On 09/02/2019 19:51, Sander Eikelenboom wrote: > On 09/02/2019 19:48, Juergen Gross wrote: >> On 09/02/2019 19:45, Sander Eikelenboom wrote: >>> On 09/02/2019 09:26, Sander Eikelenboom wrote: >>>> L.S., >>>> >>>> >>>> While testing a Linux 5.0-rc5-ish kernel (pull of yesterday) with some >>>> additional patches for >>>> already reported other issues i came across the issue below which i >>>> haven't seen with 4.20.x >>>> >>>> I haven't got a reproducer so i might be hard to hit it again, >>>> system is AMD and this is from the host kernel running under >>>> the Xen hypervisor might it matter. >>> >>>> -- >>>> >>>> Sander >>> >>> Hi Boris / Juergen, >>> >>> The commit causing this is: >>> 2c91bd4a4e2e530582d6fd643ea7b86b27907151 mm: speed up mremap by 20x on >>> large regions >>> >>> Since it seems there haven't been any other reports about this .. >>> could it be this doesn't specifically work well with a Xen PVH dom0 ? >> >> PVH? Not PV? > > Ah sorry, indeed PV !
Okay, found the problem. set_pmd_at() is used in above commit for writing a PMD entry with a page table address. In all other places it is used only for huge pages, which are not possible in PV guests. I'll send a patch on Monday. Juergen _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel