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5648d65912
Currently rcu_check_gp_start_stall() complains if a grace period takes too long to start, where "too long" is roughly one RCU CPU stall-warning interval. This has worked well, but there are some debugging Kconfig options (such as CONFIG_EFI_PGT_DUMP=y) that can make booting take a very long time, so much so that the stall-warning interval has expired before RCU's grace-period kthread has even been spawned. This commit therefore resets the rcu_state.gp_req_activity and rcu_state.gp_activity timestamps just before the grace-period kthread is spawned, and modifies the checks and adds ordering to ensure that if rcu_check_gp_start_stall() sees that the grace-period kthread has been spawned, that it will also see the resets applied to the rcu_state.gp_req_activity and rcu_state.gp_activity timestamps. Reported-by: Qian Cai <cai@lca.pw> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> [ paulmck: Fix whitespace issues reported by Qian Cai. ] Tested-by: Qian Cai <cai@lca.pw> [ paulmck: Simplify grace-period wakeup check per Steve Rostedt feedback. ] |
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|---|---|---|
| .. | ||
| Kconfig | ||
| Kconfig.debug | ||
| Makefile | ||
| rcu_segcblist.c | ||
| rcu_segcblist.h | ||
| rcu.h | ||
| rcuperf.c | ||
| rcutorture.c | ||
| srcutiny.c | ||
| srcutree.c | ||
| sync.c | ||
| tiny.c | ||
| tree_exp.h | ||
| tree_plugin.h | ||
| tree_stall.h | ||
| tree.c | ||
| tree.h | ||
| update.c | ||