* [PATCH 1/2] sched/prio: Add two inline function named nice_to_rlimit() and rlimit_to_nice() in prio.h. @ 2014-05-08 9:33 Dongsheng Yang 2014-05-08 9:33 ` [PATCH 2/2] treewide: remove all open implementation of nice_to_rlimit()/rlimit_to_nice() Dongsheng Yang 2014-05-19 13:10 ` [tip:sched/core] sched/prio: Add two inline function named nice_to_rlimit() and rlimit_to_nice() in prio.h tip-bot for Dongsheng Yang 0 siblings, 2 replies; 8+ messages in thread From: Dongsheng Yang @ 2014-05-08 9:33 UTC (permalink / raw) To: mingo, peterz; +Cc: linux-kernel, Dongsheng Yang This patch add two inline functions named nice_to_rlimit() and rlimit_to_nice() in prio.h. They are handle the convertion between nice value [19,-20] and rlimit style value [1,40]. Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> --- include/linux/sched/prio.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/include/linux/sched/prio.h b/include/linux/sched/prio.h index ac32258..d9cf5a5 100644 --- a/include/linux/sched/prio.h +++ b/include/linux/sched/prio.h @@ -41,4 +41,20 @@ #define TASK_USER_PRIO(p) USER_PRIO((p)->static_prio) #define MAX_USER_PRIO (USER_PRIO(MAX_PRIO)) +/* + * Convert nice value [19,-20] to rlimit style value [1,40]. + */ +static inline long nice_to_rlimit(long nice) +{ + return (MAX_NICE - nice + 1); +} + +/* + * Convert rlimit style value [1,40] to nice value [-20, 19]. + */ +static inline long rlimit_to_nice(long prio) +{ + return (MAX_NICE - prio + 1); +} + #endif /* _SCHED_PRIO_H */ -- 1.8.2.1 ^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH 2/2] treewide: remove all open implementation of nice_to_rlimit()/rlimit_to_nice(). 2014-05-08 9:33 [PATCH 1/2] sched/prio: Add two inline function named nice_to_rlimit() and rlimit_to_nice() in prio.h Dongsheng Yang @ 2014-05-08 9:33 ` Dongsheng Yang 2014-05-08 14:34 ` Peter Zijlstra ` (2 more replies) 2014-05-19 13:10 ` [tip:sched/core] sched/prio: Add two inline function named nice_to_rlimit() and rlimit_to_nice() in prio.h tip-bot for Dongsheng Yang 1 sibling, 3 replies; 8+ messages in thread From: Dongsheng Yang @ 2014-05-08 9:33 UTC (permalink / raw) To: mingo, peterz; +Cc: linux-kernel, Dongsheng Yang As there are already two inline functions in prio.h to handle the convertiion between nice value and rlimit style value of priority, this patch remove all open implementation of these two functions. Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> --- drivers/staging/android/binder.c | 2 +- kernel/sched/core.c | 2 +- kernel/sys.c | 6 +++--- 3 files changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/staging/android/binder.c b/drivers/staging/android/binder.c index 179b21b..9311bb6 100644 --- a/drivers/staging/android/binder.c +++ b/drivers/staging/android/binder.c @@ -436,7 +436,7 @@ static void binder_set_nice(long nice) set_user_nice(current, nice); return; } - min_nice = 20 - current->signal->rlim[RLIMIT_NICE].rlim_cur; + min_nice = rlimit_to_nice(current->signal->rlim[RLIMIT_NICE].rlim_cur); binder_debug(BINDER_DEBUG_PRIORITY_CAP, "%d: nice value %ld not allowed use %ld instead\n", current->pid, nice, min_nice); diff --git a/kernel/sched/core.c b/kernel/sched/core.c index ea55072..ff871f5 