb7740(0000) GS:ffff88042f660000(0000) knlGS:0000000000000000 [ 288.256917] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 288.263329] CR2: 0000000000000000 CR3: 0000000425752000 CR4: 00000000001407e0 [ 288.271282] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 288.279244] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 288.287205] Process bash (pid: 1443, threadinfo ffff880420bd4000, task ffff880423811770) [ 288.296231] Stack: [ 288.298475] ffff880420bd5ea8 ffffffff813af4c2 0000000000000002 ffff8804246dc900 [ 288.306782] 00007f2458bbe000 0000000000000002 ffff880420bd5f50 ffff880420bd5ec8 [ 288.315091] ffffffff813af93a 00007f2458bbe000 ffff8804258ea600 ffff880420bd5f08 [ 288.323398] Call Trace: [ 288.326135] [<ffffffff813af4c2>] __handle_sysrq+0xa2/0x170 [ 288.332357] [<ffffffff813af93a>] write_sysrq_trigger+0x4a/0x50 [ 288.338968] [<ffffffff811fe809>] proc_reg_write+0x69/0xa0 [ 288.345096] [<ffffffff81199fcf>] vfs_write+0x9f/0x170 [ 288.350831] [<ffffffff8119a2c9>] sys_write+0x49/0xa0 [ 288.356473] [<ffffffff8164efd9>] system_call_fastpath+0x16/0x1b [ 288.363175] Code: e8 20 f8 ff ff eb c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 0f 1f 44 00 00 55 c7 05 04 7f ae 00 01 00 00 00 48 89 e5 0f ae f8 <c6> 04 25 00 00 00 00 01 5d c3 0f 1f 44 00 00 55 31 c0 c7 05 6e [ 288.385035] RIP [<ffffffff813aee06>] sysrq_handle_crash+0x16/0x20 [ 288.391944] RSP <ffff880420bd5e70> [ 288.395836] CR2: 0000000000000000 [ 0.000000] Initializing cgroup subsys cpuset [ 0.000000] Initializing cgroup subsys cpu [ 0.000000] Linux version 3.9.8-300.fc19.x86_64 (mockbuild@bkernel02) (gcc version 4.8.1 20130603 (Red Hat 4.8.1-1) (GCC) ) #1 SMP Thu Jun 27 19:24:23 UTC 2013 [ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-3.9.8-300.fc19.x86_64 root=/dev/mapper/fedora_intel--canoepass--02-root ro rd.md=0 rd.dm=0 rd.lvm.lv=fedora_intel-canoepass-02/root console=ttyS0,115200n81 vconsole.keymap=us rd.lvm.lv=fedora_intel-canoepass-02/swap rd.luks=0 vconsole.font=latarcyrheb-sun16 irqpoll nr_cpus=1 reset_devices cgroup_disable=memory mce=off numa=off udev.children-max=2 rd.memdebug=1 rd.break=cmdline earlyprintk=ttyS0,115200n8 memmap=exactmap memmap=636K@4K memmap=130412K@786432K elfcorehdr=916844K memmap=3076K#3060380K memmap=2048K#3106140K memmap=280K#3110812K memmap=848K#3111092K memmap=4K#3111940K memmap=120K#3111944K memmap=564K#3112064K [ 0.000000] e820: BIOS-provided physical RAM map: [ 0.000000] BIOS-e820: [mem 0x0000000000000100-0x000000000009ffff] usable [ 0.000000] BIOS-e820: [mem 0x00000000000a0000-0x00000000000fffff] reserved [ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x00000000b9f83fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000b9f84000-0x00000000b9f9efff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000b9f9f000-0x00000000ba556fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000ba557000-0x00000000ba558fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000ba559000-0x00000000ba8aefff] usable [ 0.000000] BIOS-e820: [mem 0x00000000ba8af000-0x00000000ba8d6fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000ba8d7000-0x00000000baa7ffff] usable [ 0.000000] BIOS-e820: [mem 0x00000000baa80000-0x00000000baa8ffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000baa90000-0x00000000baaa8fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000baaa9000-0x00000000baadffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000baae0000-0x00000000bab57fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bab58000-0x00000000bab5bfff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bab5c000-0x00000000bab67fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bab68000-0x00000000bab6bfff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bab6c000-0x00000000bab9bfff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bab9c000-0x00000000bababfff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000babac000-0x00000000babb1fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000babb2000-0x00000000babddfff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000babde000-0x00000000bac39fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bac3a000-0x00000000bac40fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bac41000-0x00000000baca6fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000baca7000-0x00000000bafa7fff] ACPI