Failure on MTD sub-page test

[Danesh Daroui]

Hello,

We are using UBIFS which is shipped with the Kernel 2.6.39.4 on a NAND Flash memory. When I run "mtd_debug info /dev/mtd0" following info are shown:

mtd.type = MTD_NANDFLASH
mtd.flags = MTD_CAP_NANDFLASH
mtd.size = 1073741824 (1G)
mtd.erasesize = 524288 (512K)
mtd.writesize = 4096 (4K)
mtd.oobsize = 128
regions = 0

Now the problem is that when I run mtd tests, only read and NAND ECC tests are passed. Then all other tests fail on exactly page 21. For instance this is the output when I run page test:

=================================================
mtd_subpagetest: MTD device: 0
mtd_subpagetest: MTD device size 1073741824, eraseblock size 524288, page size 4096, subpage size 1024, count of eraseblocks 2048, pages per eraseblock 128, OOB size 128
mtd_subpagetest: scanning for bad eraseblocks
mtd_subpagetest: scanned 2048 eraseblocks, 0 are bad
mtd_subpagetest: erasing whole device
mtd_subpagetest: erased 2048 eraseblocks
mtd_subpagetest: writing whole device
mtd_subpagetest: written up to eraseblock 0
mtd_subpagetest: written up to eraseblock 256
mtd_subpagetest: written up to eraseblock 512
mtd_subpagetest: written up to eraseblock 768
mtd_subpagetest: written up to eraseblock 1024
mtd_subpagetest: written up to eraseblock 1280
mtd_subpagetest: written up to eraseblock 1536
mtd_subpagetest: written up to eraseblock 1792
mtd_subpagetest: written 2048 eraseblocks
mtd_subpagetest: verifying all eraseblocks
mtd_subpagetest: verified up to eraseblock 0
mtd_subpagetest: verified up to eraseblock 256
mtd_subpagetest: verified up to eraseblock 512
mtd_subpagetest: verified up to eraseblock 768
mtd_subpagetest: verified up to eraseblock 1024
mtd_subpagetest: verified up to eraseblock 1280
mtd_subpagetest: verified up to eraseblock 1536
mtd_subpagetest: verified up to eraseblock 1792
mtd_subpagetest: verified 2048 eraseblocks
mtd_subpagetest: erasing whole device
mtd_subpagetest: erased 2048 eraseblocks
mtd_subpagetest: verifying all eraseblocks for 0xff
mtd_subpagetest: verified up to eraseblock 0
mtd_subpagetest: verified up to eraseblock 256
mtd_subpagetest: verified up to eraseblock 512
mtd_subpagetest: verified up to eraseblock 768
mtd_subpagetest: verified up to eraseblock 1024
mtd_subpagetest: verified up to eraseblock 1280
mtd_subpagetest: verified up to eraseblock 1536
mtd_subpagetest: verified up to eraseblock 1792
UBIFS error (pid 4243): ubifs_read_node: bad node type (255 but expected 1)
UBIFS error (pid 4243): ubifs_read_node: bad node at LEB 30:98088, LEB mapping status 1
UBIFS error (pid 4243): do_readpage: cannot read page 21 of inode 791, error -22


Signal 7 (BUS) caught by ps (procps version 3.2.8).
Please send bug reports to <feedback at lists.sf.net> or <albert at users.sf.net>
UBIFS error (pid 4245): ubifs_read_node: bad node type (255 but expected 9)
UBIFS error (pid 4245): ubifs_read_node: bad node at LEB 12:458808, LEB mapping status 1
UBIFS error (pid 4245): ubifs_iget: failed to read inode 1470, error -22
UBIFS error (pid 4245): ubifs_lookup: dead directory entry 'free', error -22
UBIFS error (pid 4246): ubifs_read_node: bad node type (255 but expected 9)
UBIFS error (pid 4246): ubifs_read_node: bad node at LEB 12:458808, LEB mapping status 1
UBIFS error (pid 4246): ubifs_iget: failed to read inode 1470, error -22
UBIFS error (pid 4246): ubifs_lookup: dead directory entry 'free', error -22
sh: free: Invalid argument
mtd_subpagetest: verified 2048 eraseblocks
mtd_subpagetest: writing whole device
mtd_subpagetest: written up to eraseblock 0
mtd_subpagetest: written up to eraseblock 256
mtd_subpagetest: written up to eraseblock 512
mtd_subpagetest: written up to eraseblock 768
mtd_subpagetest: written up to eraseblock 1024
mtd_subpagetest: written up to eraseblock 1280
mtd_subpagetest: written up to eraseblock 1536
mtd_subpagetest: written up to eraseblock 1792
mtd_subpagetest: written 2048 eraseblocks
mtd_subpagetest: verifying all eraseblocks
mtd_subpagetest: verified up to eraseblock 0
mtd_subpagetest: ECC correction at 0x300400
mtd_subpagetest: ECC correction at 0x3d80400
mtd_subpagetest: verified up to eraseblock 256
mtd_subpagetest: verified up to eraseblock 512
mtd_subpagetest: ECC correction at 0x13500000
mtd_subpagetest: verified up to eraseblock 768
mtd_subpagetest: verified up to eraseblock 1024
mtd_subpagetest: verified up to eraseblock 1280
mtd_subpagetest: verified up to eraseblock 1536
mtd_subpagetest: verified up to eraseblock 1792
mtd_subpagetest: ECC correction at 0x3ba00400
mtd_subpagetest: verified 2048 eraseblocks
mtd_subpagetest: erasing whole device
mtd_subpagetest: erased 2048 eraseblocks
mtd_subpagetest: verifying all eraseblocks for 0xff
mtd_subpagetest: verified up to eraseblock 0
mtd_subpagetest: verified up to eraseblock 256
mtd_subpagetest: verified up to eraseblock 512
mtd_subpagetest: verified up to eraseblock 768
UBIFS error (pid 4572): ubifs_read_node: bad node type (255 but expected 1)
UBIFS error (pid 4572): ubifs_read_node: bad node at LEB 30:98088, LEB mapping status 1
UBIFS error (pid 4572): do_readpage: cannot read page 21 of inode 791, error -22