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3015,7 +3015,7 @@ EXPORT_SYMBOL(set_user_nice); int can_nice(const struct task_struct *p, const int nice) { /* convert nice value [19,-20] to rlimit style value [1,40] */ - int nice_rlim = 20 - nice; + int nice_rlim = nice_to_rlimit(nice); return (nice_rlim <= task_rlimit(p, RLIMIT_NICE) || capable(CAP_SYS_NICE)); diff --git a/kernel/sys.c b/kernel/sys.c index fba0f29..66a751e 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -250,7 +250,7 @@ SYSCALL_DEFINE2(getpriority, int, which, int, who) else p = current; if (p) { - niceval = 20 - task_nice(p); + niceval = nice_to_rlimit(task_nice(p)); if (niceval > retval) retval = niceval; } @@ -261,7 +261,7 @@ SYSCALL_DEFINE2(getpriority, int, which, int, who) else pgrp = task_pgrp(current); do_each_pid_thread(pgrp, PIDTYPE_PGID, p) { - niceval = 20 - task_nice(p); + niceval = nice_to_rlimit(task_nice(p)); if (niceval > retval) retval = niceval; } while_each_pid_thread(pgrp, PIDTYPE_PGID, p); @@ -277,7 +277,7 @@ SYSCALL_DEFINE2(getpriority, int, which, int, who) do_each_thread(g, p) { if (uid_eq(task_uid(p), uid)) { - niceval = 20 - task_nice(p); + niceval = nice_to_rlimit(task_nice(p)); if (niceval > retval) retval = niceval; } -- 1.8.2.1 ^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH 2/2] treewide: remove all open implementation of nice_to_rlimit()/rlimit_to_nice(). 2014-05-08 9:33 ` [PATCH 2/2] treewide: remove all open implementation of nice_to_rlimit()/rlimit_to_nice() Dongsheng Yang @ 2014-05-08 14:34 ` Peter Zijlstra [not found] ` <CA+qeAOqCo9g=tNARWf4JESLZU6sAoSKYDvmfGE6OOmJQhajyDw@mail.gmail.com> 2014-05-19 13:10 ` [tip:sched/core] sched: Remove " tip-bot for Dongsheng Yang 2014-05-22 12:28 ` [tip:sched/core] sched: Consolidate open coded implementations of nice level frobbing into nice_to_rlimit () and rlimit_to_nice() tip-bot for Dongsheng Yang 2 siblings, 1 reply; 8+ messages in thread From: Peter Zijlstra @ 2014-05-08 14:34 UTC (permalink / raw) To: Dongsheng Yang; +Cc: mingo, linux-kernel [-- Attachment #1: Type: text/plain, Size: 1261 bytes --] On Thu, May 08, 2014 at 06:33:49PM +0900, Dongsheng Yang wrote: > As there are already two inline functions in prio.h to handle the convertiion > between nice value and rlimit style value of priority, this patch remove all > open implementation of these two functions. > > Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> > --- > drivers/staging/android/binder.c | 2 +- > kernel/sched/core.c | 2 +- > kernel/sys.c | 6 +++--- > 3 files changed, 5 insertions(+), 5 deletions(-) > > diff --git a/drivers/staging/android/binder.c b/drivers/staging/android/binder.c > index 179b21b..9311bb6 100644 > --- a/drivers/staging/android/binder.c > +++ b/drivers/staging/android/binder.c > @@ -436,7 +436,7 @@ static void binder_set_nice(long nice) > set_user_nice(current, nice); > return; > } > - min_nice = 20 - current->signal->rlim[RLIMIT_NICE].rlim_cur; > + min_nice = rlimit_to_nice(current->signal->rlim[RLIMIT_NICE].rlim_cur); > binder_debug(BINDER_DEBUG_PRIORITY_CAP, > "%d: nice value %ld not allowed use %ld instead\n", > current->pid, nice, min_nice); One does wonder WTF binder is smoking.. must be strong stuff. That's some qualitee crackpot code there. [-- Attachment #2: Type: application/pgp-signature, Size: 836 bytes --] ^ permalink raw reply [flat|nested] 8+ messages in thread
