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SubjectRe: regression: 100% io-wait with 2.6.24-rcX
Date
Am Sonntag, 13. Januar 2008 schrieb Fengguang Wu:

> No idea yet :-/ I'm afraid I have to trouble you again - the bug just
> refused to appear in my system. I prepared a kernel module for you to
> gather more information:

> make && insmod ext2-writeback-debug.ko && sleep 1s && rmmod
> ext2-writeback-debug dmesg > ext2-writeback-debug.dmesg

Unfortunately, I unable to compile the module:

make -C /lib/modules/2.6.24-rc7-ext2/build SUBDIRS=/export/src modules
make[1]: Entering directory `/export/src/linux-2.6.24-rc7'
CC [M] /export/src/ext2-writeback-debug.o
/export/src/ext2-writeback-debug.c:89: error: variable ‘my_kprobe’ has
initializer but incomplete type
/export/src/ext2-writeback-debug.c:90: error: unknown field ‘pre_handler’
specified in initializer
/export/src/ext2-writeback-debug.c:90: warning: excess elements in struct
initializer
/export/src/ext2-writeback-debug.c:90: warning: (near initialization
for ‘my_kprobe’)
/export/src/ext2-writeback-debug.c:91: error: unknown field ‘post_handler’
specified in initializer
/export/src/ext2-writeback-debug.c:91: warning: excess elements in struct
initializer
/export/src/ext2-writeback-debug.c:91: warning: (near initialization
for ‘my_kprobe’)
/export/src/ext2-writeback-debug.c:92: error: unknown field ‘symbol_name’
specified in initializer
/export/src/ext2-writeback-debug.c:93: warning: excess elements in struct
initializer
/export/src/ext2-writeback-debug.c:93: warning: (near initialization
for ‘my_kprobe’)
/export/src/ext2-writeback-debug.c:109: error:
variable ‘jprobe_ext2_writepage’ has initializer but incomplete type
/export/src/ext2-writeback-debug.c:110: error: unknown field ‘entry’ specified
in initializer
/export/src/ext2-writeback-debug.c:110: warning: excess elements in struct
initializer
/export/src/ext2-writeback-debug.c:110: warning: (near initialization
for ‘jprobe_ext2_writepage’)
/export/src/ext2-writeback-debug.c:111: error: unknown field ‘kp’ specified in
initializer
/export/src/ext2-writeback-debug.c:112: warning: excess elements in struct
initializer
/export/src/ext2-writeback-debug.c:112: warning: (near initialization
for ‘jprobe_ext2_writepage’)
/export/src/ext2-writeback-debug.c:124: error: variable ‘jprobe_requeue_io’
has initializer but incomplete type
/export/src/ext2-writeback-debug.c:125: error: unknown field ‘entry’ specified
in initializer
/export/src/ext2-writeback-debug.c:125: warning: excess elements in struct
initializer
/export/src/ext2-writeback-debug.c:125: warning: (near initialization
for ‘jprobe_requeue_io’)
/export/src/ext2-writeback-debug.c:126: error: unknown field ‘kp’ specified in
initializer
/export/src/ext2-writeback-debug.c:127: warning: excess elements in struct
initializer
/export/src/ext2-writeback-debug.c:127: warning: (near initialization
for ‘jprobe_requeue_io’)
/export/src/ext2-writeback-debug.c: In function ‘setup_kprobe’:
/export/src/ext2-writeback-debug.c:132: error: dereferencing pointer to
incomplete type
/export/src/ext2-writeback-debug.c: In function ‘setup_jprobe’:
/export/src/ext2-writeback-debug.c:139: error: dereferencing pointer to
incomplete type
make[2]: *** [/export/src/ext2-writeback-debug.o] Error 1
make[1]: *** [_module_/export/src] Error 2
make[1]: Leaving directory `/export/src/linux-2.6.24-rc7'
make: *** [default] Error 2

regards,
Jörg

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