linux/lib/Kconfig.debug, branch v2.6.21-rc7

[PATCH] fault injection: split up stacktrace filter Kconfig option

2007-02-21T01:10:14Z

There is no prompt for CONFIG_STACKTRACE, so FAULT_INJECTION cannot be selected without LOCKDEP enabled. (found by Paolo 'Blaisorblade' Giarrusso) In order to fix such broken Kconfig dependency, this patch splits up the stacktrace filter support for fault injection by new Kconfig option, which enables to use fault injection on the architecture which doesn't have general stacktrace support. Cc: "Paolo 'Blaisorblade' Giarrusso" Signed-off-by: Akinobu Mita Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] Add debugging feature /proc/timer_stat

2007-02-16T16:13:59Z

Add /proc/timer_stats support: debugging feature to profile timer expiration. Both the starting site, process/PID and the expiration function is captured. This allows the quick identification of timer event sources in a system. Sample output: # echo 1 > /proc/timer_stats # cat /proc/timer_stats Timer Stats Version: v0.1 Sample period: 4.010 s 24, 0 swapper hrtimer_stop_sched_tick (hrtimer_sched_tick) 11, 0 swapper sk_reset_timer (tcp_delack_timer) 6, 0 swapper hrtimer_stop_sched_tick (hrtimer_sched_tick) 2, 1 swapper queue_delayed_work_on (delayed_work_timer_fn) 17, 0 swapper hrtimer_restart_sched_tick (hrtimer_sched_tick) 2, 1 swapper queue_delayed_work_on (delayed_work_timer_fn) 4, 2050 pcscd do_nanosleep (hrtimer_wakeup) 5, 4179 sshd sk_reset_timer (tcp_write_timer) 4, 2248 yum-updatesd schedule_timeout (process_timeout) 18, 0 swapper hrtimer_restart_sched_tick (hrtimer_sched_tick) 3, 0 swapper sk_reset_timer (tcp_delack_timer) 1, 1 swapper neigh_table_init_no_netlink (neigh_periodic_timer) 2, 1 swapper e1000_up (e1000_watchdog) 1, 1 init schedule_timeout (process_timeout) 100 total events, 25.24 events/sec [ cleanups and hrtimers support from Thomas Gleixner ] [bunk@stusta.de: nr_entries can become static] Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner Cc: john stultz Cc: Roman Zippel Cc: Andi Kleen Signed-off-by: Adrian Bunk Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] Debug shared irqs

2007-02-12T17:48:28Z

Drivers registering IRQ handlers with SA_SHIRQ really ought to be able to handle an interrupt happening before request_irq() returns. They also ought to be able to handle an interrupt happening during the start of their call to free_irq(). Let's test that hypothesis.... [bunk@stusta.de: Kconfig fixes] Signed-off-by: David Woodhouse Cc: Arjan van de Ven Signed-off-by: Jesper Juhl Signed-off-by: Ingo Molnar Signed-off-by: Adrian Bunk Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] Remove references to obsolete kernel config option DEBUG_RWSEMS

2007-02-11T19:18:06Z

Remove the few references to the obsolete kernel config option DEBUG_RWSEMS. Signed-off-by: Robert P. J. Day Cc: Ingo Molnar Cc: David Howells Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Remove stack unwinder for now

2006-12-15T16:47:51Z

It has caused more problems than it ever really solved, and is apparently not getting cleaned up and fixed. We can put it back when it's stable and isn't likely to make warning or bug events worse. In the meantime, enable frame pointers for more readable stack traces. Signed-off-by: Linus Torvalds

Fix typo in new debug options.

2006-12-12T19:16:36Z

Signed-off-by: Dave Jones Signed-off-by: Adrian Bunk

[PATCH] Kconfig refactoring for better menu nesting

2006-12-10T17:55:39Z

Refactor Kconfig content to maximize nesting of menus by menuconfig and xconfig. Tested by simultaneously running `make xconfig` with and without patch, and comparing displays. Signed-off-by: Don Mullis Signed-off-by: Randy Dunlap Cc: Sam Ravnborg Cc: Roman Zippel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] fault-injection: stacktrace filtering kconfig fix

2006-12-08T16:29:03Z

`select' doesn't work very well. With alpha `make allmodconfig' we end up with CONFIG_STACKTRACE enabled, so we end up with undefined save_stacktrace() at link time. Cc: Akinobu Mita Cc: Don Mullis Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] fault-injection Kconfig cleanup

2006-12-08T16:29:03Z

- Fix some spelling and grammatical errors - Make the Kconfig menu more conventional. First you select fault-injection, then under that you select particular clients of it. Cc: Akinobu Mita Cc: Don Mullis Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] fault injection: stacktrace filtering

2006-12-08T16:29:03Z

This patch provides stacktrace filtering feature. The stacktrace filter allows failing only for the caller you are interested in. For example someone may want to inject kmalloc() failures into only e100 module. they want to inject not only direct kmalloc() call, but also indirect allocation, too. - e100_poll --> netif_receive_skb --> packet_rcv_spkt --> skb_clone --> kmem_cache_alloc This patch enables to detect function calls like this by stacktrace and inject failures. The script Documentaion/fault-injection/failmodule.sh helps it. The range of text section of loaded e100 is expected to be [/sys/module/e100/sections/.text, /sys/module/e100/sections/.exit.text) So failmodule.sh stores these values into /debug/failslab/address-start and /debug/failslab/address-end. The maximum stacktrace depth is specified by /debug/failslab/stacktrace-depth. Please see the example that demonstrates how to inject slab allocation failures only for a specific module in Documentation/fault-injection/fault-injection.txt [dwm@meer.net: reject failure if any caller lies within specified range] Signed-off-by: Akinobu Mita Signed-off-by: Don Mullis Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds