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@xxxxxxx> > Komu: azurIt <azurit@xxxxxxxx> > DÃtum: 15.04.2011 13:17 > Predmet: Re: Regression from 2.6.36 > > CC: "Andrew Morton" <akpm@xxxxxxxxxxxxxxxxxxxx>, "Eric Dumazet" <eric.dumazet@xxxxxxxxx>, "Changli Gao" <xiaosuo@xxxxxxxxx>, "Am?rico Wang" <xiyou.wangcong@xxxxxxxxx>, "Jiri Slaby" <jslaby@xxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, "Jiri Slaby" <jirislaby@xxxxxxxxx> >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 > >-- >To unsubscribe from this list: send the line "unsubscribe linux-kernel" in >the body of a message to majordomo@xxxxxxxxxxxxxxx >More majordomo info at http://vger.kernel.org/majordomo-info.html >Please read the FAQ at http://www.tux.org/lkml/ > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>