From mboxrd@z Thu Jan 1 00:00:00 1970 From: benh@kernel.crashing.org (Benjamin Herrenschmidt) Date: Sat, 27 Jul 2013 09:47:53 +1000 Subject: [GIT PULL] arm64 fixes for 3.11 In-Reply-To: References: <20130726155458.GA31613@arm.com> Message-ID: <1374882473.9200.33.camel@pasglop> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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.