NVS [ 0.000000] BIOS-e820: [mem 0x00000000bafa8000-0x00000000bb04afff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bb04b000-0x00000000bb04efff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bb04f000-0x00000000bb06cfff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bb06d000-0x00000000bb070fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bb071000-0x00000000bb085fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bb086000-0x00000000bb089fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bb08a000-0x00000000bb163fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bb164000-0x00000000bb176fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bb177000-0x00000000bb187fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bb188000-0x00000000bb18bfff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bb18c000-0x00000000bb1f6fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bb1f7000-0x00000000bb1fefff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bb1ff000-0x00000000bd8d5fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bd8d6000-0x00000000bd8d9fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bd8da000-0x00000000bd956fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bd957000-0x00000000bdb56fff] ACPI NVS [ 0.000000] BIOS-e820: [mem 0x00000000bdb57000-0x00000000bdb5bfff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bdb5c000-0x00000000bdb5efff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bdb5f000-0x00000000bdcd5fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bdcd6000-0x00000000bdde6fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bdde7000-0x00000000bde2cfff] ACPI NVS [ 0.000000] BIOS-e820: [mem 0x00000000bde2d000-0x00000000bdf00fff] ACPI data [ 0.000000] BIOS-e820: [mem 0x00000000bdf01000-0x00000000bdf01fff] ACPI NVS [ 0.000000] BIOS-e820: [mem 0x00000000bdf02000-0x00000000bdf1ffff] ACPI data [ 0.000000] BIOS-e820: [mem 0x00000000bdf20000-0x00000000bdfacfff] ACPI NVS [ 0.000000] BIOS-e820: [mem 0x00000000bdfad000-0x00000000bdffffff] usable [ 0.000000] BIOS-e820: [mem 0x00000000be000000-0x00000000cfffffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000fec00000-0x00000000fec00fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000fed19000-0x00000000fed19fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000fed1c000-0x00000000fed1ffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000fee00000-0x00000000fee00fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000ffc00000-0x00000000ffffffff] reserved [ 0.000000] BIOS-e820: [mem 0x0000000100000000-0x000000083fffffff] usable [ 0.000000] bootconsole [earlyser0] enabled [ 0.000000] e820: last_pfn = 0x840000 max_arch_pfn = 0x400000000 [ 0.000000] NX (Execute Disable) protection: active [ 0.000000] e820: user-defined physical RAM map: [ 0.000000] user: [mem 0x0000000000001000-0x000000000009ffff] usable [ 0.000000] user: [mem 0x0000000030000000-0x0000000037f5afff] usable [ 0.000000] user: [mem 0x00000000baca7000-0x00000000bafa7fff] ACPI data [ 0.000000] user: [mem 0x00000000bd957000-0x00000000bdb56fff] ACPI data [ 0.000000] user: [mem 0x00000000bdde7000-0x00000000bdfacfff] ACPI data [ 0.000000] DMI not present or invalid. [ 0.000000] No AGP bridge found [ 0.000000] e820: last_pfn = 0x37f5b max_arch_pfn = 0x400000000 [ 0.000000] x86 PAT enabled: cpu 0, old 0x7010600070106, new 0x7010600070106 [ 0.000000] x2apic enabled by BIOS, switching to x2apic ops [ 0.000000] found SMP MP-table at [mem 0x000fcaf0-0x000fcaff] mapped at [ffff8800000fcaf0] [ 0.000000] Using GB pages