Hello, In XenServer we have seen the watchdog occasionally triggering during domain creation if 1GB pages are scrubbed in-place during physmap population. The following series attempt to mitigate this by adding preemption to page scrubbing in populate_physmap(). Also a new limit and command line option to signal the maximum allocation order when doing in-place scrubbing. This is set by default to CONFIG_PTDOM_MAX_ORDER.
Thanks, Roger. Roger Pau Monne (4): xen/mm: remove aliasing of PGC_need_scrub over PGC_allocated xen/mm: enforce SCRUB_DEBUG checks for MEMF_no_scrub allocations xen/mm: allow deferred scrub of physmap populate allocated pages xen/mm: limit non-scrubbed allocations to a specific order docs/misc/xen-command-line.pandoc | 13 ++++ xen/arch/arm/include/asm/mm.h | 10 +-- xen/arch/ppc/include/asm/mm.h | 10 +-- xen/arch/riscv/include/asm/mm.h | 10 +-- xen/arch/x86/include/asm/mm.h | 18 ++--- xen/common/domain.c | 24 +++++++ xen/common/memory.c | 108 ++++++++++++++++++++++++++++-- xen/common/page_alloc.c | 32 +++++++-- xen/include/xen/mm.h | 14 ++++ xen/include/xen/sched.h | 5 ++ 10 files changed, 202 insertions(+), 42 deletions(-) -- 2.51.0
