The patch titled
S390 topology: don't use kthread() for arch_reinit_sched_domains()
has been removed from the -mm tree. Its filename was
s390-topology-dont-use-kthread-for-arch_reinit_sched_domains.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: S390 topology: don't use kthread() for arch_reinit_sched_domains()
From: Oleg Nesterov <oleg@xxxxxxxxxx>
Now that it is safe to use get_online_cpus() we can revert
[S390] cpu topology: Fix possible deadlock.
commit: fd781fa25c9e9c6fd1599df060b05e7c4ad724e5
and call arch_reinit_sched_domains() directly from topology_work_fn().
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Gautham R Shenoy <ego@xxxxxxxxxx>
Tested-by: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: Max Krasnyansky <maxk@xxxxxxxxxxxx>
Cc: Paul Jackson <pj@xxxxxxx>
Cc: Paul Menage <menage@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Vegard Nossum <vegard.nossum@xxxxxxxxx>
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/s390/kernel/topology.c | 14 +-------------
1 file changed, 1 insertion(+), 13 deletions(-)
diff -puN arch/s390/kernel/topology.c~s390-topology-dont-use-kthread-for-arch_reinit_sched_domains arch/s390/kernel/topology.c
--- a/arch/s390/kernel/topology.c~s390-topology-dont-use-kthread-for-arch_reinit_sched_domains
+++ a/arch/s390/kernel/topology.c
@@ -9,7 +9,6 @@
#include <linux/device.h>
#include <linux/bootmem.h>
#include <linux/sched.h>
-#include <linux/kthread.h>
#include <linux/workqueue.h>
#include <linux/cpu.h>
#include <linux/smp.h>
@@ -230,20 +229,9 @@ void arch_update_cpu_topology(void)
}
}
-static int topology_kthread(void *data)
-{
- arch_reinit_sched_domains();
- return 0;
-}
-
static void topology_work_fn(struct work_struct *work)
{
- /* We can't call arch_reinit_sched_domains() from a multi-threaded
- * workqueue context since it may deadlock in case of cpu hotplug.
- * So we have to create a kernel thread in order to call
- * arch_reinit_sched_domains().
- */
- kthread_run(topology_kthread, NULL, "topology_update");
+ arch_reinit_sched_domains();
}
void topology_schedule_update(void)
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
origin.patch
linux-next.patch
migrate_timers-add-comment-use-spinlock_irq.patch
tracehook-add-linux-tracehookh.patch
tracehook-exec.patch
tracehook-unexport-ptrace_notify.patch
tracehook-exit.patch
tracehook-clone.patch
tracehook-vfork-done.patch
tracehook-release_task.patch
tracehook-tracehook_tracer_task.patch
tracehook-tracehook_expect_breakpoints.patch
tracehook-tracehook_signal_handler.patch
tracehook-tracehook_consider_ignored_signal.patch
tracehook-tracehook_consider_fatal_signal.patch
tracehook-syscall.patch
tracehook-get_signal_to_deliver.patch
tracehook-job-control.patch
tracehook-death.patch
tracehook-force-signal_pending.patch
tracehook-tif_notify_resume.patch
tracehook-asm-syscallh.patch
tracehook-config_have_arch_tracehook.patch
tracehook-wait_task_inactive.patch
task_current_syscall.patch
proc-pid-syscall.patch
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