Signal 7 (BUS) caught by ps (procps version 3.2.8).
Please send bug reports to <feedback at lists.sf.net> or <albert at users.sf.net>
UBIFS error (pid 4576): ubifs_read_node: bad node type (255 but expected 9)
UBIFS error (pid 4576): ubifs_read_node: bad node at LEB 12:458808, LEB mapping status 1
UBIFS error (pid 4576): ubifs_iget: failed to read inode 1470, error -22
UBIFS error (pid 4576): ubifs_lookup: dead directory entry 'free', error -22
UBIFS error (pid 4581): ubifs_read_node: bad node type (255 but expected 9)
UBIFS error (pid 4581): ubifs_read_node: bad node at LEB 12:458808, LEB mapping status 1
UBIFS error (pid 4581): ubifs_iget: failed to read inode 1470, error -22
UBIFS error (pid 4581): ubifs_lookup: dead directory entry 'free', error -22
sh: free: Invalid argument

mtd_subpagetest: verified up to eraseblock 1024
mtd_subpagetest: verified up to eraseblock 1280
mtd_subpagetest: verified up to eraseblock 1536
mtd_subpagetest: verified up to eraseblock 1792
mtd_subpagetest: verified 2048 eraseblocks
mtd_subpagetest: finished with 0 errors
=================================================

Despite 0 errors reported at the end of the test, UBIFS error has happened at least twice during the test exactly at page 21. This even worse when I run page test where the test is interrupted with device boot in the middle of the test which prevents the test to be done, as the log shows:

=================================================
mtd_pagetest: MTD device: 0
mtd_pagetest: MTD device size 1073741824, eraseblock size 524288, page size 4096, count of eraseblocks 2048, pages per eraseblock 128, OOB size 128
mtd_pagetest: scanning for bad eraseblocks
mtd_pagetest: scanned 2048 eraseblocks, 0 are bad
mtd_pagetest: erasing whole device
mtd_pagetest: erased 2048 eraseblocks
mtd_pagetest: writing whole device
mtd_pagetest: written up to eraseblock 0
mtd_pagetest: written up to eraseblock 256
mtd_pagetest: written up to eraseblock 512
UBIFS error (pid 2404): ubifs_read_node: bad node type (255 but expected 1)
UBIFS error (pid 2404): ubifs_read_node: bad node at LEB 30:98088, LEB mapping status 1
UBIFS error (pid 2404): do_readpage: cannot read page 21 of inode 791, error -22
UBIFS error (pid 2404): ubifs_read_node: bad node type (255 but expected 1)
UBIFS error (pid 2404): ubifs_read_node: bad node at LEB 30:98088, LEB mapping status 1
UBIFS error (pid 2404): do_readpage: cannot read page 21 of inode 791, error -22


Signal 7 (BUS) caught by ps (procps version 3.2.8).
Please send bug reports to <feedback at lists.sf.net> or <albert at users.sf.net>
UBIFS error (pid 2406): ubifs_read_node: bad node type (255 but expected 9)
UBIFS error (pid 2406): ubifs_read_node: bad node at LEB 12:463712, LEB mapping status 1
UBIFS error (pid 2406): ubifs_iget: failed to read inode 1470, error -22
UBIFS error (pid 2406): ubifs_lookup: dead directory entry 'free', error -22
UBIFS warning (pid 2406): ubifs_ro_mode: switched to read-only mode, error -22
UBIFS error (pid 2407): ubifs_read_node: bad node type (255 but expected 9)
UBIFS error (pid 2407): ubifs_read_node: bad node at LEB 12:463712, LEB mapping status 1
UBIFS error (pid 2407): ubifs_iget: failed to read inode 1470, error -22
UBIFS error (pid 2407): ubifs_lookup: dead directory entry 'free', error -22
sh: free: Invalid argument
mtd_pagetest: written up to eraseblock 768
mtd_pagetest: written up to eraseblock 1024
mtd_pagetest: written up to eraseblock 1280
mtd_pagetest: written up to eraseblock 1536
mtd_pagetest: written up to eraseblock 1792
mtd_pagetest: written 2048 eraseblocks
mtd_pagetest: verifying all eraseblocks
mtd_pagetest: verified up to eraseblock 0
RomBOOT

Since we are using a quite old and outdated kernel version i.e. 2.6.39.4, I am wondering whether a kernel update would fix this problem or not. Because kernel update is a quite big task due to incompatibilities that might happen, then we would prefer to know if the source of the problem is detectable and if there is any patch that we can use to pass all the tests with the current kernel or if we can use the latest version of UIFS without updating the kernel.

Sincerely,

Danesh Daroui