From: Andrew Morton <akpm@linux-foundation.org>
To: Giuseppe Scrivano <gscrivan@redhat.com>
Cc: linux-kernel@vger.kernel.org, gregkh@linuxfoundation.org,
mingo@kernel.org, dave@stgolabs.net
Subject: Re: [RFC PATCH] ipc, mqueue: lazy call kern_mount_data in new namespaces
Date: Tue, 28 Nov 2017 13:53:16 -0800 [thread overview]
Message-ID: <20171128135316.6d7bba7fe909ba3d90e318db@linux-foundation.org> (raw)
In-Reply-To: <20171127125550.15514-1-gscrivan@redhat.com>
On Mon, 27 Nov 2017 13:55:50 +0100 Giuseppe Scrivano <gscrivan@redhat.com> wrote:
> kern_mount_data is a relatively expensive operation when creating a
> new IPC namespace, so delay the mount until its first usage when not
> creating the the global namespace.
>
> On my machine, the time for creating 1000 new IPC namespaces dropped
> from ~8s to ~2s.
OK, but this simply moves the expense so it happens later on. Why is
that better?
next prev parent reply other threads:[~2017-11-28 21:53 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-27 12:55 Giuseppe Scrivano
2017-11-28 7:09 ` Davidlohr Bueso
2017-11-28 21:53 ` Andrew Morton [this message]
2017-11-29 10:33 ` Giuseppe Scrivano
2017-11-29 22:17 ` Andrew Morton
2017-11-30 12:20 ` Giuseppe Scrivano
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