for direct mapping [ 0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff] [ 0.000000] init_memory_mapping: [mem 0x37400000-0x375fffff] [ 0.000000] init_memory_mapping: [mem 0x34000000-0x373fffff] [ 0.000000] init_memory_mapping: [mem 0x30000000-0x33ffffff] [ 0.000000] init_memory_mapping: [mem 0x37600000-0x37f5afff] [ 0.000000] RAMDISK: [mem 0x377ac000-0x37f48fff] [ 0.000000] ACPI BIOS Bug: Error: A valid RSDP was not found (20130117/tbxfroot-218) [ 0.000000] NUMA turned off [ 0.000000] Faking a node at [mem 0x0000000000000000-0x0000000037f5afff] [ 0.000000] Initmem setup node 0 [mem 0x00000000-0x37f5afff] [ 0.000000] NODE_DATA [mem 0x37798000-0x377abfff] [ 0.000000] Zone ranges: [ 0.000000] DMA [mem 0x00001000-0x00ffffff] [ 0.000000] DMA32 [mem 0x01000000-0xffffffff] [ 0.000000] Normal empty [ 0.000000] Movable zone start for each node [ 0.000000] Early memory node ranges [ 0.000000] node 0: [mem 0x00001000-0x0009ffff] [ 0.000000] node 0: [mem 0x30000000-0x37f5afff] [ 0.000000] SFI: Simple Firmware Interface v0.81 http://simplefirmware.org [ 0.000000] Intel MultiProcessor Specification v1.4 [ 0.000000] MPTABLE: OEM ID: INTEL [ 0.000000] MPTABLE: Product ID: ROMLEY [ 0.000000] MPTABLE: APIC at: 0xFEE00000 [ 0.000000] BUG: unable to handle kernel paging request at ffffffffff5f8020 [ 0.000000] IP: [<ffffffff8103c5a3>] native_apic_mem_read+0x3/0x10 [ 0.000000] PGD 36c0f067 PUD 36c11067 PMD 36e4b067 PTE 0 [ 0.000000] Oops: 0000 [#1] SMP [ 0.000000] Modules linked in: [ 0.000000] CPU 0 [ 0.000000] Pid: 0, comm: swapper Not tainted 3.9.8-300.fc19.x86_64 #1 [ 0.000000] RIP: 0010:[<ffffffff8103c5a3>] [<ffffffff8103c5a3>] native_apic_mem_read+0x3/0x10 [ 0.000000] RSP: 0000:ffffffff81c01e38 EFLAGS: 00010046 [ 0.000000] RAX: ffffffff81c20d40 RBX: ffff8800000fcaf0 RCX: 0000000000000025 [ 0.000000] RDX: 00000000000000ca RSI: 0000000000000046 RDI: 0000000000000020 [ 0.000000] RBP: ffffffff81c01e48 R08: 3a454c424154504d R09: 000000000000008b [ 0.000000] R10: 7830203a74612043 R11: 3030303030454546 R12: 0000000000000000 [ 0.000000] R13: 000000000079c9ba R14: 00000000000004d4 R15: ffffffffff475510 [ 0.000000] FS: 0000000000000000(0000) GS:ffffffff81cef000(0000) knlGS:0000000000000000 [ 0.000000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 0.000000] CR2: ffffffffff5f8020 CR3: 0000000036c0c000 CR4: 00000000000000b0 [ 0.000000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 0.000000] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 0.000000] Process swapper (pid: 0, threadinfo ffffffff81c00000, task ffffffff81c13440) [ 0.000000] Stack: [ 0.000000] ffffffff81c01e48 ffffffff81037116 ffffffff81c01e60 ffffffff81d15bde [ 0.000000] ffff8800000fcaf0 ffffffff81c01ed8 ffffffff81d14e9b ffffffffff475000 [ 0.000000] ffffffff81c01e88 ffffffff8162ecf3 4e49ffff81c01ed8 ff000000004c4554 [ 0.000000] Call Trace: [ 0.000000] [<ffffffff81037116>] ? read_apic_id+0x16/0x30 [ 0.000000] [<ffffffff81d15bde>] register_lapic_address+0x60/0x89 [ 0.000000] [<ffffffff81d14e9b>] default_get_smp_config+0x24b/0x3e9 [ 0.000000] [<ffffffff8162ecf3>] ? sfi_unmap_memory+0x23/0x40 [ 0.000000] [<ffffffff81d0b001>] setup_arch+0xc51/0xd11 [ 0.000000] [<ffffffff8163c832>] ? printk+0x67/0x69 [ 0.000000] [<ffffffff81d04ba6>] start_kernel+0xd4/0x3fe [ 0.000000] [<ffffffff81d04120>] ? early_idt_handlers+0x120/0x120 [ 0.000000] [<ffffffff81d045da>] x86_64_start_reservations+0x2a/0x2c [ 0.000000] [<ffffffff81d046cf>] x86_64_start_kernel+0xf3/0x100 [ 0.000000] Code: 81 f0 0f ab 01 eb 91 90 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 90 55 89 ff 48 89 e5 89 b7 00 80 5f ff 5d c3 66 90 55 89 ff <8b> 87 00 80 5f ff 48 89 e5 5d c3 66 90 55 48 8b 05 d0 a6 7c 00 [ 0.000000] RIP [<ffffffff8103c5a3>] native_apic_mem_read+0x3/0x10 [ 0.000000] RSP <ffffffff81c01e38> [ 0.000000] CR2: ffffffffff5f8020 [ 0.000000] ---[ end trace a7919e7f17c0a725 ]--- [ 0.000000] Kernel panic - not syncing: Attempted to kill the idle