From: Thomas Gleixner <tglx@linutronix.de>
To: Vikas Shivappa <vikas.shivappa@linux.intel.com>
Cc: vikas.shivappa@intel.com, linux-kernel@vger.kernel.org,
x86@kernel.org, hpa@zytor.com, mingo@kernel.org,
peterz@infradead.org, ravi.v.shankar@intel.com,
tony.luck@intel.com, fenghua.yu@intel.com,
h.peter.anvin@intel.com
Subject: Re: [PATCH 5/8] x86/intel_rct/mba: Add MBA structures and initialize MBA
Date: Mon, 16 Jan 2017 15:06:08 +0100 (CET) [thread overview]
Message-ID: <alpine.DEB.2.20.1701161500210.3877@nanos> (raw)
In-Reply-To: <1484076788-25385-6-git-send-email-vikas.shivappa@linux.intel.com>
On Tue, 10 Jan 2017, Vikas Shivappa wrote:
> +static void rdt_get_mem_config(struct rdt_resource *r)
> +{
> + union cpuid_0x10_3_eax eax;
> + union cpuid_0x10_x_edx edx;
> + u32 ebx, ecx;
> +
> + cpuid_count(0x00000010, 3, &eax.full, &ebx, &ecx, &edx.full);
> + r->num_closid = edx.split.cos_max + 1;
> + r->max_delay = eax.split.max_delay + 1;
> + r->no_ctrl = 0;
> + if (ecx & MBE_IS_LINEAR)
> + r->delay_linear = true;
> +
> + if (r->delay_linear)
> + r->delay_gran = MAX_MBA_THRTL - r->max_delay;
What's the point of this extra conditional?
if (ecx & MBE_IS_LINEAR) {
r->delay_linear = true;
r->delay_gran = MAX_MBA_THRTL - r->max_delay;
}
would be too obvious and easy to understand, right?
> +static int domain_setup_ctrlval(struct rdt_resource *r, struct rdt_domain *d)
> +{
> + int i;
> +
> + d->ctrl_val = kmalloc_array(r->num_closid,
> + sizeof(*d->ctrl_val), GFP_KERNEL);
> + if (!d->ctrl_val) {
> + kfree(d);
Freeing memory in the error path of some other random function is just wrong.
if (!d->ctrl_val)
return -ENOMEM;
and deal with the fallout at the calling function.
Thanks,
tglx
next prev parent reply other threads:[~2017-01-16 14:06 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-10 19:33 [PATCH 0/8 V1] x86/intel_rdt: Memory b/w Allocation support Vikas Shivappa
2017-01-10 19:33 ` [PATCH 1/8] Documentation, x86: Documentation for Intel Mem b/w allocation user interface Vikas Shivappa
2017-01-16 13:43 ` Thomas Gleixner
2017-01-18 0:51 ` Shivappa Vikas
2017-01-18 9:01 ` Thomas Gleixner
2017-01-23 18:57 ` Shivappa Vikas
2017-01-23 19:01 ` Thomas Gleixner
2017-01-24 22:10 ` Shivappa Vikas
2017-01-10 19:33 ` [PATCH 2/8] x86/intel_rdt/mba: Generalize the naming to get ready for MBA Vikas Shivappa
2017-01-16 13:45 ` Thomas Gleixner
2017-01-10 19:33 ` [PATCH 3/8] x86/intel_rdt/mba: Improvements to handle more RDT resources like MBA Vikas Shivappa
2017-01-16 13:54 ` Thomas Gleixner
2017-01-18 0:53 ` Shivappa Vikas
2017-01-18 9:05 ` Thomas Gleixner
2017-01-10 19:33 ` [PATCH 4/8] x86/intel_rdt/mba: Memory b/w allocation feature detect Vikas Shivappa
2017-01-16 13:59 ` Thomas Gleixner
2017-01-16 14:41 ` Peter Zijlstra
2017-01-16 16:16 ` Thomas Gleixner
2017-01-10 19:33 ` [PATCH 5/8] x86/intel_rct/mba: Add MBA structures and initialize MBA Vikas Shivappa
2017-01-16 14:06 ` Thomas Gleixner [this message]
2017-01-18 0:56 ` Shivappa Vikas
2017-01-10 19:33 ` [PATCH 6/8] x86/intel_rdt/mba: Add info directory files for MBA Vikas Shivappa
2017-01-16 14:14 ` Thomas Gleixner
2017-01-18 1:02 ` Shivappa Vikas
2017-01-18 9:08 ` Thomas Gleixner
2017-01-23 19:45 ` Shivappa Vikas
2017-01-10 19:33 ` [PATCH 7/8] x86/intel_rdt/mba: Add schemata file support " Vikas Shivappa
2017-01-16 16:07 ` Thomas Gleixner
2017-01-18 1:03 ` Shivappa Vikas
2017-01-10 19:33 ` [PATCH 8/8] x86/intel_rdt: rmdir,umount and hotcpu updates " Vikas Shivappa
2017-01-16 16:13 ` Thomas Gleixner
2017-01-23 20:18 ` Shivappa Vikas
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