Fixed
Created: Aug 30, 2015
Updated: Sep 8, 2018
Resolved Date: Aug 31, 2015
Found In Version: 7.0.0.8
Fix Version: 7.0.0.9
Severity: Severe
Applicable for: Wind River Linux 7
Component/s: BSP
Customer use WRlinux4.3 on P1020 board, they found if using flash_erase to erase a flash partition, hung task happens during the erase phase . After the flash erase operation complete, it becom normal.
The flash type is JS28F00AM29EWHE .
Their WRlinux4.3 using RCPL24.
The complete log is attached, here is some segment:
SMM ~ # flash_erase /dev/mtd1 0 0
Erasing 128 Kibyte @ 0 -- 0 % complete
Erasing 128 Kibyte @ 20000 -- 0 % complete
Erasing 128 Kibyte @ 40000 -- 0 % complete
......
Erasing 128 Kibyte @ 1340000 -- 60 % complete
Erasing 128 Kibyte @ 1360000 -- 60 % complete
Erasing 128 Kibyte @ 1380000 -- 60 % complete
Erasing 128 Kibyte @ 13a0000 -- 61 % complete INFO: task sh:727 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
sh D 0fe76ad0 0 727 711 0x00000000
locking:
df59142c &inode->i_mutex
Call Trace:
[df0cdc40] [00000002] 0x2 (unreliable)
[df0cdd00] [c0008974] __switch_to+0x64/0xd8
[df0cdd10] [c043f2e4] schedule+0x218/0x408
[df0cdd60] [c04401f4] __mutex_lock_slowpath+0xd0/0x174
[df0cdda0] [c044087c] mutex_lock+0x5c/0x60
[df0cddc0] [c00ff18c] do_truncate+0x60/0xa8
[df0cde10] [c010d1d0] do_last+0x5a0/0x6d0
[df0cde40] [c010f778] do_filp_open+0x1d4/0x5e8
[df0cdf20] [c00fe0d0] do_sys_open+0x64/0x19c
[df0cdf40] [c0010d04] ret_from_syscall+0x0/0x4
--- Exception: c01 at 0xfe76ad0
LR = 0xffd3ae8
......
sh D 0fe77068 0 607 590 0x00000000
locked:
df59142c &inode->i_mutex 0 [<c00c1ac0>] generic_file_aio_write+0x5c/0xf0
df9eb82c &c->alloc_sem 0 [<c01f9054>] jffs2_reserve_space+0x40/0x31c
df591380 &f->sem 0 [<c01fceb0>] jffs2_write_inode_range+0x5c/0x514
Call Trace:
[dbca98e0] [c009ad4c] rcu_process_callbacks+0x38/0x4c (unreliable)
[dbca99a0] [c0008974] __switch_to+0x64/0xd8
[dbca99b0] [c043f2e4] schedule+0x218/0x408
[dbca9a00] [c034bfa4] cfi_amdstd_write_words+0x364/0x480
[dbca9a80] [c034c9b4] cfi_amdstd_write_buffers+0x8f4/0xca8
[dbca9b10] [c03437ac] part_write+0xb0/0xe4
[dbca9b20] [c02051f8] jffs2_flash_direct_writev+0xdc/0x140
[dbca9b70] [c02079ac] jffs2_flash_writev+0x38c/0x4fc
[dbca9bc0] [c01fc6ac] jffs2_write_dnode+0x140/0x5bc
[dbca9c40] [c01fd0dc] jffs2_write_inode_range+0x288/0x514
[dbca9cd0] [c01f5ed4] jffs2_write_end+0x190/0x37c
[dbca9d10] [c00bf2f0] generic_file_buffered_write+0x100/0x26c
[dbca9da0] [c00c1828] __generic_file_aio_write+0x2c0/0x4fc
[dbca9e10] [c00c1ad4] generic_file_aio_write+0x70/0xf0
[dbca9e40] [c0100398] do_sync_write+0xac/0x120
[dbca9ee0] [c0101088] vfs_write+0xb4/0x184
[dbca9f00] [c01012cc] sys_write+0x50/0x10c
[dbca9f40] [c0010d04] ret_from_syscall+0x0/0x4
--- Exception: c01 at 0xfe77068
LR = 0xffd3c8c
......
sh D 0fe76ad0 0 727 711 0x00000000
locking:
df59142c &inode->i_mutex
Call Trace:
[df0cdc40] [00000002] 0x2 (unreliable)
[df0cdd00] [c0008974] __switch_to+0x64/0xd8
[df0cdd10] [c043f2e4] schedule+0x218/0x408
[df0cdd60] [c04401f4] __mutex_lock_slowpath+0xd0/0x174
[df0cdda0] [c044087c] mutex_lock+0x5c/0x60
[df0cddc0] [c00ff18c] do_truncate+0x60/0xa8
[df0cde10] [c010d1d0] do_last+0x5a0/0x6d0
[df0cde40] [c010f778] do_filp_open+0x1d4/0x5e8
[df0cdf20] [c00fe0d0] do_sys_open+0x64/0x19c
[df0cdf40] [c0010d04] ret_from_syscall+0x0/0x4
--- Exception: c01 at 0xfe76ad0
LR = 0xffd3ae8
flash_erase R running 0 869 32566 0x00000000
Call Trace:
[dbc6dae0] [c0017ac0] kunmap_atomic+0x14/0x3c (unreliable)
[dbc6dba0] [c0008974] __switch_to+0x64/0xd8
[dbc6dbb0] [c043f2e4] schedule+0x218/0x408
[dbc6dc00] [c043fbe4] schedule_timeout+0x170/0x2cc
[dbc6dc50] [c00531f0] msleep+0x1c/0x34
[dbc6dc60] [c034d538] do_erase_oneblock+0x7d0/0x944
[dbc6dcd0] [c0349dfc] cfi_varsize_frob+0x1a8/0x2cc
[dbc6dd20] [c034e4d4] cfi_amdstd_erase_varsize+0x30/0x60
[dbc6dd30] [c0343abc] part_erase+0x80/0x104
[dbc6dd40] [c0345c80] mtd_ioctl+0x3e0/0xc3c
[dbc6de80] [c0111050] vfs_ioctl+0xcc/0xe4
[dbc6dea0] [c011122c] do_vfs_ioctl+0x80/0x770
[dbc6df10] [c01119b0] sys_ioctl+0x94/0x108
[dbc6df40] [c0010d04] ret_from_syscall+0x0/0x4
--- Exception: c01 at 0xff586a0
LR = 0xff58608
1. customer configure their project by the following options:
configure --enable-os=wr4.3 --enable-arch=ppcp1012 --enable-board=fsl_p2020 --with-kernel=standard --with-rootfs=glibc_small --with-wrinstdir=/opt/WindRiver4.3 --with-gnutoolchain=true --with-rcpl-version=0024 --with-layer=wr4.3 --enable-jobs=4 --enable-parallel-pkgbuilds=4
2. On target, running applications that accessing(reading and writting) flash concurrently
2. Use flash_erase to erase a flash partition:
SMM ~ # flash_erase /dev/mtd1 0 0
Then hung task will happens, the log is attached.
