On Thu, Jun 13, 2013 at 02:50:09PM -0700, Tejun Heo wrote: > (cc'ing Rafael and Oleg) > > On Thu, Jun 13, 2013 at 02:14:25PM -0700, Kent Overstreet wrote: > > Yeah, I think you're definitely right. (I only started reading up on the > > freezer stuff yesterday, though). > > > > Do you know offhand what existing (i.e. slab) allocators do? Whatever > > they do should make sense for us. > > I don't think the memory allocator does anything. Memory allocations > are guaranteed to make forward progress and everything should still be > working while freezing, so it doesn't need to do anything special. If > the tag allocator is to be used only by kernel proper - say drivers, > block layer, it shouldn't need to do anything special. If it's > directly exposed to userland via something like aio and the userland > is involved in guaranteeing forward progress - ie. freeing of tags - > then the allocator would need to be able to fail, I think.
That's a good point - as long as whatever is allocated is guaranteed to be freed in bounded time, we should be fine. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
