On Wed 11-09-19 15:20:02, Michal Hocko wrote: [...] > > 4. Continuously report, not the "one time report everything" approach. > > So you mean the allocator reporting this rather than an external code to > poll right? I do not know, how much this is nice to have than must have?
Another idea that I haven't really thought through so it might turned out to be completely bogus but let's try anyway. Your "report everything" just made me look and realize that free_pages_prepare already performs stuff that actually does something similar yet unrelated. We do report to special page poisoning, zeroying or CONFIG_DEBUG_PAGEALLOC to unmap the address from the kernel address space. This sounds like something fitting your model no? -- Michal Hocko SUSE Labs
