Messages in this thread | | | Subject | Re: [GIT PULL] arm64 fixes for 3.11 | From | Benjamin Herrenschmidt <> | Date | Sat, 27 Jul 2013 09:47:53 +1000 |
| |
On Fri, 2013-07-26 at 12:54 -0700, Linus Torvalds wrote: > > *Some* other 64-bit architectures do 16k stack sizes. But neither > x86-64 nor powerpc do, afaik. Instead, they do irq stacks, which is > generally a better idea than having one big stack.
Sadly you over estimated us here :-) We do 16K *and* irq stacks on 64-bit ... Remember our ABI with it's 112 bytes minimum per frame ?
It's been a while since I've last audited our actual usage mind you, we *might* be able to reduce it but at this stage, since our typical configs use a 64K base page size, it's not a big deal (ie, it's not an order-N allocation).
Cheers, Ben.
| |