Messages in this thread | | | Date | Mon, 27 Nov 2017 20:57:32 +0100 | From | Michal Hocko <> | Subject | Re: [PATCH] mm: disable `vm.max_map_count' sysctl limit |
| |
On Mon 27-11-17 19:32:18, Michal Hocko wrote: > On Mon 27-11-17 09:25:16, Andi Kleen wrote: [...] > > The reason the limit was there originally because it allows a DoS > > attack against the kernel by filling all unswappable memory up with VMAs. > > We can reduce the effect by accounting vmas to memory cgroups.
As it turned out we already do. vm_area_cachep = KMEM_CACHE(vm_area_struct, SLAB_PANIC|SLAB_ACCOUNT);
-- Michal Hocko SUSE Labs
| |