lkml.org 
[lkml]   [2005]   [Jul]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Memory Management

Neil Horman wrote:

>On Sun, Jul 24, 2005 at 10:40:19PM -0300, Márcio Oliveira wrote:
>
>
>>Neil Horman wrote:
>>
>>
>>
>>>On Sat, Jul 23, 2005 at 08:16:20PM -0300, Márcio Oliveira wrote:
>>>
>>>
>>>
>>>
>>>>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.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>I honestly don't know. I expect you haven't patched something correctly,
>>>have
>>>you built the source tree with rpmbuild, or are you just extracting the
>>>tar file
>>>
>>>
>>>from the rpm?
>>
>>
>>>Neil
>>>
>>>
>>>
>>>
>>>
>I honestly have no idea. Suffice it to say, I never build out of the
>kernel-source package. Better to use the kernel src rpm, do an rpmbuild -bp on
>the kernel src rpm, setting your target arch accordingly. I have no problems
>with that on any RHEL kernels.
>Neil
>
>
>
>> I'm using the kernel-source package and trying to compiling the
>>source (in /usr/src/linux-2.4 directory) with "make config", "make dep",
>>"make clean", "make bzImage", "make modules" and "make
>>modules_install". I also try to compile a RHEL3 kernel-source without
>>the sysrq-m changes on other RHEL3 systems and get the same errors...
>>
>> If I try to compile a kernel source provide by kernel.org, I don't
>>get the errors above, and the kernel compile works. When I try to
>>compile the RHEL3 kernel-source, the "make config", "make dep", "make
>>clean" and "make bzImage" commands works fine but when I run "make
>>modules" command I get the errors above. I think that is some issue with
>>the RHEL3 kernel-source package because other kernel sources (not Red
>>Hat kernel) compile without problems.
>>
>> I will try to compile the kernel using rpmbuild and check the
>>results, plus the slabinfo informations.
>>
>>Thanks again,
>>
>>Márcio.
>>
>>
>
>
>
Neil,

Can I increase the number of pages in Zone_NORMAL using RHEL 3
hugemem kernel?

Thanks.

Márcio.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-07-25 19:05    [W:0.052 / U:0.556 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site