From: Cyrill Gorcunov <gorcunov@gmail.com>
To: Nikolay Borisov <kernel@kyup.com>
Cc: john@johnmccutchan.com, eparis@redhat.com, ebiederm@xmission.com,
jack@suse.cz, linux-kernel@vger.kernel.org, avagin@openvz.org,
netdev@vger.kernel.org, operations@siteground.com
Subject: Re: [PATCH 1/4] inotify: Add infrastructure to account inotify limits per-namespace
Date: Mon, 6 Jun 2016 11:05:57 +0300 [thread overview]
Message-ID: <20160606080557.GG2211@uranus.lan> (raw)
In-Reply-To: <1464767580-22732-2-git-send-email-kernel@kyup.com>
On Wed, Jun 01, 2016 at 10:52:57AM +0300, Nikolay Borisov wrote:
> This patch adds the necessary members to user_struct. The idea behind
> the solution is really simple - user the userns pointers as keys into
> a hash table which holds the inotify instances/watches counts. This
> allows to account the limits per userns rather than per real user,
> which makes certain scenarios such as a single mapped user in a
> container deplete the inotify resources for all other users, which
> map to the exact same real user.
>
> Signed-off-by: Nikolay Borisov <kernel@kyup.com>
...
> +static inline unsigned long inotify_dec_return_dev(struct user_struct *user,
> + void *key)
> +{
> + struct inotify_state *state;
> + unsigned long ret;
> +
> + spin_lock(&user->inotify_lock);
> + state = __find_inotify_state(user, key);
> + ret = --state->inotify_devs;
> + spin_unlock(&user->inotify_lock);
> +
> + return ret;
> +}
Hi Nikolay! Could you please explain why this new function is not used anywhere
in other patches or I miss something obvious?
next prev parent reply other threads:[~2016-06-06 8:06 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-01 7:52 [RFC PATCH 0/4] Make inotify instance/watches be accounted per userns Nikolay Borisov
2016-06-01 7:52 ` [PATCH 1/4] inotify: Add infrastructure to account inotify limits per-namespace Nikolay Borisov
2016-06-06 8:05 ` Cyrill Gorcunov [this message]
2016-06-06 9:26 ` Nikolay Borisov
2016-06-01 7:52 ` [PATCH 2/4] inotify: Convert inotify limits to be accounted per-realuser/per-namespace Nikolay Borisov
2016-06-01 7:52 ` [PATCH 3/4] misc: Rename the HASH_SIZE macro Nikolay Borisov
2016-06-01 18:13 ` David Miller
2016-06-01 7:53 ` [PATCH 4/4] inotify: Don't include inotify.h when !CONFIG_INOTIFY_USER Nikolay Borisov
2016-06-01 16:00 ` [RFC PATCH 0/4] Make inotify instance/watches be accounted per userns Eric W. Biederman
2016-06-02 6:27 ` Nikolay Borisov
2016-06-02 16:19 ` Eric W. Biederman
2016-06-02 7:49 ` Jan Kara
2016-06-02 16:58 ` Eric W. Biederman
2016-06-03 11:14 ` Nikolay Borisov
2016-06-03 20:41 ` Eric W. Biederman
2016-06-06 6:41 ` Nikolay Borisov
2016-06-06 20:00 ` Eric W. Biederman
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