From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Gleixner Date: Mon, 17 May 2021 20:08:48 +0200 Subject: [Intel-wired-lan] [PATCH tip:irq/core v1] genirq: remove auto-set of the mask when setting the hint In-Reply-To: References: <20210501021832.743094-1-jesse.brandeburg@intel.com> <16d8ca67-30c6-bb4b-8946-79de8629156e@arm.com> <20210504092340.00006c61@intel.com> Message-ID: <87sg2lz0zz.ffs@nanos.tec.linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: intel-wired-lan@osuosl.org List-ID: On Mon, May 17 2021 at 18:26, Robin Murphy wrote: > On 2021-05-17 17:57, Nitesh Lal wrote: > I'm not implying that there isn't a bug, or that this code ever made > sense in the first place, just that fixing it will unfortunately be a > bit more involved than a simple revert. This patch as-is *will* subtly > break at least the system PMU drivers currently using s/using/abusing/ > irq_set_affinity_hint() - those I know require the IRQ affinity to > follow whichever CPU the PMU context is bound to, in order to meet perf > core's assumptions about mutual exclusion. Which driver is that? Thanks, tglx