The patch titled
signals: microoptimize the usage of ->curr_target
has been removed from the -mm tree. Its filename was
signals-microoptimize-the-usage-of-curr_target.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: signals: microoptimize the usage of ->curr_target
From: Oleg Nesterov <oleg@xxxxxxxxxx>
Suggested by Roland McGrath.
Initialize signal->curr_target in copy_signal(). This way ->curr_target is
never == NULL, we can kill the check in __group_complete_signal's hot path.
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Roland McGrath <roland@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/fork.c | 2 +-
kernel/signal.c | 4 ----
2 files changed, 1 insertion(+), 5 deletions(-)
diff -puN kernel/fork.c~signals-microoptimize-the-usage-of-curr_target kernel/fork.c
--- a/kernel/fork.c~signals-microoptimize-the-usage-of-curr_target
+++ a/kernel/fork.c
@@ -892,7 +892,7 @@ static int copy_signal(unsigned long clo
sig->group_exit_code = 0;
sig->group_exit_task = NULL;
sig->group_stop_count = 0;
- sig->curr_target = NULL;
+ sig->curr_target = tsk;
init_sigpending(&sig->shared_pending);
INIT_LIST_HEAD(&sig->posix_timers);
diff -puN kernel/signal.c~signals-microoptimize-the-usage-of-curr_target kernel/signal.c
--- a/kernel/signal.c~signals-microoptimize-the-usage-of-curr_target
+++ a/kernel/signal.c
@@ -863,10 +863,6 @@ __group_complete_signal(int sig, struct
* Otherwise try to find a suitable thread.
*/
t = signal->curr_target;
- if (t == NULL)
- /* restart balancing at this thread */
- t = signal->curr_target = p;
-
while (!wants_signal(sig, t)) {
t = next_thread(t);
if (t == signal->curr_target)
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
origin.patch
posix-timers-bug-10460-discard-the-pending-signal-when-the-timer-is-destroyed.patch
workqueue-remove-redundant-function-invocation.patch
put_pid-make-sure-we-dont-free-the-live-pid.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
