Re: [Xen-devel] Guest OS boots up slowly

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

Hi Maskai,

Thanks for the report. It's a good idea to Cc the patch author when making
bug reports. In this case it's George Dunlap who I've cc'ed in this reply.

 -- Keir

On 31/08/2009 07:50, "Masaki Kanno" <kanno.masaki@xxxxxxxxxxxxxx> wrote:

> Hi,
> 
> I tested the latest xen-unstable (changeset: 20128) and the latest
> linux-2.6.18-xen (changeset: 931).  A guest OS is booted up slower
> than before.  And the following messages are shown by the guest OS.
> 
> Switching to new root and running init.
> unmounting old /dev
> unmounting old /proc
> unmounting old /sys
>   
>   ***************************************************************
>   ***************************************************************
>   ** WARNING: Currently emulating unsupported memory accesses  **
>   **          in /lib/tls glibc libraries. The emulation is    **
>   **          slow. To ensure full performance you should      **
>   **          install a 'xen-friendly' (nosegneg) version of   **
>   **          the library, or disable tls support by executing **
>   **          the following as root:                           **
>   **          mv /lib/tls /lib/tls.disabled                    **
>   ** Offending process: modprobe (pid=761)                     **
>   ***************************************************************
>   ***************************************************************
>   
> Pausing... 5<3>BUG: soft lockup detected on CPU#0!
>  [<c0151205>] softlockup_tick+0xa5/0xd0
>  [<c010978a>] timer_interrupt+0x2fa/0x6c0
>  [<c011d8c1>] __activate_task+0x21/0x40
>  [<c012fed0>] lock_timer_base+0x20/0x50
>  [<c0151563>] handle_IRQ_event+0x33/0xa0
>  [<c0151678>] __do_IRQ+0xa8/0x120
>  [<c01076e1>] do_IRQ+0x31/0x80
>  [<c02af6b0>] neigh_periodic_timer+0x0/0x140
>  [<c024ced5>] evtchn_do_upcall+0xe5/0x1f0
>  [<c0115fb0>] do_fixup_4gb_segment+0x0/0x170
>  [<c0105ba3>] hypervisor_callback+0x33/0x3b
>  [<c0115fb0>] do_fixup_4gb_segment+0x0/0x170
>  [<c01ed68b>] delay_tsc+0xb/0x20
>  [<c01ed6d6>] __delay+0x6/0x10
>  [<c01160f0>] do_fixup_4gb_segment+0x140/0x170
>  [<c0169597>] do_munmap+0x197/0x200
>  [<c01ee0a4>] copy_to_user+0x34/0x70
>  [<c0105b6b>] error_code+0x2b/0x30
> Continuing...
> 
> 
> FYI, when I reverted changeset 20122 of xen-unstable, the guest OS
> is booted up as before.
> 
> Best regards,
>  Kan
> 
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel



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