From: Michal Hocko <mhocko@suse.com>
To: Oscar Salvador <osalvador@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Vlastimil Babka <vbabka@suse.cz>,
Eric Dumazet <edumazet@google.com>,
Waiman Long <longman@redhat.com>,
Suren Baghdasaryan <surenb@google.com>
Subject: Re: [PATCH 3/3] mm,page_owner: Filter out stacks by a threshold counter
Date: Thu, 1 Sep 2022 10:40:32 +0200 [thread overview]
Message-ID: <YxBwAANmAAivHYA5@dhcp22.suse.cz> (raw)
In-Reply-To: <20220901044249.4624-4-osalvador@suse.de>
On Thu 01-09-22 06:42:49, Oscar Salvador wrote:
[...]
> +static ssize_t read_page_owner_threshold(struct file *file, char __user *buf,
> + size_t count, loff_t *pos)
> +{
> + char *kbuf;
> + int ret = 0;
> +
> + count = min_t(size_t, count, PAGE_SIZE);
> +
> + if (*pos >= count)
> + return 0;
> +
> + kbuf = kmalloc(count, GFP_KERNEL);
No, you do not want to trigger user defined allocation like that. I
would use seq_file.
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2022-09-01 8:40 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-01 4:42 [PATCH 0/3] page_owner: print stacks and their counter Oscar Salvador
2022-09-01 4:42 ` [PATCH 1/3] lib/stackdepot: Add a refcount field in stack_record Oscar Salvador
2022-09-01 8:24 ` Marco Elver
2022-09-01 8:38 ` Michal Hocko
2022-09-01 9:18 ` Marco Elver
2022-09-01 10:01 ` Michal Hocko
2022-09-01 10:20 ` Marco Elver
2022-09-05 20:53 ` Andrey Konovalov
2022-09-02 3:27 ` Oscar Salvador
2022-09-01 4:42 ` [PATCH 2/3] mm, page_owner: Add page_owner_stacks file to print out only stacks and their counter Oscar Salvador
2022-09-01 8:16 ` Ammar Faizi
2022-09-02 3:33 ` Oscar Salvador
2022-09-01 19:29 ` kernel test robot
2022-09-02 0:56 ` kernel test robot
2022-09-01 4:42 ` [PATCH 3/3] mm,page_owner: Filter out stacks by a threshold counter Oscar Salvador
2022-09-01 8:31 ` Ammar Faizi
2022-09-02 3:36 ` Oscar Salvador
2022-09-01 8:40 ` Michal Hocko [this message]
2022-09-02 3:37 ` Oscar Salvador
2022-09-01 8:32 ` [PATCH 0/3] page_owner: print stacks and their counter Michal Hocko
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