From: Peter Zijlstra <peterz@infradead.org>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@linuxfoundation.org>,
Ingo Molnar <mingo@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,
Kees Cook <kees@kernel.org>
Subject: Re: [patch V2 m@/6] perf/core: Split out mlock limit handling
Date: Mon, 11 Aug 2025 12:49:40 +0200 [thread overview]
Message-ID: <20250811104940.GF1613200@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <20250811070620.463634790@linutronix.de>
On Mon, Aug 11, 2025 at 09:06:37AM +0200, Thomas Gleixner wrote:
> To prepare for splitting the buffer allocation out into seperate functions
> for the ring buffer and the AUX buffer, split out mlock limit handling into
> a helper function, which can be called from both.
>
> No functional change intended.
>
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
> Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
>
> ---
Does this not also need this? I found this stray user_extra when I
eventually removed the local user_extra variable.
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -6997,8 +6997,6 @@ static int perf_mmap(struct file *file,
if (vma_size != PAGE_SIZE * nr_pages)
return -EINVAL;
- user_extra = nr_pages;
-
mutex_lock(&event->mmap_mutex);
ret = -EINVAL;
next prev parent reply other threads:[~2025-08-11 10:49 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-11 7:06 [patch V2 m@/6] perf: Convert mmap() related reference counts to refcount_t Thomas Gleixner
2025-08-11 7:06 ` [patch V2 m@/6] perf/core: Remove redundant condition for AUX buffer size Thomas Gleixner
2025-08-11 7:06 ` [patch V2 m@/6] perf/core: Split out mlock limit handling Thomas Gleixner
2025-08-11 10:49 ` Peter Zijlstra [this message]
2025-08-11 12:42 ` Thomas Gleixner
2025-08-11 14:40 ` Peter Zijlstra
2025-08-11 7:06 ` [patch V2 m@/6] perf/core: Split out VM accounting Thomas Gleixner
2025-08-11 7:06 ` [patch V2 m@/6] perf/core: Split out AUX buffer allocation Thomas Gleixner
2025-08-11 9:04 ` Peter Zijlstra
2025-08-11 9:36 ` Peter Zijlstra
2025-08-11 10:04 ` Peter Zijlstra
2025-08-11 12:28 ` Peter Zijlstra
2025-08-11 12:46 ` Thomas Gleixner
2025-08-11 12:44 ` Thomas Gleixner
2025-08-11 7:06 ` [patch V2 m@/6] perf/core: Split the ringbuffer mmap() and allocation code out Thomas Gleixner
2025-08-11 7:06 ` [patch V2 m@/6] perf/core: Convert mmap() refcounts to refcount_t Thomas Gleixner
2025-08-11 8:02 ` [patch V2 m@/6] perf: Convert mmap() related reference counts " Lorenzo Stoakes
2025-08-11 12:32 ` Thomas Gleixner
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