On 04.08.20 21:41, David Hildenbrand wrote: > @Andrew can we give this a churn and consider it for v5.9 in case there > are no more comments? @Andrew, Ping, so I assume we'll target v5.10? > > Patch #1-#4,#6 have RBss or ACKs, patch #5 is virtio-mem stuff maintained > by me (and MST is aware). > > --- > > When introducing virtio-mem, the semantics of ZONE_MOVABLE were rather > unclear, which is why we special-cased ZONE_MOVABLE such that partially > plugged blocks would never end up in ZONE_MOVABLE. > > Now that the semantics are much clearer (and are documented in patch #6), > let's support partially plugged memory blocks in ZONE_MOVABLE, allowing > partially plugged memory blocks to be online to ZONE_MOVABLE and also > unplugging from such memory blocks. This avoids surprises when onlining > of memory blocks suddenly fails, just because they are not completely > populated by virtio-mem (yet). > > This is especially helpful for testing, but also paves the way for > virtio-mem optimizations, allowing more memory to get reliably unplugged. > > Cleanup has_unmovable_pages() and set_migratetype_isolate(), providing > better documentation of how ZONE_MOVABLE interacts with different kind of > unmovable pages (memory offlining vs. alloc_contig_range()). > > v3 -> v4: > - "mm/page_isolation: drop WARN_ON_ONCE() in set_migratetype_isolate()" > -- Fix typo in description > - "virtio-mem: don't special-case ZONE_MOVABLE" > -- Add more details why we initialli special-cased ZONE_MOVABLE (via MST) > - "mm: document semantics of ZONE_MOVABLE" > -- Rephrase some parts of documentation (via Mike) > > v2 -> v3: > - "mm: document semantics of ZONE_MOVABLE" > -- Fix a typo > > v1 -> v2: > - "mm/page_isolation: don't dump_page(NULL) in set_migratetype_isolate()" > -- Move to position 1, add Fixes: tag > -- Drop unused "out:" label > - "mm/page_isolation: drop WARN_ON_ONCE() in set_migratetype_isolate()" > -- Keep curly braces on "else" case > - Replace "[PATCH v1 5/6] mm/page_alloc: restrict ZONE_MOVABLE optimization > in has_unmovable_pages() to memory offlining" > by "mm: document semantics of ZONE_MOVABLE" > -- Brain dump of what I know about ZONE_MOVABLE > > David Hildenbrand (6): > mm/page_isolation: don't dump_page(NULL) in set_migratetype_isolate() > mm/page_alloc: tweak comments in has_unmovable_pages() > mm/page_isolation: drop WARN_ON_ONCE() in set_migratetype_isolate() > mm/page_isolation: cleanup set_migratetype_isolate() > virtio-mem: don't special-case ZONE_MOVABLE > mm: document semantics of ZONE_MOVABLE > > drivers/virtio/virtio_mem.c | 47 +++++++------------------------------ > include/linux/mmzone.h | 35 +++++++++++++++++++++++++++ > mm/page_alloc.c | 22 +++++------------ > mm/page_isolation.c | 39 ++++++++++++++---------------- > 4 files changed, 66 insertions(+), 77 deletions(-) > -- Thanks, David / dhildenb _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