task! [ 0.000000] BUG: unable to handle kernel paging request at ffffffffff5f8030 [ 0.000000] IP: [<ffffffff8103c5a3>] native_apic_mem_read+0x3/0x10 [ 0.000000] PGD 36c0f067 PUD 36c11067 PMD 36e4b067 PTE 0 [ 0.000000] Oops: 0000 [#2] SMP [ 0.000000] Modules linked in: [ 0.000000] CPU 0 [ 0.000000] Pid: 0, comm: swapper Tainted: G D 3.9.8-300.fc19.x86_64 #1 [ 0.000000] RIP: 0010:[<ffffffff8103c5a3>] [<ffffffff8103c5a3>] native_apic_mem_read+0x3/0x10 [ 0.000000] RSP: 0000:ffffffff81c01a58 EFLAGS: 00010002 [ 0.000000] RAX: ffffffff81c20d40 RBX: 0000000000000046 RCX: 0000000000000002 [ 0.000000] RDX: 0000000000000002 RSI: 0000000000000001 RDI: 0000000000000030 [ 0.000000] RBP: ffffffff81c01a70 R08: 0000000000000001 R09: 0000000000000002 [ 0.000000] R10: ffffffff81ce2b70 R11: 216b73617420656c R12: 0000000000000000 [ 0.000000] R13: ffffffff81ce2b70 R14: 0000000000000000 R15: ffffffff81c13440 [ 0.000000] FS: 0000000000000000(0000) GS:ffffffff81cef000(0000) knlGS:0000000000000000 [ 0.000000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 0.000000] CR2: ffffffffff5f8030 CR3: 0000000036c0c000 CR4: 00000000000000b0 [ 0.000000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 0.000000] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 0.000000] Process swapper (pid: 0, threadinfo ffffffff81c00000, task ffffffff81c13440) [ 0.000000] Stack: [ 0.000000] ffffffff81c01a70 ffffffff81037664 0000000000000046 ffffffff81c01a80 [ 0.000000] ffffffff810378f2 ffffffff81c01aa8 ffffffff8103692e ffffffff819e7c78 [ 0.000000] 0000000000000000 0000000000000046 ffffffff81c01b20 ffffffff8163c695 [ 0.000000] Call Trace: [ 0.000000] [<ffffffff81037664>] ? clear_local_APIC+0x34/0x2a0 [ 0.000000] [<ffffffff810378f2>] disable_local_APIC+0x22/0x50 [ 0.000000] [<ffffffff8103692e>] native_stop_other_cpus+0xde/0x160 [ 0.000000] [<ffffffff8163c695>] panic+0xd7/0x1d7 [ 0.000000] [<ffffffff81062c89>] do_exit+0x939/0xa20 [ 0.000000] [<ffffffff8163c832>] ? printk+0x67/0x69 [ 0.000000] [<ffffffff81647ce3>] oops_end+0xa3/0xe0 [ 0.000000] [<ffffffff8163c168>] no_context+0x263/0x270 [ 0.000000] [<ffffffff8163c1e8>] __bad_area_nosemaphore+0x73/0x1cc [ 0.000000] [<ffffffff8163c354>] bad_area_nosemaphore+0x13/0x15 [ 0.000000] [<ffffffff8164a8ae>] __do_page_fault+0x31e/0x510 [ 0.000000] [<ffffffff8105d73c>] ? print_time.part.4+0x6c/0x90 [ 0.000000] [<ffffffff8105d7cf>] ? print_prefix+0x6f/0xb0 [ 0.000000] [<ffffffff8105d8fa>] ? msg_print_text+0xea/0x1d0 [ 0.000000] [<ffffffff8103fb7c>] ? early_serial_write+0x2c/0x60 [ 0.000000] [<ffffffff81646826>] ? _raw_spin_unlock_irqrestore+0x16/0x20 [ 0.000000] [<ffffffff81646826>] ? _raw_spin_unlock_irqrestore+0x16/0x20 [ 0.000000] [<ffffffff8105ea75>] ? wake_up_klogd+0x5/0x50 [ 0.000000] [<ffffffff8164aaae>] do_page_fault+0xe/0x10 [ 0.000000] [<ffffffff81647158>] page_fault+0x28/0x30 [ 0.000000] [<ffffffff8103c5a3>] ? native_apic_mem_read+0x3/0x10 [ 0.000000] [<ffffffff81037116>] ? read_apic_id+0x16/0x30 [ 0.000000] [<ffffffff81d15bde>] register_lapic_address+0x60/0x89 [ 0.000000] [<ffffffff81d14e9b>] default_get_smp_config+0x24b/0x3e9 [ 0.000000] [<ffffffff8162ecf3>] ? sfi_unmap_memory+0x23/0x40 [ 0.000000] [<ffffffff81d0b001>] setup_arch+0xc51/0xd11 [ 0.000000] [<ffffffff8163c832>] ? printk+0x67/0x69 [ 0.000000] [<ffffffff81d04ba6>] start_kernel+0xd4/0x3fe [ 0.000000] [<ffffffff81d04120>] ? early_idt_handlers+0x120/0x120 [ 0.000000] [<ffffffff81d045da>] x86_64_start_reservations+0x2a/0x2c [ 0.000000] [<ffffffff81d046cf>] x86_64_start_kernel+0xf3/0x100 [ 0.000000] Code: 81 f0 0f ab 01 eb 91 90 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 90 55 89 ff 48 89 e5 89 b7 00 80 5f ff 5d c3 66 90 55 89 ff <8b> 87 00 80 5f ff 48 89 e5 5d c3 66 90 55 48 8b 05 d0 a6 7c 00 [ 0.000000] RIP [<ffffffff8103c5a3>] native_apic_mem_read+0x3/0x10 [ 0.000000] RSP <ffffffff81c01a58> [ 0.000000] CR2: ffffffffff5f8030 [ 0.000000] ---[ end trace a7919e7f17c0a726 ]--- -- Thanks Dave

