From mboxrd@z Thu Jan 1 00:00:00 1970 From: heiko.carstens@de.ibm.com (Heiko Carstens) Date: Mon, 25 Jul 2016 16:26:40 +0200 Subject: Is THREAD_INFO_IN_TASK appropriate for -mm for 4.8? In-Reply-To: <578DE406.9060902@de.ibm.com> References: <578DE406.9060902@de.ibm.com> Message-ID: <20160725142640.GA4337@osiris> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Tue, Jul 19, 2016 at 10:25:42AM +0200, Christian Borntraeger wrote: > On 07/19/2016 01:47 AM, Andy Lutomirski wrote: > > Hi all- > > > > There are four core patches needed for the THREAD_INFO_IN_TASK thing, > > and they apply cleanly to -mm now. The x86 patch to flip the feature > > on does not apply cleanly anywhere because it depends on changes in > > -tip *and* in -mm. I'd like to get all of this as well as the rest of > > the vmap-stacks stuff in by 4.9, but I'm wondering if it might make > > sense to get the core THREAD_INFO_IN_TASK stuff into -mm for 4.8 > > instead. > > > > Pros: > > - It reduces the amount of core code that -tip will have to carry until 4.9. > > - It may benefit other architectures. Christian Borntraeger > > expressed an interest in enabling the feature for s390, but it'll be > > awkward for him until the core bit landed. Similarly, arm64 seems to > > be interested. > > I have not yet talked to Martin/Heiko about this, so not sure yet if and when > s390 is going to use this - so no pressure from our side yet. I wrote a patch four weeks ago which converts s390 based on Linus' orginal patches. So yes, we will convert s390 as soon as this hits upstream.