Hali, Egy ARM-os gepen futottam bele egy kernelhibaba (2.6.22). Egy soros dataflash-bol bootol, igy nez ki a /proc/mtd:
dev: size erasesize name mtd0: 00028380 00000210 "bootloader" mtd1: 001e8d00 00000210 "kernel" mtd2: 0020ef80 00000210 "filesystem" mtd3: 00210000 00004000 "NAND Partition 1" mtd4: 03df0000 00004000 "NAND Partition 2" A hibat ugy tudom elohozni, hogy bemountolom a /dev/mtdblock2-t (ez egy 2 megas minix), es vagy varok 10 masodpercet, vagy nyomok egy sync parancsot, es azonnal jon a register dump: kernel BUG at arch/arm/mm/consistent.c:488! Unable to handle kernel NULL pointer dereference at virtual address 00000000 pgd = c0004000 [00000000] *pgd=00000000 Internal error: Oops: 817 [#1] Modules linked in: CPU: 0 Not tainted (2.6.22 #8) PC is at __bug+0x20/0x2c ... Backtrace: [<c00289f8>] (__bug+0x0/0x2c) from [<c00297e4>] (consistent_sync+0xa4/0xb0) [<c0029740>] (consistent_sync+0x0/0xb0) from [<c0134e04>] (spi_transfer+0x100/0x1c0) [<c0134d04>] (spi_transfer+0x0/0x1c0) from [<c0169138>] (do_spi_transfer+0x54/0x5c) [<c01690e4>] (do_spi_transfer+0x0/0x5c) from [<c01694c0>] (at91_dataflash_read+0xf8/0x120) [<c01693c8>] (at91_dataflash_read+0x0/0x120) from [<c0165364>] (part_read+0xa8/0xdc) [<c01652bc>] (part_read+0x0/0xdc) from [<c0168344>] (mtdblock_writesect+0x164/0x1d4) r6:00000210 r5:00000020 r4:c1d8c3a0 [<c01681e0>] (mtdblock_writesect+0x0/0x1d4) from [<c0167580>] (mtd_blktrans_thread+0x178/0x1f4) [<c0167408>] (mtd_blktrans_thread+0x0/0x1f4) from [<c004c0a4>] (kthread+0x54/0x7c) Ha read only-ra mountolom, akkor mukodik. Az mtdblock driver jol mukodik az mtd4-esen, es a dataflash is jol mukodik, ha nem blokkosan, hanem karakteresen irom/olvasom (a minix image-et is csak igy tudtam beleirni, mkfs-re azonnal elhasal mindig). Mit tegyek, hogy a backtrace beszedesebb legyen (azaz a C forraskod sorszamai is benne legyenek)? Talalkoztatok mar hasonloval? Koszi, BB _________________________________________________ linux lista - [email protected] http://mlf2.linux.rulez.org/mailman/listinfo/linux