[parent not found: <CA+qeAOqCo9g=tNARWf4JESLZU6sAoSKYDvmfGE6OOmJQhajyDw@mail.gmail.com>]
* Re: [PATCH 2/2] treewide: remove all open implementation of nice_to_rlimit()/rlimit_to_nice(). [not found] ` <CA+qeAOqCo9g=tNARWf4JESLZU6sAoSKYDvmfGE6OOmJQhajyDw@mail.gmail.com> @ 2014-05-08 15:26 ` Peter Zijlstra 2014-05-09 0:10 ` Dongsheng Yang 0 siblings, 1 reply; 8+ messages in thread From: Peter Zijlstra @ 2014-05-08 15:26 UTC (permalink / raw) To: Dongsheng Yang; +Cc: Dongsheng Yang, mingo, linux-kernel [-- Attachment #1: Type: text/plain, Size: 421 bytes --] On Thu, May 08, 2014 at 10:51:13PM +0800, Dongsheng Yang wrote: > Just want to avoid using hardcoding of 20. If no, there is no meaning we > collect > priority related information into prio.h. And convertion between nice > value [-20,19] > and rlimit style value [0,40] is used by several callers currently. > Yeah, not really a comment on your patch, just a general observation on the thing you touched :-) [-- Attachment #2: Type: application/pgp-signature, Size: 836 bytes --] ^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH 2/2] treewide: remove all open implementation of nice_to_rlimit()/rlimit_to_nice(). 2014-05-08 15:26 ` Peter Zijlstra @ 2014-05-09 0:10 ` Dongsheng Yang 0 siblings, 0 replies; 8+ messages in thread From: Dongsheng Yang @ 2014-05-09 0:10 UTC (permalink / raw) To: Peter Zijlstra; +Cc: Dongsheng Yang, mingo, linux-kernel On 05/09/2014 12:26 AM, Peter Zijlstra wrote: > On Thu, May 08, 2014 at 10:51:13PM +0800, Dongsheng Yang wrote: >> Just want to avoid using hardcoding of 20. If no, there is no meaning we >> collect >> priority related information into prio.h. And convertion between nice >> value [-20,19] >> and rlimit style value [0,40] is used by several callers currently. >> > Yeah, not really a comment on your patch, just a general observation on > the thing you touched :-) Ha, okey, thanx for your reply. :) ^ permalink raw reply [flat|nested] 8+ messages in thread
* [tip:sched/core] sched: Remove all open implementation of nice_to_rlimit()/rlimit_to_nice(). 2014-05-08 9:33 ` [PATCH 2/2] treewide: remove all open implementation of nice_to_rlimit()/rlimit_to_nice() Dongsheng Yang 2014-05-08 14:34 ` Peter Zijlstra @ 2014-05-19 13:10 ` tip-bot for Dongsheng Yang 2014-05-22 12:28 ` [tip:sched/core] sched: Consolidate open coded implementations of nice level frobbing into nice_to_rlimit () and rlimit_to_nice() tip-bot for Dongsheng Yang 2 siblings, 0 replies; 8+ messages in thread From: tip-bot for Dongsheng Yang @ 2014-05-19 13:10 UTC (permalink / raw) To: linux-tip-commits; +Cc: linux-kernel, hpa, mingo, peterz, tglx, yangds.fnst Commit-ID: f6156cfc0d785f8ef195d6c2f538113e041b6d44 Gitweb: http://git.kernel.org/tip/f6156cfc0d785f8ef195d6c2f538113e041b6d44 Author: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> AuthorDate: Thu, 8 May 2014 18:33:49 +0900 Committer: Thomas Gleixner <tglx@linutronix.de> CommitDate: Mon, 19 May 2014 22:02:42 +0900 sched: Remove all open implementation of nice_to_rlimit()/rlimit_to_nice(). As there are already two inline functions in prio.h to handle the convertiion between nice value and rlimit style value of priority, this patch remove all open implementation of these two functions. Cc: mingo@redhat.com Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/a568a1e3cc8e78648f41b5035fa5e381d36274da.1399532322.git.yangds.fnst@cn.fujitsu.