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| author | Joel Fernandes (Google) <joel@joelfernandes.org> | 2019-08-30 12:36:32 -0400 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2020-01-24 10:24:31 -0800 |
| commit | 77a40f97030b27b3fc1640a3ed203870f0817f57 (patch) | |
| tree | 5710fe4b845d8a0cf58e2906e82e1397f9261ecc /Documentation/RCU | |
| parent | e99637becb2e684bee2b9117f817f4d1346b8353 (diff) | |
| download | lwn-77a40f97030b27b3fc1640a3ed203870f0817f57.tar.gz lwn-77a40f97030b27b3fc1640a3ed203870f0817f57.zip | |
rcu: Remove kfree_rcu() special casing and lazy-callback handling
This commit removes kfree_rcu() special-casing and the lazy-callback
handling from Tree RCU. It moves some of this special casing to Tiny RCU,
the removal of which will be the subject of later commits.
This results in a nice negative delta.
Suggested-by: Paul E. McKenney <paulmck@linux.ibm.com>
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
[ paulmck: Add slab.h #include, thanks to kbuild test robot <lkp@intel.com>. ]
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'Documentation/RCU')
| -rw-r--r-- | Documentation/RCU/stallwarn.txt | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/Documentation/RCU/stallwarn.txt b/Documentation/RCU/stallwarn.txt index f48f4621ccbc..a360a8796710 100644 --- a/Documentation/RCU/stallwarn.txt +++ b/Documentation/RCU/stallwarn.txt @@ -225,18 +225,13 @@ an estimate of the total number of RCU callbacks queued across all CPUs In kernels with CONFIG_RCU_FAST_NO_HZ, more information is printed for each CPU: - 0: (64628 ticks this GP) idle=dd5/3fffffffffffffff/0 softirq=82/543 last_accelerate: a345/d342 Nonlazy posted: ..D + 0: (64628 ticks this GP) idle=dd5/3fffffffffffffff/0 softirq=82/543 last_accelerate: a345/d342 dyntick_enabled: 1 The "last_accelerate:" prints the low-order 16 bits (in hex) of the jiffies counter when this CPU last invoked rcu_try_advance_all_cbs() from rcu_needs_cpu() or last invoked rcu_accelerate_cbs() from -rcu_prepare_for_idle(). The "Nonlazy posted:" indicates lazy-callback -status, so that an "l" indicates that all callbacks were lazy at the start -of the last idle period and an "L" indicates that there are currently -no non-lazy callbacks (in both cases, "." is printed otherwise, as -shown above) and "D" indicates that dyntick-idle processing is enabled -("." is printed otherwise, for example, if disabled via the "nohz=" -kernel boot parameter). +rcu_prepare_for_idle(). "dyntick_enabled: 1" indicates that dyntick-idle +processing is enabled. If the grace period ends just as the stall warning starts printing, there will be a spurious stall-warning message, which will include |