Messages in this thread | | | Date | Wed, 4 Jan 2023 16:29:44 -0800 | Subject | Re: [PATCH v10 11/13] x86/resctrl: Add interface to write mbm_total_bytes_config | From | Reinette Chatre <> |
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Hi Babu,
On 12/22/2022 3:31 PM, Babu Moger wrote:
...
> +static ssize_t mbm_total_bytes_config_write(struct kernfs_open_file *of, > + char *buf, size_t nbytes, > + loff_t off) > +{ > + struct rdt_resource *r = of->kn->parent->priv; > + int ret; > + > + /* Valid input requires a trailing newline */ > + if (nbytes == 0 || buf[nbytes - 1] != '\n') > + return -EINVAL; > + > + cpus_read_lock();
Could you please elaborate why this lock is needed here as well as in the following patch?
Reinette
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