Re: VM in Xen 4.1; poor packet forwarding performance on xn0

2014-04-28 Thread seanr...@gmail.com
Hi Roger,

This is what they provided me:
- The Xen 4.x node is running a custom 3.1.1 kernel.
- The Xen 3.x node is running a 2.6.18 kernel.

They didn't elaborate on the customisations. :(

Sean



On Sat, Apr 26, 2014 at 1:06 PM, Roger Pau Monné wrote:

> On 26/04/14 13:57, seanr...@gmail.com wrote:
> > Hi Roger,
> >
> > Thanks for the patch -- sadly, it didn't work. No change.
>
> Hello,
>
> >
> > I did have to modify a bit for releng/10.0; for some reason patch
> > refused to apply it cleanly. It looked fairly straightforward but I
> > attached inline the patch I ultimately applied below just in case I got
> > it wrong.
>
> Patch looks fine.
>
> > Are there any other potential differences between Xen 3.4 and 4.1? (my
> > provider migrated my problem VPS to a 3.4 host and the problem
> > evaporated; I am trying this on a new 4.1 VPS that I was able to
> > reproduce the problem on).
>
> I'm quite sure this is not related to the underlying Xen version, but to
> the Linux Dom0 kernel version your provider is using, could you ask them
> the Linux versions they are using on the 4.1 and 3.4 hosts?
>
> Roger.
>
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Re: kern/186375: [xen] FreeBSD 10 is very unstable on Xen 4.1(XCP 1.6)

2014-04-28 Thread Roger Pau Monné
The following reply was made to PR kern/186375; it has been noted by GNATS.

From: =?ISO-8859-1?Q?Roger_Pau_Monn=E9?= 
To: Kensaku MASUDA 
Cc: 
Subject: Re: kern/186375: [xen] FreeBSD 10 is very unstable on Xen 4.1(XCP
 1.6)
Date: Mon, 28 Apr 2014 17:49:03 +0200

 On 28/04/14 14:37, Kensaku MASUDA wrote:
 > Hello, Roger.
 > 
 > In the PR you mention that the VM crashes/panics, could you please
 > provide the complete logs of the crash and the panics? Without those it
 > is impossible to diagnose the problem, much less try to fix it.
 > 
 > 
 > Sorry, It was already deleted with VM. and disassembled Xen 4.1(XCP 1.6)
 > resource pool.
 > Now, my resource pool is upgraded about Xen 4.2(XenServer 6.2 SP1). But
 > I get same situation /w FreeBSD version 10-stable.
 > And successfull collect log.
 > 
 > a FreeBSD VM running on Xen 4.4/4.5, and so far I haven't seen any of
 > this issues.
 > 
 >  
 > FreeBSD 10 STABLE on Xen 4.2(XenServer 6.2) are stable than 10 RELEASE
 > on Xen 4.1, But it was randomly stall/panic/crash.
 
 I'm not sure I understand your last sentence correctly, sorry. Do you
 mean that 10-STABLE works fine on XenServer 6.2 and 10-RELEASE doesn't?
 
 The dump provided seems to be from 10-STABLE, so I guess both are affected?
 
 The crash itself doesn't happen on Xen code (it's in geom AFAICT), so
 it's kind of hard for me to figure out what's going on there.
 
 The following line in ps output seems quite worrying:
 
   0   999 1   0   20  0 50168 17979214322466816 g_waitfo Ds-
 0:00.29 [bsnmpd]
 
 bsnmpd seems to be using a huge amount of memory, have you tried
 disabling it?
 
 Also, from vmstat -m:
 
 ip6ndp 18446744073708511156 18014398509416956K   -   41  32,64,128
 
 Can you provide a little more info about the VM itself, from the logs I
 see it has 4CPUs and 1024MB of RAM. Which kind of workload were you
 running inside of it when the crash happened?
 
 Could you try installing a vanilla 10-RELEASE VM using the ISOs on
 ftp.freebsd.org, and run the same workload (without xe-guest-utilities,
 bsnmpd or anything not strictly necessary).
 
 Roger.
 
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Current problem reports assigned to freebsd-xen@FreeBSD.org

2014-04-28 Thread FreeBSD bugmaster
Note: to view an individual PR, use:
  http://www.freebsd.org/cgi/query-pr.cgi?pr=(number).

