linux-kernel - Re: [PATCH] fix granularity of task

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 12 Nov 2009 09:00:25 +0900
From:	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>
To:	Stanislaw Gruszka <sgruszka@...hat.com>
CC:	Peter Zijlstra <peterz@...radead.org>,
	Spencer Candland <spencer@...ehost.com>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Oleg Nesterov <oleg@...hat.com>
Subject: Re: [PATCH] fix granularity of task_u/stime()

Stanislaw Gruszka wrote:
> On Tue, Nov 10, 2009 at 02:47:34PM +0900, Hidetoshi Seto wrote:
>> Remove casting to clock_t from task_u/stime(), and keep granularity of
>> cputime_t over the calculation.
>>
>> Signed-off-by: Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>
>> ---
>>  kernel/sched.c |   21 ++++++++++++---------
>>  1 files changed, 12 insertions(+), 9 deletions(-)
>>
>> diff --git a/kernel/sched.c b/kernel/sched.c
>> index 28dd4f4..1632e82 100644
>> --- a/kernel/sched.c
>> +++ b/kernel/sched.c
>> @@ -5171,41 +5171,44 @@ cputime_t task_stime(struct task_struct *p)
>>  	return p->stime;
>>  }
>>  #else
>> +
>> +#ifndef nsecs_to_cputime
>> +# define nsecs_to_cputime(__nsecs) msecs_to_cputime((__nsecs) / NSEC_PER_MSEC)
>> +#endif
>> +
> 
> I would like to test, but unfortunately with the patch kernel not build
> on my system:
> 
> kernel/built-in.o: In function `task_utime':
> /usr/src/rhel5/linux-2.6/kernel/sched.c:5187: undefined reference to
> `__udivdi3'
> kernel/built-in.o: In function `task_stime':
> /usr/src/rhel5/linux-2.6/kernel/sched.c:5208: undefined reference to
> `__udivdi3'
> make: *** [.tmp_vmlinux1] Error 1

Wow, what arch?
Could you provide your .config?


Thanks,
H.Seto

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