The patch titled
Subject: kernel/time/hrtimer.c: restart_syscall: use freezable blocking call
has been removed from the -mm tree. Its filename was
restart_syscall-use-freezable-blocking-call.patch
This patch was dropped because it had testing failures
------------------------------------------------------
From: Maninder Singh <maninder1.s@xxxxxxxxxxx>
Subject: kernel/time/hrtimer.c: restart_syscall: use freezable blocking call
Avoid waking up every thread sleeping in a restart_syscall call during
suspend and resume by calling a freezable blocking call. Previous patches
modified the freezer to avoid sending wakeups to threads that are blocked
in freezable blocking calls.
Ref: https://lkml.org/lkml/2013/5/1/424
Backtrace:
[<c03e3924>] (__schedule+0x0/0x5d8) from [<c03e3f88>] (schedule+0x8c/0x90)
[<c03e3efc>] (schedule+0x0/0x90) from [<c03e3150>] (schedule_hrtimeout_range_clock+0xdc/0x110)
[<c03e3074>] (schedule_hrtimeout_range_clock+0x0/0x110) from [<c03e31a0>] (schedule_hrtimeout_range+0x1c/0x20)
r9:d16c9be0 r8:8b7d9c2c r7:00000000 r6:00000000 r5:d16c8028
[<c03e3184>] (schedule_hrtimeout_range+0x0/0x20) from [<c015778c>] (poll_schedule_timeout+0x48/0x6c)
[<c0157744>] (poll_schedule_timeout+0x0/0x6c) from [<c0158994>] (do_sys_poll+0x2c8/0x378) r5:d16c9f78 r4:00000000
[<c01586cc>] (do_sys_poll+0x0/0x378) from [<c0158a84>] (do_restart_poll+0x40/0x5c)
[<c0158a44>] (do_restart_poll+0x0/0x5c) from [<c005710c>] (sys_restart_syscall+0x2c/0x30) r4:fffffe7a
[<c00570e0>] (sys_restart_syscall+0x0/0x30) from [<c001a180>] (ret_fast_syscall+0x0/0x48)
This call was selected to be converted to a freezable call because it
doesn't hold any locks or release any resources when interrupted that
might be needed by another freezing task or a kernel driver during
suspend, and is a common site where idle userspace tasks are blocked.
Signed-off-by: Yogesh Gaur <yn.gaur@xxxxxxxxxxx>
Signed-off-by: Maninder Singh <maninder1.s@xxxxxxxxxxx>
Signed-off-by: Amit Arora <amit.arora@xxxxxxxxxxx>
Reviewed-by : Ajeet Yadav <ajeet.y@xxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Sasha Levin <sasha.levin@xxxxxxxxxx>
Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/time/hrtimer.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN kernel/time/hrtimer.c~restart_syscall-use-freezable-blocking-call kernel/time/hrtimer.c
--- a/kernel/time/hrtimer.c~restart_syscall-use-freezable-blocking-call
+++ a/kernel/time/hrtimer.c
@@ -1767,7 +1767,7 @@ schedule_hrtimeout_range_clock(ktime_t *
* A NULL parameter means "infinite"
*/
if (!expires) {
- schedule();
+ freezable_schedule();
return -EINTR;
}
@@ -1781,7 +1781,7 @@ schedule_hrtimeout_range_clock(ktime_t *
t.task = NULL;
if (likely(t.task))
- schedule();
+ freezable_schedule();
hrtimer_cancel(&t.timer);
destroy_hrtimer_on_stack(&t.timer);
_
Patches currently in -mm which might be from maninder1.s@xxxxxxxxxxx are
msgrcv-use-freezable-blocking-call.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