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> --- drivers/staging/android/binder.c | 2 +- kernel/sched/core.c | 2 +- kernel/sys.c | 6 +++--- 3 files changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/staging/android/binder.c b/drivers/staging/android/binder.c index 179b21b..9311bb6 100644 --- a/drivers/staging/android/binder.c +++ b/drivers/staging/android/binder.c @@ -436,7 +436,7 @@ static void binder_set_nice(long nice) set_user_nice(current, nice); return; } - min_nice = 20 - current->signal->rlim[RLIMIT_NICE].rlim_cur; + min_nice = rlimit_to_nice(current->signal->rlim[RLIMIT_NICE].rlim_cur); binder_debug(BINDER_DEBUG_PRIORITY_CAP, "%d: nice value %ld not allowed use %ld instead\n", current->pid, nice, min_nice); diff --git a/kernel/sched/core.c b/kernel/sched/core.c index c134eb0..084832c 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3033,7 +3033,7 @@ EXPORT_SYMBOL(set_user_nice); int can_nice(const struct task_struct *p, const int nice) { /* convert nice value [19,-20] to rlimit style value [1,40] */ - int nice_rlim = 20 - nice; + int nice_rlim = nice_to_rlimit(nice); return (nice_rlim <= task_rlimit(p, RLIMIT_NICE) || capable(CAP_SYS_NICE)); diff --git a/kernel/sys.c b/kernel/sys.c index fba0f29..66a751e 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -250,7 +250,7 @@ SYSCALL_DEFINE2(getpriority, int, which, int, who) else p = current; if (p) { - niceval = 20 - task_nice(p); + niceval = nice_to_rlimit(task_nice(p)); if (niceval > retval) retval = niceval; } @@ -261,7 +261,7 @@ SYSCALL_DEFINE2(getpriority, int, which, int, who) else pgrp = task_pgrp(current); do_each_pid_thread(pgrp, PIDTYPE_PGID, p) { - niceval = 20 - task_nice(p); + niceval = nice_to_rlimit(task_nice(p)); if (niceval > retval) retval = niceval; } while_each_pid_thread(pgrp, PIDTYPE_PGID, p); @@ -277,7 +277,7 @@ SYSCALL_DEFINE2(getpriority, int, which, int, who) do_each_thread(g, p) { if (uid_eq(task_uid(p), uid)) { - niceval = 20 - task_nice(p); + niceval = nice_to_rlimit(task_nice(p)); if (niceval > retval) retval = niceval; } ^ permalink raw reply related [flat|nested] 8+ messages in thread
* [tip:sched/core] sched: Consolidate open coded implementations of nice level frobbing into nice_to_rlimit () and rlimit_to_nice() 2014-05-08 9:33 ` [PATCH 2/2] treewide: remove all open implementation of nice_to_rlimit()/rlimit_to_nice() Dongsheng Yang 2014-05-08 14:34 ` Peter Zijlstra 2014-05-19 13:10 ` [tip:sched/core] sched: Remove " tip-bot for Dongsheng Yang @ 2014-05-22 12:28 ` tip-bot for Dongsheng Yang 2 siblings, 0 replies; 8+ messages in thread From: tip-bot for Dongsheng Yang @ 2014-05-22 12:28 UTC (permalink / raw) To: linux-tip-commits; +Cc: linux-kernel, hpa, mingo, peterz, tglx, yangds.fnst Commit-ID: 7aa2c016db2162defff77f6f5731bff3f25e5175 Gitweb: http://git.kernel.org/tip/7aa2c016db2162defff77f6f5731bff3f25e5175 