Neil,
The best way I can think to do that is take a look at /proc/slabinfo. That will
likely give you a pointer to which area of code is eating up your memory.
OK. I will monitor the /proc/slabinfo file.
Based on the sysrq-m info you posted it looks like due to fragmentation the
largest chunk of memory you can allocate is 2MB (perhaps less depending on
address space availability). If you can build a test kernel to do a show_state
rather than a show_mem at the beginning of oom_kil, then you should be able to
tell who is trying to do an allocation that leads to kswapd calling
out_of_memory.
Neil, I'm trying to recompile the kernel source 2.4.21-32.0.1 and get
some error messages:
In file included from
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/prefetch.h:13,
from
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/list.h:6,
from
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/module.h:12,
from 3w-xxxx.c:172:
/usr/src/linux-2.4.21-32.0.1.EL/include/asm/processor.h:61: warning:
parameter names (without types) in function declaration
/usr/src/linux-2.4.21-32.0.1.EL/include/asm/processor.h:61: field
`loops_per_jiffy_R_ver_str' declared as a function
/usr/src/linux-2.4.21-32.0.1.EL/include/asm/processor.h:84: invalid
suffix on integer constant
/usr/src/linux-2.4.21-32.0.1.EL/include/asm/processor.h:84: syntax error
before numeric constant
/usr/src/linux-2.4.21-32.0.1.EL/include/asm/processor.h:84: warning:
function declaration isn't a prototype
/usr/src/linux-2.4.21-32.0.1.EL/include/asm/processor.h:269: invalid
suffix on integer constant
/usr/src/linux-2.4.21-32.0.1.EL/include/asm/processor.h:269: syntax
error before numeric constant
/usr/src/linux-2.4.21-32.0.1.EL/include/asm/processor.h:269: warning:
function declaration isn't a prototype
/usr/src/linux-2.4.21-32.0.1.EL/include/asm/processor.h:273: warning:
parameter names (without types) in function declaration
In file included from 3w-xxxx.c:172:
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/module.h:190: invalid
suffix on integer constant
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/module.h:190: syntax error
before numeric constant
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/module.h:190:
`inter_module_register_R_ver_str' declared as function returning a function
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/module.h:190: warning:
function declaration isn't a prototype
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/module.h:191: invalid
suffix on integer constant
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/module.h:191: syntax error
before numeric constant
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/module.h:191:
`inter_module_unregister_R_ver_str' declared as function returning a
function
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/module.h:191: warning:
function declaration isn't a prototype
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/module.h:192:
`inter_module_get_R_ver_str' declared as function returning a function
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/module.h:192: warning:
parameter names (without types) in function declaration
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/module.h:193:
`inter_module_get_request_R_ver_str' declared as function returning a
function
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/module.h:193: warning:
parameter names (without types) in function declaration
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/module.h:194: invalid
suffix on integer constant
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/module.h:194: syntax error
before numeric constant
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/module.h:194:
`inter_module_put_R_ver_str' declared as function returning a function
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/module.h:194: warning:
function declaration isn't a prototype
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/module.h:203:
`try_inc_mod_count_R_ver_str' declared as function returning a function
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/module.h:203: warning:
parameter names (without types) in function declaration
make[3]: *** [3w-xxxx_10200033.o] Error 1
make[3]: Leaving directory
`/usr/src/linux-2.4.21-32.0.1.EL/drivers/addon/3w-xxxx_10200033'
make[2]: *** [_modsubdir_3w-xxxx_10200033] Error 2
make[2]: Leaving directory `/usr/src/linux-2.4.21-32.0.1.EL/drivers/addon'
make[1]: *** [_modsubdir_addon] Error 2
make[1]: Leaving directory `/usr/src/linux-2.4.21-32.0.1.EL/drivers'
make: *** [_mod_drivers] Error 2
Is there any relationship between the sysrq-m changes to do show_state()
rather than a show_mem() and the compiling erros?
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/prefetch.h, line 13:
#include <asm/processor.h>
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/list.h ,line 6:
#include <linux/prefetch.h>
/usr/src/linux-2.4.21-32.0.1.EL/include/linux/module.h, line 12:
#include <linux/list.h>
3w-xxxx.c, line 172:
#include <linux/module.h>
Any ideia about the kernel compiling erros?
(If I try to recompile a kernel.org kernel, it is compiled fine).
Thanks again.
Márcio.
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