Dear List, I am using a real-time 2.6.33.7 version on ARM and I have noticed some problems with the NAND. After a power cycle I see messages like "mtd->read( ) returned ECC Error." It is quite strange. Example: mtd->read(0x1fba0 bytes from 0x4e0460) returned ECC error mtd->read(0x1d520 bytes from 0x4e2ae0) returned ECC error Initially, I make write to the NAND the jff2 filesystem and when I boot for first time there are no ECC errors at all. After the first power cycler, some ECC errors will appear. If I do a second power cycle, more may be would appear. If I repeat again the same procedure, writing again the rootfile system to the NAND, after a power cycle the ECC errors will come from the same region (0x4exxxx). I have used different types of NAND, and the problem is the same. I think it might have to do with a combination of the RT and jffs2, Jffs2 garbage collector thread. The GC thread might need priority change as it takes the lock for performing the scan and may sleep for longer within the RT world. Therefore writes do not happen that often, therefore those ECC errors from un-flushed wbuf buffers. Have you seen similar behaviour before with RT and Jffs2? Thank you A -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
