> I think Linux memory allocator devs could keep small preallocated buffer, return allocated space, and schedule independent maintenance after buffer gets low.

> I think Linux memory allocator devs could keep small preallocated buffer, return allocated space, and schedule independent maintenance after buffer gets low. It's already a possibilty. The gfp flags argument to kmalloc() may have the __GFP_HIGH flag set: "This allocation has high priority and may use emergency pools". However, it's use is generally discouraged and can really be only used in extremely specific situations.