2 12

mail in fedora list is encoded!
by Baoquan He 05 Aug '13

05 Aug '13

Hi Vivek, In fedora list is encoded by base64, now when I try to save it as patch in mutt, the content is meaningless. I can't use 'git am' to apply the saved patch. Could you please check and change it? I think if base64 is set, it's unnecessary for fedora kexec mailing list. In other mailing list, like kdump, the charset is us-ascii. Content-Type: text/plain; charset=us-ascii in fedora kexec list, the charset is utf-8, and is encoded. Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64

2 2

[Fedora Patch] dracut-kdump.sh: add do_dump() and error out if dump vmcore fails
by WANG Chao 01 Aug '13

01 Aug '13

do_dump() takes care of dump procedure. It'll error out if failing to save vmcore. Signed-off-by: WANG Chao <chaowang(a)redhat.com> --- dracut-kdump.sh | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/dracut-kdump.sh b/dracut-kdump.sh index 5d18b9a..deed0ac 100755 --- a/dracut-kdump.sh +++ b/dracut-kdump.sh @@ -24,6 +24,20 @@ MOUNTS="" export PATH=$PATH:$KDUMP_SCRIPT_DIR +do_dump() +{ + local _ret + + eval $DUMP_INSTRUCTION + _ret=$? + + if [ $_ret -ne 0 ]; then + echo "kdump: saving vmcore failed" + fi + + return $_ret +} + do_umount() { if [ -n "$MOUNTS" ]; then @@ -305,7 +319,7 @@ if [ $? -ne 0 ]; then do_final_action fi -$DUMP_INSTRUCTION +do_dump DUMP_RETVAL=$? do_kdump_post $DUMP_RETVAL -- 1.8.3.1

2 1

[Fedora Patch] dracut-kdump.sh: error out if dump vmcore fails
by WANG Chao 01 Aug '13

01 Aug '13

We should output a message if dump vmcore fails. Signed-off-by: WANG Chao <chaowang(a)redhat.com> --- dracut-kdump.sh | 1 + 1 file changed, 1 insertion(+) diff --git a/dracut-kdump.sh b/dracut-kdump.sh index 5d18b9a..dea8e9f 100755 --- a/dracut-kdump.sh +++ b/dracut-kdump.sh @@ -314,6 +314,7 @@ if [ $? -ne 0 ]; then fi if [ $DUMP_RETVAL -ne 0 ]; then + echo "kdump: saving vmcore fail" do_default_action fi -- 1.8.3.1

3 3

There is no message displayed if dump was not saved successfully
by Vivek Goyal 01 Aug '13

01 Aug '13

Hi Chao, Recently you put a commit to output various messages related to dump. Today I was saving dump and it failed but there is no message on console saying dump failed. I think we should display a message on console if dump saving failed. Can you please look into it. Thanks Vivek

2 1

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kexec August 2013