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Message-ID: <2033865a-b57b-4956-8ab6-d749ad782aa3@intel.com>
Date: Thu, 9 Nov 2023 09:43:31 -0800
From: Reinette Chatre <reinette.chatre@...el.com>
To: James Morse <james.morse@....com>, <x86@...nel.org>,
<linux-kernel@...r.kernel.org>
CC: Fenghua Yu <fenghua.yu@...el.com>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
H Peter Anvin <hpa@...or.com>,
Babu Moger <Babu.Moger@....com>,
<shameerali.kolothum.thodi@...wei.com>,
D Scott Phillips OS <scott@...amperecomputing.com>,
<carl@...amperecomputing.com>, <lcherian@...vell.com>,
<bobo.shaobowang@...wei.com>, <tan.shaopeng@...itsu.com>,
<baolin.wang@...ux.alibaba.com>,
Jamie Iles <quic_jiles@...cinc.com>,
Xin Hao <xhao@...ux.alibaba.com>, <peternewman@...gle.com>,
<dfustini@...libre.com>, <amitsinght@...vell.com>
Subject: Re: [PATCH v7 08/24] x86/resctrl: Track the number of dirty RMID a
CLOSID has
Hi James,
On 10/25/2023 11:03 AM, James Morse wrote:
> @@ -794,13 +815,30 @@ void mbm_setup_overflow_handler(struct rdt_domain *dom, unsigned long delay_ms)
> static int dom_data_init(struct rdt_resource *r)
> {
> u32 idx_limit = resctrl_arch_system_num_rmid_idx();
> + u32 num_closid = resctrl_arch_get_num_closid(r);
> struct rmid_entry *entry = NULL;
> + int err = 0, i;
> u32 idx;
> - int i;
> +
> + mutex_lock(&rdtgroup_mutex);
> + if (IS_ENABLED(CONFIG_RESCTRL_RMID_DEPENDS_ON_CLOSID)) {
> + u32 *tmp;
> +
> + tmp = kcalloc(num_closid, sizeof(*tmp), GFP_KERNEL);
> + if (!tmp) {
> + err = -ENOMEM;
> + goto out_unlock;
> + }
> +
> + closid_num_dirty_rmid = tmp;
> + }
>
> rmid_ptrs = kcalloc(idx_limit, sizeof(struct rmid_entry), GFP_KERNEL);
> - if (!rmid_ptrs)
> - return -ENOMEM;
> + if (!rmid_ptrs) {
> + kfree(closid_num_dirty_rmid);
Since this is a global variable and resctrl keeps running on this alloc
failure I think it will be safer to add a:
closid_num_dirty_rmid = NULL
With that added you can add:
Reviewed-by: Reinette Chatre <reinette.chatre@...el.com>
Reinette
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