On Sat, May 16, 2020 at 4:39 PM David Miller <da...@davemloft.net> wrote: > > From: Shakeel Butt <shake...@google.com> > Date: Sat, 16 May 2020 15:35:46 -0700 > > > So, my argument is if non-zero order vzalloc has failed (allocations > > internal to vzalloc, including virtual mapping allocation and page > > table allocations, are order 0 and use GFP_KERNEL i.e. triggering > > reclaim and oom-killer) then the next non-zero order page allocation > > has very low chance of succeeding. > > Also not true. > > Page table allocation strategies and limits vary by architecture, they > may even need virtual mappings themselves. So they can fail in situations > where a non-zero GFP_KERNEL page allocator allocation would succeed.
Thanks for the explanation. Do you think calling vzalloc only for non-zero order here has any value?
