Hi Krzysztof, On Mon, 3 Jun 2019 16:35:22 +0200 Krzysztof Kozlowski wrote: > > On Mon, 3 Jun 2019 at 16:32, Stephen Rothwell wrote: > > > > On Mon, 3 Jun 2019 16:10:40 +0200 Krzysztof Kozlowski wrote: > > > > > > Indeed it looks like effect of merge conflict resolution or applying. > > > When I look at MMOTS, it is the same as yours: > > > http://git.cmpxchg.org/cgit.cgi/linux-mmots.git/commit/?id=b77b8cce67f246109f9d87417a32cd38f0398f2f > > > > > > However in linux-next it is different. > > > > > > Stephen, any thoughts? > > > > Have you had a look at today's linux-next? It looks correct in > > there. Andrew updated his patch series over the weekend. > > Yes, I am looking at today's next. Both the source code and the commit > 728e0fbf263e3ed359c10cb13623390564102881 have wrong "if (merged)" (put > in wrong hunk). OK, I have replaced that commit with this: From: "Uladzislau Rezki (Sony)" Subject: mm/vmalloc.c: get rid of one single unlink_va() when merge It does not make sense to try to "unlink" the node that is definitely not linked with a list nor tree. On the first merge step VA just points to the previously disconnected busy area. On the second step, check if the node has been merged and do "unlink" if so, because now it points to an object that must be linked. Link: http://lkml.kernel.org/r/20190527151843.27416-4-urezki@gmail.com Signed-off-by: Uladzislau Rezki (Sony) Acked-by: Hillf Danton Cc: Ingo Molnar Cc: Joel Fernandes Cc: Matthew Wilcox Cc: Michal Hocko Cc: Oleksiy Avramchenko Cc: Roman Gushchin Cc: Steven Rostedt Cc: Tejun Heo Cc: Thomas Garnier Cc: Thomas Gleixner Signed-off-by: Andrew Morton --- mm/vmalloc.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) --- a/mm/vmalloc.c~mm-vmap-get-rid-of-one-single-unlink_va-when-merge +++ a/mm/vmalloc.c @@ -719,9 +719,6 @@ merge_or_add_vmap_area(struct vmap_area /* Check and update the tree if needed. */ augment_tree_propagate_from(sibling); - /* Remove this VA, it has been merged. */ - unlink_va(va, root); - /* Free vmap_area object. */ kmem_cache_free(vmap_area_cachep, va); @@ -746,12 +743,11 @@ merge_or_add_vmap_area(struct vmap_area /* Check and update the tree if needed. */ augment_tree_propagate_from(sibling); - /* Remove this VA, it has been merged. */ - unlink_va(va, root); + if (merged) + unlink_va(va, root); /* Free vmap_area object. */ kmem_cache_free(vmap_area_cachep, va); - return; } } _ Which is the patch from mmots but with different line numbers. -- Cheers, Stephen Rothwell