The patch titled kthreads: move sched-realeted initialization from kthreadd context has been removed from the -mm tree. Its filename was kthreads-move-sched-realeted-initialization-from-kthreadd-context.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: kthreads: move sched-realeted initialization from kthreadd context From: Oleg Nesterov <oleg@xxxxxxxxxx> kthreadd is the single thread which implements ths "create" request, move sched_setscheduler/etc from create_kthread() to kthread_create() to improve the scalability. We should be careful with sched_setscheduler(), use _nochek helper. Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx> Cc: Christoph Hellwig <hch@xxxxxx> Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxx> Cc: Pavel Emelyanov <xemul@xxxxxxxxxx> Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx> Cc: Vitaliy Gusev <vgusev@xxxxxxxxxx Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- kernel/kthread.c | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) diff -puN kernel/kthread.c~kthreads-move-sched-realeted-initialization-from-kthreadd-context kernel/kthread.c --- a/kernel/kthread.c~kthreads-move-sched-realeted-initialization-from-kthreadd-context +++ a/kernel/kthread.c @@ -97,19 +97,10 @@ static void create_kthread(struct kthrea /* We want our own signal handler (we take no signals by default). */ pid = kernel_thread(kthread, create, CLONE_FS | CLONE_FILES | SIGCHLD); - if (pid < 0) { + if (pid < 0) create->result = ERR_PTR(pid); - } else { - struct sched_param param = { .sched_priority = 0 }; + else wait_for_completion(&create->started); - /* - * root may have changed our (kthreadd's) priority or CPU mask. - * The kernel thread should not inherit these properties. - */ - sched_setscheduler(create->result, SCHED_NORMAL, ¶m); - set_user_nice(create->result, KTHREAD_NICE_LEVEL); - set_cpus_allowed_ptr(create->result, cpu_all_mask); - } complete(&create->done); } @@ -152,11 +143,20 @@ struct task_struct *kthread_create(int ( wait_for_completion(&create.done); if (!IS_ERR(create.result)) { + struct sched_param param = { .sched_priority = 0 }; va_list args; + va_start(args, namefmt); vsnprintf(create.result->comm, sizeof(create.result->comm), namefmt, args); va_end(args); + /* + * root may have changed our (kthreadd's) priority or CPU mask. + * The kernel thread should not inherit these properties. + */ + sched_setscheduler_nocheck(create.result, SCHED_NORMAL, ¶m); + set_user_nice(create.result, KTHREAD_NICE_LEVEL); + set_cpus_allowed_ptr(create.result, cpu_all_mask); } return create.result; } _ Patches currently in -mm which might be from oleg@xxxxxxxxxx are origin.patch linux-next.patch pipe_rdwr_fasync-fix-the-error-handling-to-prevent-the-leak-crash.patch get_mm_hiwater_xxx-trivial-s-define-inline.patch getrusage-fill-ru_maxrss-value.patch do_wait-fix-waiting-for-the-group-stop-with-the-dead-leader.patch ptrace-kill-__ptrace_detach-fix-exit_state-check.patch ptrace-simplify-ptrace_exit-ignoring_children-path.patch ptrace-simplify-ptrace_exit-ignoring_children-pathpatch-fix.patch ptrace-reintroduce-__ptrace_detach-as-a-callee-of-ptrace_exit.patch ptrace-reintroduce-__ptrace_detach-as-a-callee-of-ptrace_exit-fix.patch ptrace-fix-possible-zombie-leak-on-ptrace_detach.patch reparent_thread-dont-call-kill_orphaned_pgrp-if-task_detached.patch reparent_thread-fix-the-is-it-traced-check.patch reparent_thread-fix-a-zombie-leak-if-sbin-init-ignores-sigchld.patch forget_original_parent-split-out-the-un-ptrace-part.patch forget_original_parent-do-not-abuse-child-ptrace_entry.patch forget_original_parent-do-not-abuse-child-ptrace_entry-fix.patch move-exit_ptrace-from-forget_original_parent-to-do_exit.patch reparent-untrace-do-nothing-if-no-childs-tracees.patch tracehook_notify_death-use-task_detached-helper.patch ptrace_detach-the-wrong-wakeup-breaks-the-erestartxxx-logic.patch ptrace_untrace-fix-the-signal_stop_stopped-check.patch workqueue-avoid-recursion-in-run_workqueue.patch kthreads-simplify-the-startup-synchronization.patch kthreads-rework-kthread_stop.patch kthreads-simplify-migration_thread-exit-path.patch pids-document-task_pgrp-task_session-is-not-safe-without-tasklist-rcu.patch pids-document-task_pgrp-task_session-is-not-safe-without-tasklist-rcu-fix.patch pids-improve-get_task_pid-to-fix-the-unsafe-sys_wait4-task_pgrp.patch pids-refactor-vnr-nr_ns-helpers-to-make-them-safe.patch pids-kill-now-unused-signal_struct-__pgrp-__session-and-friends.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