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Groups > linux.kernel > #1341889
| From | Thomas Gleixner <tglx@linutronix.de> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread |
| Date | 2016-02-24 12:20 +0100 |
| Message-ID | <r5FE7-3ID-43@gated-at.bofh.it> (permalink) |
| References | <r5uyZ-4cb-5@gated-at.bofh.it> <r5uz0-4cb-19@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Tue, 23 Feb 2016, Mathieu Desnoyers wrote:
> +/*
> + * If parent process has a thread-local ABI, the child inherits. Only applies
> + * when forking a process, not a thread.
> + */
> +void getcpu_cache_fork(struct task_struct *t)
> +{
> + t->cpu_cache = current->cpu_cache;
> +}
> +
> +void getcpu_cache_execve(struct task_struct *t)
> +{
> + t->cpu_cache = NULL;
> +}
> +
> +void getcpu_cache_exit(struct task_struct *t)
> +{
> + t->cpu_cache = NULL;
> +}
That's hardly worth a function call. Please inline.
> +/*
> + * sys_getcpu_cache - setup getcpu cache for caller thread
> + */
> +SYSCALL_DEFINE3(getcpu_cache, int, cmd, int32_t __user * __user *, cpu_cachep,
> + int, flags)
> +{
> + if (unlikely(flags))
> + return -EINVAL;
New line for readability sake.
> + switch (cmd) {
> + case GETCPU_CACHE_GET:
Other than that: Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
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[PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-02-24 00:30 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Thomas Gleixner <tglx@linutronix.de> - 2016-02-24 12:20 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-02-24 18:20 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Rasmus Villemoes <linux@rasmusvillemoes.dk> - 2016-02-26 00:40 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-02-26 18:50 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Peter Zijlstra <peterz@infradead.org> - 2016-02-25 11:00 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-02-25 18:00 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Peter Zijlstra <peterz@infradead.org> - 2016-02-25 18:10 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-02-25 18:20 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Peter Zijlstra <peterz@infradead.org> - 2016-02-26 12:40 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Thomas Gleixner <tglx@linutronix.de> - 2016-02-26 17:40 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-02-26 18:30 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Thomas Gleixner <tglx@linutronix.de> - 2016-02-26 19:10 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-02-26 21:30 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread "H. Peter Anvin" <hpa@zytor.com> - 2016-02-27 00:10 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-02-27 01:50 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread "H. Peter Anvin" <hpa@zytor.com> - 2016-02-27 07:30 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-02-27 15:20 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Peter Zijlstra <peterz@infradead.org> - 2016-02-27 16:00 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Linus Torvalds <torvalds@linux-foundation.org> - 2016-02-27 19:40 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread "H. Peter Anvin" <hpa@zytor.com> - 2016-02-27 20:10 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-02-28 01:00 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Linus Torvalds <torvalds@linux-foundation.org> - 2016-02-28 02:00 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-02-28 15:40 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Peter Zijlstra <peterz@infradead.org> - 2016-02-29 11:40 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-03-01 21:30 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Peter Zijlstra <peterz@infradead.org> - 2016-03-01 22:40 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Peter Zijlstra <peterz@infradead.org> - 2016-03-01 22:40 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread "H. Peter Anvin" <hpa@zytor.com> - 2016-03-01 23:00 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Peter Zijlstra <peterz@infradead.org> - 2016-03-02 11:40 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Peter Zijlstra <peterz@infradead.org> - 2016-02-29 11:40 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Arnd Bergmann <arnd@arndb.de> - 2016-02-29 11:50 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-02-29 13:50 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Arnd Bergmann <arnd@arndb.de> - 2016-02-29 14:20 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread "H. Peter Anvin" <hpa@zytor.com> - 2016-02-29 19:30 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Geert Uytterhoeven <geert@linux-m68k.org> - 2016-03-02 11:50 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread "H. Peter Anvin" <hpa@zytor.com> - 2016-03-01 19:30 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Mathieu Desnoyers <mathieu.desnoyers@efficios.com> - 2016-03-01 19:50 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Geert Uytterhoeven <geert@linux-m68k.org> - 2016-02-28 14:10 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Linus Torvalds <torvalds@linux-foundation.org> - 2016-02-28 17:30 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread Peter Zijlstra <peterz@infradead.org> - 2016-02-29 11:10 +0100
Re: [PATCH v4 1/5] getcpu_cache system call: cache CPU number of running thread "H. Peter Anvin" <hpa@zytor.com> - 2016-02-27 16:10 +0100
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