On Mon, Oct 12, 2015 at 3:41 PM, Jeremy Martin <linuxfan24 at 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 > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > https://lists.centos.org/mailman/listinfo/centos-virt >