From mboxrd@z Thu Jan 1 00:00:00 1970 From: labbott@redhat.com (Laura Abbott) Date: Mon, 24 Oct 2016 10:58:10 -0700 Subject: [PATCH 00/10] arm64: move thread_info off of the task stack In-Reply-To: <20161024174840.GR15620@leverpostej> References: <1476904234-9511-1-git-send-email-mark.rutland@arm.com> <10401f46-cabc-23ec-a448-c377dbce7911@redhat.com> <20161024174840.GR15620@leverpostej> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 10/24/2016 10:48 AM, Mark Rutland wrote: > On Mon, Oct 24, 2016 at 10:38:59AM -0700, Laura Abbott wrote: >> On 10/19/2016 12:10 PM, Mark Rutland wrote: >>> Hi all, >>> >>> Building atop of Andy's work on x86 and generic code, these patches move >>> arm64's thread_info off of the stack and into task_struct. This protects >>> thread_info from corruption in the face of stack overflow, and serves as >>> a step towards fully robust stack overflow handling, which will be >>> addressed by subsequent patches. >>> >>> These patches are based atop of a preparatory series [1] (itself based >>> on v4.9-rc1) that's also necessary for s390. I've placed those patches >>> in a branch [2] on my kernel.org repo, along with this series [3]. I'm >>> hoping that the prep work will be able to become a stable branch/tag >>> soon. >>> >>> I've given the series some light testing on a couple of SMP arm64 >>> platforms, but this has yet to see a thorough beating; please do try to >>> make this fall over! >>> >>> Since RFC [4]: >>> * Rely on prior patches to make thread_info arch-specific >>> * Make smp_processor_id() use a per-cpu variable >>> * Split out current_stack_pointer >>> * Make SMP actually work >>> >>> [1] http://lkml.kernel.org/r/1476901693-8492-1-git-send-email-mark.rutland at arm.com >>> [2] https://git.kernel.org/cgit/linux/kernel/git/mark/linux.git/log/?h=core/ti-stack-split >>> [3] https://git.kernel.org/cgit/linux/kernel/git/mark/linux.git/log/?h=arm64/ti-stack-split >>> [4] http://lkml.kernel.org/r/1473947349-14521-1-git-send-email-mark.rutland at arm.com > >> I pulled the arm64/ti-stack-split branch on top of a Fedora >> tree and ran back-to-back kernel RPM builds for a long weekend. >> It's still going as of this morning so you can take that as a >> >> Tested-by: Laura Abbott > > Thanks! That's much appreciated! > > Just to check, did you grab the version with entry.S fixes rolled in > (where the head is 657f54256c427fec)? Ah I did not. That came in after I started the test. I'll start another run with the new version. > > Thanks, > Mark. > Thanks, Laura