On 10/03/2019 21:35, Hans van Kranenburg wrote: > found -1 4.19.20-1 > thanks > > Hi, > > Reviving a thing from Jan 2017 here. I don't have this thread in my > mailbox, so no inline quotes. > > I just installed some HP z820 workstation and rebooted it into Xen > 4.11.1+26-g87f51bf366-3 with linux 4.19.20-1 as dom0 kernel. > > During boot I'm greeted by a long list of... > > [ 14.518793] mpt3sas 0000:02:00.0: swiotlb buffer is full (sz: 65536 > bytes) > [ 14.518899] mpt3sas 0000:02:00.0: swiotlb buffer is full > [ 14.518956] mpt3sas 0000:02:00.0: swiotlb buffer is full (sz: 65536 > bytes) > [ 14.518988] sd 6:0:3:0: pci_map_sg failed: request for 786432 bytes! > [ 14.519081] mpt3sas 0000:02:00.0: swiotlb buffer is full > [ 14.519309] sd 6:0:1:0: pci_map_sg failed: request for 1310720 bytes! > [ 14.524611] mpt3sas 0000:02:00.0: swiotlb buffer is full (sz: 65536 > bytes) > [ 14.527309] mpt3sas 0000:02:00.0: swiotlb buffer is full > [ 14.527405] sd 6:0:3:0: pci_map_sg failed: request for 786432 bytes! > [...] > > ...and some hangs here and there. This indeed did not happen when > booting just Linux, without Xen. > > Some searching brought me to this Debian bug. So, thanks for writing > down all kinds of research here already. Even if it's not fixed upstream > yet, this helps a lot. :-) > > Using dom0_mem=2GiB,max:4GiB instead of dom0_mem=2GiB,max:2GiB (which I > started with) makes the errors go away, so workaround confirmed. > > I can try any of the linked patches, but I see that in message 54, > https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=850425#54 > Andrew says: "IIRC, they were essentially rejected,". Next message, Ian > asks "Do you have a reference ?", but I don't see any fup on that. > > I think I'm fine with this workaround. > > If someone will ever work on the upstream patches, then this is just to > let know that I might be able to help testing. However, I only have one > of this type of box and it's gonna be installed as server at some > non-profit organization without OOB access, replacing even older donated > hardware, so, it will be kinda limited... :)
I think https://lists.xen.org/archives/html/xen-devel/2014-12/msg00699.html is the last attempt David made to upstream the fixes. Linux is still broken, and these fixes are still necessary. Boris/Juergen: Any chance you could look into these patches? I have no idea what they they're in against master, but its also liable its now more complicated with the host max mfn calculations which have gone in more recently. ~Andrew
