Re: SDHC card affected by preemption model in 2.6.35

2011-02-22 Thread Johannes Reif
Hi all, On 22.02.2011 02:43, Dave Hylands wrote: Hi guys, There is a bug in the kernel workqueues. I observed it in 2.6.36.3 (it seems to have been introduced in 2.6.36 and is still in 2.6.37.1), One of my colleagues was investigating and contacted the author of the workqueue code (Tejun

Re: SDHC card affected by preemption model in 2.6.35

2011-02-21 Thread Johannes Reif
Hello Venkat, Hello Mathieu, No. I was working on some other things lately. What card are you using and how often are you seeing this ? Regards, Venkat. We get the timeout Problem every time: [1.888732] Waiting for root device /dev/mmcblk0p2... [4.193603] mmc0: error -110 whilst

Re: SDHC card affected by preemption model in 2.6.35

2011-02-21 Thread Dave Hylands
Hi guys, On Mon, Feb 21, 2011 at 4:53 AM, Johannes Reif r...@corscience.de wrote: Hello Venkat, Hello Mathieu,  No. I was working on some other things lately. What card are you using and  how often are you seeing this ?  Regards,  Venkat. We get the timeout Problem every time: [    

Re: SDHC card affected by preemption model in 2.6.35

2011-02-20 Thread S, Venkatraman
On Sun, Feb 20, 2011 at 10:42 PM, S, Venkatraman svenk...@ti.com wrote: On Fri, Feb 18, 2011 at 6:27 PM, Thomas Weber we...@corscience.de wrote: Hello Mathieu, hello Venkat, I hope it is not too old and you remember this:   This provides a good 100ms window for delays due to scheduling

Re: SDHC card affected by preemption model in 2.6.35

2011-02-18 Thread Thomas Weber
Hello Mathieu, hello Venkat, I hope it is not too old and you remember this: Am 17.06.2010 16:33, schrieb Venkatraman S: Mathieu Poirier mathieu.poir...@canonical.com wrote: On Wed, 2010-06-16 at 14:13 +0530, Venkatraman S wrote: Mathieu Poirier mathieu.poir...@canonical.com wrote: On Tue,

Re: SDHC card affected by preemption model in 2.6.35

2010-06-17 Thread Venkatraman S
Mathieu Poirier mathieu.poir...@canonical.com wrote: On Wed, 2010-06-16 at 14:13 +0530, Venkatraman S wrote: Mathieu Poirier mathieu.poir...@canonical.com wrote: On Tue, 2010-06-15 at 20:58 +0530, Venkatraman S wrote: Mathieu Poirier mathieu.poir...@canonical.com wrote: HW: Beagleboard

Re: SDHC card affected by preemption model in 2.6.35

2010-06-16 Thread Venkatraman S
Mathieu Poirier mathieu.poir...@canonical.com wrote: On Tue, 2010-06-15 at 20:58 +0530, Venkatraman S wrote: Mathieu Poirier mathieu.poir...@canonical.com wrote: HW: Beagleboard rev. C2 and C4 Processor: OMAP3 Kernel: 2.6.35-rc2 Driver: mmci-omap-hs I am faced with an SDHC card

Re: SDHC card affected by preemption model in 2.6.35

2010-06-16 Thread Mathieu Poirier
On Wed, 2010-06-16 at 14:13 +0530, Venkatraman S wrote: Mathieu Poirier mathieu.poir...@canonical.com wrote: On Tue, 2010-06-15 at 20:58 +0530, Venkatraman S wrote: Mathieu Poirier mathieu.poir...@canonical.com wrote: HW: Beagleboard rev. C2 and C4 Processor: OMAP3 Kernel: 2.6.35-rc2

SDHC card affected by preemption model in 2.6.35

2010-06-15 Thread Mathieu Poirier
HW: Beagleboard rev. C2 and C4 Processor: OMAP3 Kernel: 2.6.35-rc2 Driver: mmci-omap-hs I am faced with an SDHC card problem on a beagleboard. Some cards cannot be initialized on startup while others work perfectly. I tracked the issue down to one single kernel config: PREEMPT_VOLUNTARY.

Re: SDHC card affected by preemption model in 2.6.35

2010-06-15 Thread Venkatraman S
Mathieu Poirier mathieu.poir...@canonical.com wrote: HW: Beagleboard rev. C2 and C4 Processor: OMAP3 Kernel: 2.6.35-rc2 Driver: mmci-omap-hs I am faced with an SDHC card problem on a beagleboard.  Some cards cannot be initialized on startup while others work perfectly.  I tracked the

Re: SDHC card affected by preemption model in 2.6.35

2010-06-15 Thread Mathieu Poirier
On Tue, 2010-06-15 at 20:58 +0530, Venkatraman S wrote: Mathieu Poirier mathieu.poir...@canonical.com wrote: HW: Beagleboard rev. C2 and C4 Processor: OMAP3 Kernel: 2.6.35-rc2 Driver: mmci-omap-hs I am faced with an SDHC card problem on a beagleboard. Some cards cannot be

Re: SDHC card affected by preemption model in 2.6.35

2010-06-15 Thread David Brownell
When going from PREEMPT_VOLUNTARY to PREEMPT_NONE the problem goes away. Have you found whether this is a problem with the OMAP HSMMC driver versus the MMC/SD framework code -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to

Re: SDHC card affected by preemption model in 2.6.35

2010-06-15 Thread Mathieu Poirier
On Tue, 2010-06-15 at 14:55 -0700, David Brownell wrote: When going from PREEMPT_VOLUNTARY to PREEMPT_NONE the problem goes away. Have you found whether this is a problem with the OMAP HSMMC driver versus the MMC/SD framework code Not yet - I'm in the code, investigating. -- To