The following is a listing of current problems submitted by FreeBSD users.
These represent problem reports covering all versions including
experimental development code and obsolete releases.


S Tracker  Resp.  Description

o bin/188990   xen[xen] dhclient(8) does not accept DHCP Offer on FreeBS
o kern/188369  xen[xen] [panic] FreeBSD 10 XENHVM panic under NetBSD Dom
o kern/188261  xen[xen] FreeBSD DomU PVHVM guests cannot 'route' traffic
o kern/186375  xen[xen] FreeBSD 10 is very unstable on Xen 4.1(XCP 1.6)
o kern/183397  xen[xen] [panic] Kernel panic at first incoming ssh under
o kern/183139  xen[xen] [patch] ifconfig options on xn0 lost after xen v
o kern/180788  xen[xen] [panic] XEN PV kernel 9.2-BETA1 panics on boot
o kern/180403  xen[xen] Problems with GENERIC and XENHVM kernels with Xe
o kern/180402  xen[xen] XEN kernel does not load in XenClient 4.5.5
o kern/179814  xen[xen] mountroot fails with error=19 under Xen on 9-STA
o kern/176471  xen[xen] xn driver crash on detach
o kern/176053  xen[xen] [patch] i386: Correct wrong usage of vsnprintf()
o kern/175954  xen[xen] XENHVM xn network driver extreme packet loss dur
o kern/175822  xen[xen] FreeBSD 9.1 does not work with Xen 4.0
o kern/175757  xen[xen] [patch] xen pvhvm looses keyboard input from VNC
o kern/171873  xen[xen] xn network device floods warning in dmesg
o kern/166174  xen[xen] Problems ROOT MOUNT ERROR 
o kern/165418  xen[xen] Problems mounting root filesystem from XENHVM
o kern/164630  xen[xen] XEN HVM kernel: run_interrupt_driven_hooks: stil
o kern/164450  xen[xen] Failed to install FreeeBSD 9.0-RELEASE from CD i
o kern/162677  xen[xen] FreeBSD not compatible with "Current Stable Xen"
o kern/161318  xen[xen] sysinstall crashes with floating point exception
o kern/155468  xen[xen] Xen PV i386 multi-kernel CPU system is not worki
o kern/155353  xen[xen] [patch] put "nudging TOD" message under boot_ver
o kern/154833  xen[xen]: xen 4.0 - DomU freebsd8.2RC3 i386, XEN kernel. 
o kern/154473  xen[xen] xen 4.0 - DomU freebsd8.1 i386, XEN kernel. Not 
o kern/154472  xen[xen] xen 4.0 - DomU freebsd8.1 i386 xen kernel reboot
o kern/154428  xen[xen] xn0 network interface and PF - Massive performan
o kern/153674  xen[xen] i386/XEN idle thread shows wrong percentages
o kern/153672  xen[xen] [panic] i386/XEN panics under heavy fork load
o kern/153620  xen[xen] Xen guest system clock drifts in AWS EC2 (FreeBS
o kern/153477  xen[xen] XEN pmap code abuses vm page queue lock
o kern/153150  xen[xen] xen/ec2: disable checksum offloading on interfac
o kern/152228  xen[xen] [panic] Xen/PV panic with machdep.idle_mwait=1
o kern/144629  xen[xen] FreeBSD 8-RELEASE XEN pvm networking doesn't wor
o kern/143398  xen[xen] FreeBSD 8-RELEASE XEN pvm networking doesn't wor
o kern/143340  xen[xen] FreeBSD 8-RELEASE XEN pvm networking doesn't wor
f kern/143069  xen[xen] [panic] Xen Kernel Panic - Memory modified after
f kern/135667  xenufs filesystem corruption on XEN DomU system
f kern/135421  xen[xen] FreeBSD Xen PVM DomU network failure - netfronc.
f kern/135178  xen[xen] Xen domU outgoing data transfer stall when TSO i
p kern/135069  xen[xen] FreeBSD-current/Xen SMP doesn't function at all 
f i386/124516  xen[xen] FreeBSD-CURRENT Xen Kernel Segfaults when config
o kern/118734  xen[xen] FreeBSD 6.3-RC1 and FreeBSD 7.0-BETA 4 fail to b

44 problems total.

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