From: Andrew Morton <akpm@linux-foundation.org>
To: Markus Metzger <markus.t.metzger@intel.com>
Cc: andi-suse@firstfloor.org, hpa@zytor.com,
linux-kernel@vger.kernel.org, mingo@elte.hu, tglx@linutronix.de,
markus.t.metzger@intel.com, markus.t.metzger@gmail.com,
suresh.b.siddha@intel.com, roland@redhat.com,
mtk.manpages@gmail.com, eranian@googlemail.com,
juan.villacis@intel.com
Subject: Re: [patch 1/1] x86, ptrace: PEBS support
Date: Tue, 15 Apr 2008 17:35:34 -0700 [thread overview]
Message-ID: <20080415173534.b746f8da.akpm@linux-foundation.org> (raw)
In-Reply-To: <20080408110158.A9336@sedona.ch.intel.com>
On Tue, 8 Apr 2008 11:01:58 +0200
Markus Metzger <markus.t.metzger@intel.com> wrote:
> +static inline void *ds_allocate_buffer(size_t size, unsigned int *pages)
> {
> - (*(unsigned long *)(base + ds_cfg.bts_interrupt_threshold.offset)) = value;
> + unsigned long rlim, vm, pgsz;
> + void *buffer;
> +
> + pgsz = PAGE_ALIGN(size) >> PAGE_SHIFT;
> +
> + rlim = current->signal->rlim[RLIMIT_AS].rlim_cur >> PAGE_SHIFT;
> + vm = current->mm->total_vm + pgsz;
> + if (rlim < vm)
> + return 0;
> +
> + rlim = current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur >> PAGE_SHIFT;
> + vm = current->mm->locked_vm + pgsz;
> + if (rlim < vm)
> + return 0;
Should we skip the RLIMIT_MEMLOCK check if capable(CAP_IPC_LOCK)?
It's a fairly large patch.
next prev parent reply other threads:[~2008-04-16 0:37 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-08 9:01 [patch 1/1] x86, ptrace: PEBS support Markus Metzger
2008-04-16 0:35 ` Andrew Morton [this message]
2008-04-16 7:15 ` Andi Kleen
2008-04-16 8:51 ` stephane eranian
2008-04-16 14:47 ` Ingo Molnar
2008-04-16 22:59 ` stephane eranian
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