Messages in this thread | | | From | Yong Zhang <> | Subject | [RFC V2 PATCH 0/3] timer: patchset focus on del_timer_sync() | Date | Wed, 25 Aug 2010 21:45:56 +0800 |
| |
From: Yong Zhang <yong.zhang@windriver.com>
This is inspired by http://lkml.org/lkml/2010/8/16/291 which catch a lockdep false positive on fake_timer_lock. When I go into del_timer_sync(), but don't find anything which prevent del_timer_sync() from using in softirq context, and indeed it's been used in softirq for some timer(such as __dst_free()).
Thus, tell others it can't be used in softirq context, and teach lockdep about that. It's realized by patch-0002.
Your comments are very appreciated.
Thanks, Yong
V2 <- V1 Update patch 0001, the new version make try_to_del_timer_sync() safe on both hardirq context and UP. Thanks Oleg.
--- Yong Zhang (3): timer: make try_to_del_timer_sync() safe on both hardirq context and UP timer: del_timer_sync() can be used in softirq context timer: warn when del_timer_sync() used in hardirq context
include/linux/timer.h | 4 ++-- kernel/timer.c | 20 +++++++++----------- 2 files changed, 11 insertions(+), 13 deletions(-)
| |