Re: [Xen-users] Xen PV boot "hangs" on sysklogd + apache

["J. Roeleveld" <joost@xxxxxxxxxxxx>]

On June 16, 2017 3:26:28 PM GMT+02:00, Niels Dettenbach <nd@xxxxxxxxxxxx> wrote:
>Hiho,
>
>
>may be someone of you has some idea or experience with this "crazy"
>effect.
>
>When starting a PV VM (Linux) it boots weel, as long as there is no
>Apache or sysklogd to start, which leads to hang then.
>
>If i boot into the PV (by going over that daemons) and start sysklogd,
>it seems to start correctly, but the init script could not exit.
>
>The same PV VMs wboot and work well on the old system.
>
>Same happens with different newer and older DomU kernels - so i assume
>this is related to anywhere in:
>
>       - dom0 kernel config
>       - XEN HV / dom0 setup
>
>it seems, Debian had a similiar "Bug" within their Dom0 too in the past
>- no idea how far this may be related:
>https://serverfault.com/questions/674543/kjournald-and-apache2-hang-on-xen-vps
>
>Possibly someone has an idea about,  a same experience or know what is
>wrong (any kernel config option)?
>
>
>tech specs:
>=========
>My new - self build - setup of XEN 4.7.2 (4.8.1-r1 seems not build)
>with Gentoo Linux dom0 should take over PV guests from an older machine
>with older XEN - anything compiled with GCC 5.4.0 (hardened) an AMD64 /
>core-avx-i.
>
>system is a HP DL580 G8 with 2*6 Core Intel(R) Xeon(R) CPU E7-4809 v2 @
>1.90GHz.
>
>
>Linux dom0 Kernel: 4.11.4
>
>
>#xl info
>host                   : xenlu1
>release                : 4.11.4-syndicat-dom0
>version                : #5 SMP Thu Jun 15 18:29:36 CEST 2017
>machine                : x86_64
>nr_cpus                : 24
>max_cpu_id             : 143
>nr_nodes               : 2
>cores_per_socket       : 6
>threads_per_core       : 2
>cpu_mhz                : 1895
>hw_caps                :
>b7ebfbff:77bee3ff:2c100800:00000001:00000001:00000281:00000000:00000100
>virt_caps              : hvm hvm_directio
>total_memory           : 65427
>free_memory            : 63561
>sharing_freed_memory   : 0
>sharing_used_memory    : 0
>outstanding_claims     : 0
>free_cpus              : 0
>xen_major              : 4
>xen_minor              : 7
>xen_extra              : .2
>xen_version            : 4.7.2
>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          :
>xen_commandline        : placeholder com1=115200,8n1 console=com1,vga
>dom0_mem=1024M,max:1024M loglvl=all guest_loglvl=all dom0_max_vcpus=2
>dom0_vcpus_pin noreboot no-bootscrub
>cc_compiler            : x86_64-pc-linux-gnu-gcc (Gentoo Hardened
>5.4.0-r3 p1.3, pie-0.6
>cc_compile_by          :
>cc_compile_domain      : syndicat.com
>cc_compile_date        : Thu Jun 15 20:07:49 CEST 2017
>build_id               : 3c397c1a85f8249e7da8c4ded0eb4be41a9c3d4e
>xend_config_format     : 4
>
>
>many thanks for any help / idea / hint,
>
>
>
>best regards,
>
>
>Niels.
>-- 
> ---
> Niels Dettenbach
> Syndicat IT & Internet
> http://www.syndicat.com
> PGP: https://syndicat.com/pub_key.asc
> ---
> 
>
>
>
>
>
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Can you provide the domain config of the guest?
Also, do you have /usr as a seperate volume? Or is that part of / (root)?

--
Joost
-- 
Sent from my Android device with K-9 Mail. Please excuse my brevity.

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