Messages in this thread | | | From | Arnd Bergmann <> | Subject | Re: [RFC PATCH 2/2] arm64: Implement vmalloc based thread_info allocator | Date | Mon, 25 May 2015 22:29:40 +0200 |
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On Monday 25 May 2015 19:47:15 Catalin Marinas wrote: > On 25 May 2015, at 13:01, Jungseok Lee <jungseoklee85@gmail.com> wrote: > > >> Could the stack size be reduced to 8KB perhaps? > > > > I guess probably not. > > > > A commit, 845ad05e, says that 8KB is not enough to cover SpecWeb benchmark. > > We could go back to 8KB stacks if we implement support for separate IRQ > stack on arm64. It's not too complicated, we would have to use SP0 for (kernel) threads > and SP1 for IRQ handlers.
I think most architectures that see a lot of benchmarks have moved to irqstacks at some point, that definitely sounds like a useful idea, even if the implementation turns out to be a bit more tricky than what you describe.
There are a lot of workloads that would benefit from having lower per-thread memory cost.
Arnd
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