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[98.179.76.75]) by smtp.gmail.com with ESMTPSA id a28sm46494qtm.80.2020.12.06.13.46.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 06 Dec 2020 13:46:28 -0800 (PST) References: <20201205014340.148235-1-jsnitsel@redhat.com> <20201205014340.148235-2-jsnitsel@redhat.com> <87y2ia7rbv.fsf@nanos.tec.linutronix.de> User-agent: mu4e 1.4.10; emacs 27.1 From: Jerry Snitselaar To: Thomas Gleixner In-reply-to: <87y2ia7rbv.fsf@nanos.tec.linutronix.de> Date: Sun, 06 Dec 2020 14:46:26 -0700 Message-ID: <87lfeahakt.fsf@redhat.com> MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jsnitsel@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Subject: Re: [Intel-gfx] [PATCH v3 1/4] irq: export kstat_irqs X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, James Bottomley , Jason Gunthorpe , Jarkko Sakkinen , Matthew Garrett , linux-integrity@vger.kernel.org, Peter Huewe Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Thomas Gleixner @ 2020-12-06 10:54 MST: > Jerry, > > On Fri, Dec 04 2020 at 18:43, Jerry Snitselaar wrote: > > The proper prefix is 'genirq:' git log kernel/irq/irqdesc.c would have > told you. > >> To try and detect potential interrupt storms that >> have been occurring with tpm_tis devices it was suggested >> to use kstat_irqs() to get the number of interrupts. >> Since tpm_tis can be built as a module it needs kstat_irqs >> exported. > > I'm not really enthused about exporting this without making it at least > safe. Using it from an interrupt handler is obviously safe vs. concurrent > removal, but the next driver writer who thinks this is cool is going to > get it wrong for sure. > > Though I still have to figure out what the advantage of invoking a > function which needs to do a radix tree lookup over a device local > counter is just to keep track of this. > > I'll reply on the TPM part of this as well. > > Thanks, > > tglx I can rework it to use a device local counter. _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx