From mboxrd@z Thu Jan 1 00:00:00 1970 From: alex.bennee@linaro.org (Alex =?utf-8?Q?Benn=C3=A9e?=) Date: Mon, 09 Oct 2017 10:34:25 +0100 Subject: [PATCH v2 26/28] arm64/sve: Add documentation In-Reply-To: <20171006173715.GC3611@e103592.cambridge.arm.com> References: <1504198860-12951-1-git-send-email-Dave.Martin@arm.com> <1504198860-12951-27-git-send-email-Dave.Martin@arm.com> <59D7A4AF.40408@arm.com> <20171006173715.GC3611@e103592.cambridge.arm.com> Message-ID: <878tgkbr6m.fsf@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Dave Martin writes: > On Fri, Oct 06, 2017 at 04:43:43PM +0100, Szabolcs Nagy wrote: >> On 31/08/17 18:00, Dave Martin wrote: >> > +9. System runtime configuration >> > +-------------------------------- >> > + >> > +* To mitigate the ABI impact of expansion of the signal frame, a policy >> > + mechanism is provided for administrators, distro maintainers and developers >> > + to set the default vector length for userspace processes: >> > + >> > +/proc/cpu/sve_default_vector_length >> >> >> elsewhere in the patch series i see >> >> /proc/sys/abi/sve_default_vector_length >> >> is this supposed to be the same? > > Good spot, thanks! > > /proc/cpu/ was the old location: they should both say /proc/abi/. > I'll fix it. Isn't /sys (or rather sysfs) the preferred location for modern control knobs that mirror the kernels object model or is SVE a special case for extending /proc? > > ---Dave -- Alex Benn?e