From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dirk Behme Subject: Re: CONFIG_PREEMPT_RT patch on Apollon (OMAP2) Date: Mon, 27 Nov 2006 20:09:54 +0100 Message-ID: <456B3802.1000101@gmail.com> References: <11115895.486281164610759448.JavaMail.weblogic@ep_ml20> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <11115895.486281164610759448.JavaMail.weblogic@ep_ml20> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-omap-open-source-bounces+gplao-linux-omap-open-source=gmane.org@linux.omap.com Errors-To: linux-omap-open-source-bounces+gplao-linux-omap-open-source=gmane.org@linux.omap.com To: kyungmin.park@samsung.com, OMAP List-Id: linux-omap@vger.kernel.org Kyungmin Park wrote: > As you mentioned, I tried to use CONFIG_PREEMPT_RT patch. Great! > But there's some issues. Yep, CONFIG_PREEMPT_RT still looks experimental on our platform. Hopefully we contribute to improvement by testing it. > 1. ethernet flags > - After change from IRQF_RISING to IRQF_HIGH in recent OMAP2 patch. it occurs the GPIO bug message in line 1005. > So I reverted IRQF_RISING as before. then it's working. Maybe David has an idea here? [1] Regarding ethernet I'm unsure. On OSK/OMAP1 my testcase is playing MP3 over NFS. While writing my previous mail, I never reached the end of MP3 because of NFS timeouts and connection losses. Today, I tried again to get the exact error message and now no NFS issues any more. MP3 properly finishes. > 2. Too many loads??? > - After booting. I think the system is too slow. and also it's unstable. After some opeartions. it's hang. Can't say this for OSK, feeling is same speed or even faster. For me, ALSA was unstable because I missed to convert some spinlocks to raw_spinlocks. Maybe you should check if you found all? What's your testcase? For which operations does it hang? > 3. ARMv6 support > - current cmpxchg support for under ARMv6 only. Don't know anything about ARMv6. Cheers Dirk [1] http://linux.omap.com/pipermail/linux-omap-open-source/2006-November/008270.html