Author: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> AuthorDate: Thu, 8 May 2014 18:33:49 +0900 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Thu, 22 May 2014 11:16:36 +0200 sched: Consolidate open coded implementations of nice level frobbing into nice_to_rlimit() and rlimit_to_nice() Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/a568a1e3cc8e78648f41b5035fa5e381d36274da.1399532322.git.yangds.fnst@cn.fujitsu.com Signed-off-by: Ingo Molnar <mingo@kernel.org> --- drivers/staging/android/binder.c | 2 +- include/linux/sched/prio.h | 16 ++++++++++++++++ kernel/sched/core.c | 2 +- kernel/sys.c | 6 +++--- 4 files changed, 21 insertions(+), 5 deletions(-) diff --git a/drivers/staging/android/binder.c b/drivers/staging/android/binder.c index 179b21b..9311bb6 100644 --- a/drivers/staging/android/binder.c +++ b/drivers/staging/android/binder.c @@ -436,7 +436,7 @@ static void binder_set_nice(long nice) set_user_nice(current, nice); return; } - min_nice = 20 - current->signal->rlim[RLIMIT_NICE].rlim_cur; + min_nice = rlimit_to_nice(current->signal->rlim[RLIMIT_NICE].rlim_cur); binder_debug(BINDER_DEBUG_PRIORITY_CAP, "%d: nice value %ld not allowed use %ld instead\n", current->pid, nice, min_nice); diff --git a/include/linux/sched/prio.h b/include/linux/sched/prio.h index ac32258..d9cf5a5 100644 --- a/include/linux/sched/prio.h +++ b/include/linux/sched/prio.h @@ -41,4 +41,20 @@ #define TASK_USER_PRIO(p) USER_PRIO((p)->static_prio) #define MAX_USER_PRIO (USER_PRIO(MAX_PRIO)) +/* + * Convert nice value [19,-20] to rlimit style value [1,40]. + */ +static inline long nice_to_rlimit(long nice) +{ + return (MAX_NICE - nice + 1); +} + +/* + * Convert rlimit style value [1,40] to nice value [-20, 19]. + */ +static inline long rlimit_to_nice(long prio) +{ + return (MAX_NICE - prio + 1); +} + #endif /* _SCHED_PRIO_H */ diff --git a/kernel/sched/core.c b/kernel/sched/core.c index da302ca..321d800 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3033,7 +3033,7 @@ EXPORT_SYMBOL(set_user_nice); int can_nice(const struct task_struct *p, const int nice) { /* convert nice value [19,-20] to rlimit style value [1,40] */ - int nice_rlim = 20 - nice; + int nice_rlim = nice_to_rlimit(nice); return (nice_rlim <= task_rlimit(p, RLIMIT_NICE) || capable(CAP_SYS_NICE)); diff --git a/kernel/sys.c b/kernel/sys.c index fba0f29..66a751e 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -250,7 +250,7 @@ SYSCALL_DEFINE2(getpriority, int, which, int, who) else p = current; if (p) { - niceval = 20 - task_nice(p); + niceval = nice_to_rlimit(task_nice(p)); if (niceval > retval) retval = niceval; } @@ -261,7 +261,7 @@ SYSCALL_DEFINE2(getpriority, int, which, int, who) else pgrp = task_pgrp(current); do_each_pid_thread(pgrp, PIDTYPE_PGID, p) { - niceval = 20 - task_nice(p); + niceval = nice_to_rlimit(task_nice(p)); if (niceval > retval) retval = niceval; } while_each_pid_thread(pgrp, PIDTYPE_PGID, p); @@ -277,7 +277,7 @@ SYSCALL_DEFINE2(getpriority, int, which, int, who) do_each_thread(g, p) { if (uid_eq(task_uid(p), uid)) { - niceval = 20 - task_nice(p); + niceval = nice_to_rlimit(task_nice(p)); if (niceval > retval) retval = niceval; } ^ permalink raw reply related [flat|nested] 8+ messages in thread
