From mboxrd@z Thu Jan 1 00:00:00 1970 From: Subject: Patch "sched/deadline: Change sched_getparam() behaviour vs SCHED_DEADLINE" has been added to the 3.14-stable tree Date: Mon, 09 Jun 2014 12:14:41 -0700 Message-ID: <14023412812007@kroah.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Return-path: Sender: stable-owner@vger.kernel.org To: peterz@infradead.org, gregkh@linuxfoundation.org, juri.lelli@gmail.com, linux-man@vger.kernel.org, mingo@kernel.org, mtk.manpages@gmail.com, raistlin@linux.it, torvalds@linux-foundation.org Cc: stable@vger.kernel.org, stable-commits@vger.kernel.org List-Id: linux-man@vger.kernel.org This is a note to let you know that I've just added the patch titled sched/deadline: Change sched_getparam() behaviour vs SCHED_DEADLINE to the 3.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: sched-deadline-change-sched_getparam-behaviour-vs-sched_deadline.patch and it can be found in the queue-3.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From ce5f7f8200ca2504f6f290044393d73ca314965a Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Mon, 12 May 2014 22:50:34 +0200 Subject: sched/deadline: Change sched_getparam() behaviour vs SCHED_DEADLINE From: Peter Zijlstra commit ce5f7f8200ca2504f6f290044393d73ca314965a upstream. The way we read POSIX one should only call sched_getparam() when sched_getscheduler() returns either SCHED_FIFO or SCHED_RR. Given that we currently return sched_param::sched_priority=0 for all others, extend the same behaviour to SCHED_DEADLINE. Requested-by: Michael Kerrisk Signed-off-by: Peter Zijlstra Acked-by: Michael Kerrisk Cc: Dario Faggioli Cc: linux-man Cc: "Michael Kerrisk (man-pages)" Cc: Juri Lelli Cc: Linus Torvalds Link: http://lkml.kernel.org/r/20140512205034.GH13467@laptop.programming.kicks-ass.net Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- kernel/sched/core.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3735,7 +3735,7 @@ SYSCALL_DEFINE1(sched_getscheduler, pid_ */ SYSCALL_DEFINE2(sched_getparam, pid_t, pid, struct sched_param __user *, param) { - struct sched_param lp; + struct sched_param lp = { .sched_priority = 0 }; struct task_struct *p; int retval; @@ -3752,11 +3752,8 @@ SYSCALL_DEFINE2(sched_getparam, pid_t, p if (retval) goto out_unlock; - if (task_has_dl_policy(p)) { - retval = -EINVAL; - goto out_unlock; - } - lp.sched_priority = p->rt_priority; + if (task_has_rt_policy(p)) + lp.sched_priority = p->rt_priority; rcu_read_unlock(); /* Patches currently in stable-queue which might be from peterz@infradead.org are queue-3.14/sched-deadline-fix-memory-leak.patch queue-3.14/sched-use-cpupri_nr_priorities-instead-of-max_rt_prio-in-cpupri-check.patch queue-3.14/perf-prevent-false-warning-in-perf_swevent_add.patch queue-3.14/sched-dl-fix-race-in-dl_task_timer.patch queue-3.14/perf-fix-race-in-removing-an-event.patch queue-3.14/sched-fix-hotplug-vs.-set_cpus_allowed_ptr.patch queue-3.14/sched-deadline-restrict-user-params-max-value-to-2-63-ns.patch queue-3.14/sched-make-sched_setattr-correctly-return-efbig.patch queue-3.14/perf-limit-perf_event_attr-sample_period-to-63-bits.patch queue-3.14/sched-disallow-sched_attr-sched_policy-0.patch queue-3.14/sched-deadline-change-sched_getparam-behaviour-vs-sched_deadline.patch queue-3.14/sched-sanitize-irq-accounting-madness.patch