Re: [Xen-devel] Xen 4.9 + kernel 4.13rc2 -- ballooning regression? reappearance of "Over-allocation for domain 1" errors
On 03/08/17 00:43, Boris Ostrovsky wrote: > On 08/02/2017 08:01 AM, Juergen Gross wrote: >> On 01/08/17 16:28, PGNet Dev wrote: >>> On 7/28/17 9:02 AM, PGNet Dev wrote: On 7/27/17 11:23 PM, Juergen Gross wrote: > Can you please post the domain's config file used to create the domain > and the kernel config? Sure. https://pastebin.com/M6cr2pX7 >>> Any add'l info needed? >> No, I don't think so. >> >> IMO the problem is related to the fact that the balloon driver tries to >> use then kernel's view of how much memory it is owning and setting this >> number in relation to Xen's view how much memory it should try to have. >> >> Maybe before adding memory from Xen the kernel should ask the hypervisor >> how much memory it has already from Xen's point of view and how much it >> is allowed to have. This will avoid the messages you have seen as long >> as there are no interfering actions from Xen (e.g. lowering the maximum >> reservation) while the kernel is trying to balloon up. > > Could this be caused by your recent ballooning patch > (96edd61dcf44362d3ef0bed1a5361e0ac7886a63)? Only by trying to reduce the domain's memory via "xl mem-set" before the balloon driver was initialized and then adding memory after the balloon driver has been started. Other than that I have no idea how my patch would result in such a behavior. Juergen ___ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
Re: [Xen-devel] Xen 4.9 + kernel 4.13rc2 -- ballooning regression? reappearance of "Over-allocation for domain 1" errors
On 08/02/2017 08:01 AM, Juergen Gross wrote: > On 01/08/17 16:28, PGNet Dev wrote: >> On 7/28/17 9:02 AM, PGNet Dev wrote: >>> On 7/27/17 11:23 PM, Juergen Gross wrote: Can you please post the domain's config file used to create the domain and the kernel config? >>> Sure. >>> >>>https://pastebin.com/M6cr2pX7 >>> >> Any add'l info needed? > No, I don't think so. > > IMO the problem is related to the fact that the balloon driver tries to > use then kernel's view of how much memory it is owning and setting this > number in relation to Xen's view how much memory it should try to have. > > Maybe before adding memory from Xen the kernel should ask the hypervisor > how much memory it has already from Xen's point of view and how much it > is allowed to have. This will avoid the messages you have seen as long > as there are no interfering actions from Xen (e.g. lowering the maximum > reservation) while the kernel is trying to balloon up. Could this be caused by your recent ballooning patch (96edd61dcf44362d3ef0bed1a5361e0ac7886a63)? -boris ___ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
Re: [Xen-devel] Xen 4.9 + kernel 4.13rc2 -- ballooning regression? reappearance of "Over-allocation for domain 1" errors
On 01/08/17 16:28, PGNet Dev wrote: > On 7/28/17 9:02 AM, PGNet Dev wrote: >> On 7/27/17 11:23 PM, Juergen Gross wrote: >>> Can you please post the domain's config file used to create the domain >>> and the kernel config? >> >> Sure. >> >>https://pastebin.com/M6cr2pX7 >> > > Any add'l info needed? No, I don't think so. IMO the problem is related to the fact that the balloon driver tries to use then kernel's view of how much memory it is owning and setting this number in relation to Xen's view how much memory it should try to have. Maybe before adding memory from Xen the kernel should ask the hypervisor how much memory it has already from Xen's point of view and how much it is allowed to have. This will avoid the messages you have seen as long as there are no interfering actions from Xen (e.g. lowering the maximum reservation) while the kernel is trying to balloon up. Juergen ___ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
Re: [Xen-devel] Xen 4.9 + kernel 4.13rc2 -- ballooning regression? reappearance of "Over-allocation for domain 1" errors
On 7/28/17 9:02 AM, PGNet Dev wrote: On 7/27/17 11:23 PM, Juergen Gross wrote: Can you please post the domain's config file used to create the domain and the kernel config? Sure. https://pastebin.com/M6cr2pX7 Any add'l info needed? ___ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
Re: [Xen-devel] Xen 4.9 + kernel 4.13rc2 -- ballooning regression? reappearance of "Over-allocation for domain 1" errors
On 7/27/17 11:23 PM, Juergen Gross wrote: Can you please post the domain's config file used to create the domain and the kernel config? Sure. https://pastebin.com/M6cr2pX7 ___ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
Re: [Xen-devel] Xen 4.9 + kernel 4.13rc2 -- ballooning regression? reappearance of "Over-allocation for domain 1" errors
On 27/07/17 20:20, PGNet Dev wrote: > I've upgraded a Xen server's > > xen-4.9.0_08-517.2.x86_64 > xen-libs-4.9.0_08-517.2.x86_64 > > kernel from 4.12x to 4.13x > > uname -rm > 4.13.0-rc2-2.gb545b87-default x86_64 > > After upgrading, I see in my Dom0-attached serial console, a steady stream of, > > ... > (XEN) [2017-07-27 18:00:25] d1v0 Over-allocation for domain 1: 524545 > > 524544 > (XEN) [2017-07-27 18:00:58] d1v0 Over-allocation for domain 1: 524545 > > 524544 > (XEN) [2017-07-27 18:01:31] d1v0 Over-allocation for domain 1: 524545 > > 524544 > (XEN) [2017-07-27 18:02:04] d1v0 Over-allocation for domain 1: 524545 > > 524544 > (XEN) [2017-07-27 18:02:36] d1v0 Over-allocation for domain 1: 524545 > > 524544 > ... > > every 32-33 seconds. Can you please post the domain's config file used to create the domain and the kernel config? Juergen ___ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