* [tip:sched/core] sched/prio: Add two inline function named nice_to_rlimit() and rlimit_to_nice() in prio.h. 2014-05-08 9:33 [PATCH 1/2] sched/prio: Add two inline function named nice_to_rlimit() and rlimit_to_nice() in prio.h Dongsheng Yang 2014-05-08 9:33 ` [PATCH 2/2] treewide: remove all open implementation of nice_to_rlimit()/rlimit_to_nice() Dongsheng Yang @ 2014-05-19 13:10 ` tip-bot for Dongsheng Yang 1 sibling, 0 replies; 8+ messages in thread From: tip-bot for Dongsheng Yang @ 2014-05-19 13:10 UTC (permalink / raw) To: linux-tip-commits; +Cc: linux-kernel, hpa, mingo, peterz, tglx, yangds.fnst Commit-ID: b482e5f5c22ef95ffe7c4d86fc9719455fb24bca Gitweb: http://git.kernel.org/tip/b482e5f5c22ef95ffe7c4d86fc9719455fb24bca Author: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> AuthorDate: Thu, 8 May 2014 18:33:48 +0900 Committer: Thomas Gleixner <tglx@linutronix.de> CommitDate: Mon, 19 May 2014 22:02:42 +0900 sched/prio: Add two inline function named nice_to_rlimit() and rlimit_to_nice() in prio.h. This patch add two inline functions named nice_to_rlimit() and rlimit_to_nice() in prio.h. They are handle the convertion between nice value [19,-20] and rlimit style value [1,40]. Cc: mingo@redhat.com Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/e1f9c9f2023719e0738e16cd6807c74c68b08fad.1399532322.git.yangds.fnst@cn.fujitsu.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> --- include/linux/sched/prio.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/include/linux/sched/prio.h b/include/linux/sched/prio.h index ac32258..d9cf5a5 100644 --- a/include/linux/sched/prio.h +++ b/include/linux/sched/prio.h @@ -41,4 +41,20 @@ #define TASK_USER_PRIO(p) USER_PRIO((p)->static_prio) #define MAX_USER_PRIO (USER_PRIO(MAX_PRIO)) +/* + * Convert nice value [19,-20] to rlimit style value [1,40]. + */ +static inline long nice_to_rlimit(long nice) +{ + return (MAX_NICE - nice + 1); +} + +/* + * Convert rlimit style value [1,40] to nice value [-20, 19]. + */ +static inline long rlimit_to_nice(long prio) +{ + return (MAX_NICE - prio + 1); +} + #endif /* _SCHED_PRIO_H */ ^ permalink raw reply related [flat|nested] 8+ messages in thread
end of thread, other threads:[~2014-05-22 12:29 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
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2014-05-08 9:33 [PATCH 1/2] sched/prio: Add two inline function named nice_to_rlimit() and rlimit_to_nice() in prio.h Dongsheng Yang
2014-05-08 9:33 ` [PATCH 2/2] treewide: remove all open implementation of nice_to_rlimit()/rlimit_to_nice() Dongsheng Yang
2014-05-08 14:34 ` Peter Zijlstra
[not found] ` <CA+qeAOqCo9g=tNARWf4JESLZU6sAoSKYDvmfGE6OOmJQhajyDw@mail.gmail.com>
2014-05-08 15:26 ` Peter Zijlstra
2014-05-09 0:10 ` Dongsheng Yang
2014-05-19 13:10 ` [tip:sched/core] sched: Remove " tip-bot for Dongsheng Yang
2014-05-22 12:28 ` [tip:sched/core] sched: Consolidate open coded implementations of nice level frobbing into nice_to_rlimit () and rlimit_to_nice() tip-bot for Dongsheng Yang
2014-05-19 13:10 ` [tip:sched/core] sched/prio: Add two inline function named nice_to_rlimit() and rlimit_to_nice() in prio.h tip-bot for Dongsheng Yang
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