Marco suggested this goes "the upstream list" but didn't forward it or say what that list is... udev still goes to the hotplug list? ---------- Forwarded Message ---------- Subject: udev problem (and fix) for lenny/armel Date: Thursday 20 November 2008 From: David Brownell <david-b@xxxxxxxxxxx> To: md@xxxxxxxx Hi, I have a machine running Debian and it's been getting nasty boot messages like: ... Synthesizing the initial hotplug events...done. Waiting for /dev to be fully populated...uncorrectable error : <3>end_request: I/O error, dev mtdblock0, sector 0 Buffer I/O error on device mtdblock0, logical block 0 uncorrectable error : <3>end_request: I/O error, dev mtdblock0, sector 8 Buffer I/O error on device mtdblock0, logical block 1 end_request: I/O error, dev mtdblock0, sector 16 Buffer I/O error on device mtdblock0, logical block 2 end_request: I/O error, dev mtdblock0, sector 24 Buffer I/O error on device mtdblock0, logical block 3 uncorrectable error : <3>end_request: I/O error, dev mtdblock0, sector 0 Buffer I/O error on device mtdblock0, logical block 0 done. Setting parameters of disc: (none). ... Where /dev/mtdblock0 is something of a special NAND partition, used by the mask ROM on the ARM to get a second stage loader, which is then loaded from /dev/mtdblock1 etc. The messages about "uncorrectable error" are from the kernel, since that first partition uses a different ECC scheme than the rest of the flash. What's happening is that it's trying to read partition data from the MTD devices ... which is inappropriate, they don't use internal partition data. And the mtdblock0 read fails, because of the ECC differences, producing messages ... ones that should never have appeared, since it shouldn't have been trying to read partition data. The boot is easily cleaned up by a patch to a udev rules file: /etc/udev/rules.d/60-persistent-storage.rules is already skipping a bunch of devices, it just needs to add the "mtd*" devices to what should be skipped: KERNEL=="ram*|loop*|fd*|mtd*|nbd*|gnbd*|dm-*|md*", GOTO="persistent_storage_end" It'd be good to see this bug fixed before lenny goes final... - Dave ------------------------------------------------------- -- To unsubscribe from this list: send the line "unsubscribe linux-hotplug" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
