Adding back those who *need* to be copied. Please be more careful with your replies. As I said, those others are for your benefit, not for mine, as they are more likely going to be able to help you. Thanks for confirming that it is indeed a regression with 5.6 kernels. Over to the Adrian/Ulf/others now... On Wed, Apr 22, 2020 at 07:15:18AM -0400, alpha_one_x86 wrote: > Hi, > > On multiple hardware I had tested 4.20, 5.6.6, again 4.20, 5.6.6, again > 4.20. > > The problem is only with 5.6.6, never with 4.20 > > On 2020-04-22 07:10, Russell King - ARM Linux admin wrote: > > On Wed, Apr 22, 2020 at 07:00:11AM -0400, alpha_one_x86 wrote: > > > Hi, > > > > > > It's regression because on the kernel 4.20 all is working. > > PLEASE do not drop the Cc list. The Cc list is for YOUR benefit. > > > > You can't say that without going back and checking. > > > > SD cards are flash media, and they fail in weird and stupid ways. > > Flash media itself only has a limited number of write cycles before > > the memory irrevocerably fails. SD cards have firmware on them to > > manage the flash media to perform wear leveling. Firmware can be > > buggy and cause problems. I've had SD cards become completely > > inaccessible because of a firmware failure. > > > > So, after finding a problem on a later kernel with SD cards, you > > need to confirm the regression by checking whether the previously > > working kernel continues to behave correctly (indicating a kernel > > regression) or whether it behaves the same (indicating a failure of > > the SD card.) > > > > If you're not willing to do that, I'm afraid we will have to discount > > your bug report since it doesn't contain the information necessary to > > make a proper evaluation of what may be going on. > > > > > Cheers, > > > > > > On 2020-04-22 04:28, Russell King - ARM Linux admin wrote: > > > > On Wed, Apr 22, 2020 at 03:03:57AM -0400, alpha_one_x86 wrote: > > > > > Hi, > > > > > > > > > > On mcbin platform I have uSD problem, repported but no reply on linux kernel > > > > > bugzilla, https://bugzilla.kernel.org/show_bug.cgi?id=207083 > > > > > > > > > > Any idea what patch try? > > > > I think that's a question for the MMC people. > > > > > > > > If you go back to your working 4.20 kernel, does the problem go away? > > > > If so, it sounds like a regression in the MMC subsystem. If not, I > > > > wonder if it could be the uSD card going bad. > > > > > > > > However, I suspect the former. I've seen one instance here where a > > > > Clearfog GT8k (Armada 8040 based just like the mcbin) running 5.6 with > > > > the rootfs on eMMC completely lost the ability to talk to the eMMC to > > > > the point that the machine had to be power cycled to recover it - > > > > merely rebooting did not. I don't know the cause - the initial failure > > > > had vanished from the kernel logs, and because the eMMC was no longer > > > > accessible, the rsyslog files did not contain the details either. > > > > I've since setup remote logging, and I'm currently waiting for it to > > > > happen again. I couldn't say if _that_ is a regression because I > > > > haven't been using the GT8k until very recently, and I tend not to use > > > > eMMC/uSD on the Macchiatobin that runs 24x7. > > > > > > > -- > > > alpha_one_x86/BRULE Herman <alpha_one_x86@xxxxxxxxxxxxxxxx> > > > Main developer of Supercopier/Ultracopier/CatchChallenger, Esourcing and server management > > > IT, OS, technologies, research & development, security and business department > > > > -- > alpha_one_x86/BRULE Herman <alpha_one_x86@xxxxxxxxxxxxxxxx> > Main developer of Supercopier/Ultracopier/CatchChallenger, Esourcing and server management > IT, OS, technologies, research & development, security and business department > -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 10.2Mbps down 587kbps up
