linux-kernel - Re: Regression from 2.6.36

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Date:	Fri, 15 Apr 2011 13:36:44 +0200
From:	"azurIt" <azurit@...ox.sk>
To:	"Mel Gorman" <mgorman@...e.de>
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Eric Dumazet" <eric.dumazet@...il.com>,
	"Changli Gao" <xiaosuo@...il.com>,
	"Am?rico Wang" <xiyou.wangcong@...il.com>,
	"Jiri Slaby" <jslaby@...e.cz>, <linux-kernel@...r.kernel.org>,
	<linux-mm@...ck.org>, <linux-fsdevel@...r.kernel.org>,
	"Jiri Slaby" <jirislaby@...il.com>
Subject: Re: Regression from 2.6.36


sysfs was already mounted:

# mount
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)


I have enabled all of the options you suggested and also CONFIG_DEBUG_FS ;) I will boot new kernel this night. Hope it won't degraded performance much..


______________________________________________________________
> Od: "Mel Gorman" <mgorman@...e.de>
> Komu: azurIt <azurit@...ox.sk>
> Dátum: 15.04.2011 13:17
> Predmet: Re: Regression from 2.6.36
>
> CC: "Andrew Morton" <akpm@...ux-foundation.org>, "Eric Dumazet" <eric.dumazet@...il.com>, "Changli Gao" <xiaosuo@...il.com>, "Am?rico Wang" <xiyou.wangcong@...il.com>, "Jiri Slaby" <jslaby@...e.cz>, linux-kernel@...r.kernel.org, linux-mm@...ck.org, linux-fsdevel@...r.kernel.org, "Jiri Slaby" <jirislaby@...il.com>
>On Fri, 2011-04-15 at 12:56 +0200, azurIt wrote:
>> # mount -t debugfs none /sys/kernel/debug
>> mount: mount point /sys/kernel/debug does not exist
>> 
>> # mkdir /sys/kernel/debug
>> mkdir: cannot create directory `/sys/kernel/debug': No such file or directory
>> 
>
>Mount sysfs first
>
>mount -t sysfs none /sys
>
>> 
>> config file used for testing is here:
>> http://watchdog.sk/lkml/config
>> 
>
>Try setting the following
>
>CONFIG_TRACEPOINTS=y
>CONFIG_STACKTRACE=y
>CONFIG_USER_STACKTRACE_SUPPORT=y
>CONFIG_NOP_TRACER=y
>CONFIG_TRACER_MAX_TRACE=y
>CONFIG_FTRACE_NMI_ENTER=y
>CONFIG_CONTEXT_SWITCH_TRACER=y
>CONFIG_GENERIC_TRACER=y
>CONFIG_FTRACE=y
>CONFIG_FUNCTION_TRACER=y
>CONFIG_FUNCTION_GRAPH_TRACER=y
>CONFIG_IRQSOFF_TRACER=y
>CONFIG_SCHED_TRACER=y
>CONFIG_FTRACE_SYSCALLS=y
>CONFIG_STACK_TRACER=y
>CONFIG_BLK_DEV_IO_TRACE=y
>CONFIG_DYNAMIC_FTRACE=y
>CONFIG_FTRACE_MCOUNT_RECORD=y
>CONFIG_FTRACE_SELFTEST=y
>CONFIG_FTRACE_STARTUP_TEST=y
>CONFIG_MMIOTRACE=y
>CONFIG_HAVE_MMIOTRACE_SUPPORT=y
>
>-- 
>Mel Gorman
>SUSE Labs
>
>--
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