Re: VM in Xen 4.1; poor packet forwarding performance on xn0
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. > ___ freebsd-xen@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-xen To unsubscribe, send any mail to "freebsd-xen-unsubscr...@freebsd.org"
Re: kern/186375: [xen] FreeBSD 10 is very unstable on Xen 4.1(XCP 1.6)
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. ___ freebsd-xen@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-xen To unsubscribe, send any mail to "freebsd-xen-unsubscr...@freebsd.org"
Current problem reports assigned to freebsd-xen@FreeBSD.org
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. ___ freebsd-xen@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-xen To unsubscribe, send any mail to "freebsd-xen-unsubscr...@freebsd.org"
