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xen-devel
Re: [Xen-devel] Guest OS boots up slowly
Hmm, it appears my patch still debits credits for VMs that aren't
earning credits anymore; such VMs can earn an unlimited amount of
negative credit before becoming active again.
Try the attached patches; if it doesn't fix the problem, please take a
short trace during boot using the following command and send it to me:
# xentrace -D -e 0x2f000 -S 128 -s 1000 /tmp/sched-boot.trace
Thanks,
-George
On Mon, Aug 31, 2009 at 9:34 AM, Keir Fraser<keir.fraser@xxxxxxxxxxxxx> wrote:
> 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
>
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
>
debit-accounted-only.diff
Description: Text Data
trace-credit.diff
Description: Text Data
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