On Mon, Oct 12, 2015 at 3:41 PM, Jeremy Martin linuxfan24@gmail.com wrote:
I am having an issue with Megacli when adding or removing virtual disks. I will post a link to fpaste that has the issue shown.
In brief whenever i add, or remove, a virtual disk via MegaCli the attempt succeeds and the adapter is configured but the OS remounts dm-0 in read only. dm-0 is my root lv. This issue does not happen if i boot into the default, non Xen, CentOS kernel. On stock CentOS kernel i can add and remove VD's all day without any issue at all. ONLY happens while booted up with the Xen kernel.
I have been racking my brain trying to figure this out. Any help is appreciated.
My system:
Dell Poweredge 2950 II PERC 5/i Controller
CentOS 6.7 Xen Version: 4.4.3-1.el6
Jeremy,
Sorry to send you to yet another place -- would you mind re-posting this error report to xen-users? This looks like a bug in the 3.18.17 kernel: either a bug in the driver (not using the proper interfaces), or a bug in the linux PV code on Xen. If that results in a patch, we can include it in the CentOS build.
Thanks, -George
Fpaste showing the console log messages during the event:
http://www.fpaste.org/277855/14445392/
Full XL dump below:
xl info host : cmhinfra1.* release : 3.18.17-13.el6.x86_64 version : #1 SMP Tue Jul 21 17:17:17 UTC 2015 machine : x86_64 nr_cpus : 8 max_cpu_id : 7 nr_nodes : 1 cores_per_socket : 4 threads_per_core : 1 cpu_mhz : 1995 hw_caps : bfebfbff:20100800:00000000:00000900:0004e33d:00000000:00000001:00000000 virt_caps : hvm total_memory : 32762 free_memory : 29340 sharing_freed_memory : 0 sharing_used_memory : 0 outstanding_claims : 0 free_cpus : 0 xen_major : 4 xen_minor : 4 xen_extra : .3-1.el6 xen_version : 4.4.3-1.el6 xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64 xen_scheduler : credit xen_pagesize : 4096 platform_params : virt_start=0xffff800000000000 xen_changeset : Thu Apr 23 15:06:13 2015 +0100 git:c5ec076-dirty xen_commandline : dom0_mem=1024M,max:1024M loglvl=all guest_loglvl=all console=tty0 console=com2 com2=57600 cc_compiler : gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16) cc_compile_by : mockbuild cc_compile_domain : centos.org cc_compile_date : Tue Sep 8 15:31:24 UTC 2015 xend_config_format : 4
grub.conf:
jeremym]# cat /etc/grub.conf # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You have a /boot partition. This means that # all kernel and initrd paths are relative to /boot/, eg. # root (hd0,0) # kernel /vmlinuz-version ro root=/dev/mapper/vg_cmhinfra1-lv_root # initrd /initrd-[generic-]version.img #boot=/dev/sdb default=0 timeout=5 #splashimage=(hd0,0)/grub/splash.xpm.gz #hiddenmenu serial --unit=1 --speed=57600 terminal --timeout console serial
title CentOS (3.18.17-13.el6.x86_64) root (hd0,0) kernel /xen.gz dom0_mem=1024M,max:1024M loglvl=all guest_loglvl=all console=tty0 console=com2 com2=57600 module /vmlinuz-3.18.17-13.el6.x86_64 ro root=/dev/mapper/vg_cmhinfra1-lv_root rd_LVM_LV=vg_cmhinfra1/lv_swap rd_LVM_LV=vg_cmhinfra1/lv_root console=hvc0 nomodset module /initramfs-3.18.17-13.el6.x86_64.img title CentOS (2.6.32-573.7.1.el6.x86_64) root (hd0,0) kernel /vmlinuz-2.6.32-573.7.1.el6.x86_64 ro root=/dev/mapper/vg_cmhinfra1-lv_root rd_NO_LUKS KEYBOARDTYPE=pc KEYTABLE=us LANG=en_US.UTF-8 rd_NO_MD rd_LVM_LV=vg_cmhinfra1/lv_swap SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_LVM_LV=vg_cmhinfra1/lv_root rd_NO_DM rhgb quiet console=ttyS1,57600 console=tty0
initrd /initramfs-2.6.32-573.7.1.el6.x86_64.img
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