From: Davidlohr Bueso <dave@stgolabs.net>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
Elena Reshetova <elena.reshetova@intel.com>,
linux-kernel@vger.kernel.org, peterz@infradead.org,
gregkh@linuxfoundation.org, mingo@redhat.com,
adobriyan@gmail.com, serge@hallyn.com, arozansk@redhat.com,
keescook@chromium.org, Hans Liljestrand <ishkamiel@gmail.com>,
David Windsor <dwindsor@gmail.com>
Subject: Re: [PATCH 1/3] ipc: convert ipc_namespace.count from atomic_t to refcount_t
Date: Wed, 19 Jul 2017 15:54:27 -0700 [thread overview]
Message-ID: <20170719225427.GD14395@linux-80c1.suse> (raw)
In-Reply-To: <20170719153546.37567fbf77861653172fa263@linux-foundation.org>
On Wed, 19 Jul 2017, Andrew Morton wrote:
>I do rather dislike these conversions from the point of view of
>performance overhead and general code bloat. But I seem to have lost
>that struggle and I don't think any of these are fastpath(?).
Well, since we now have fd25d19 (locking/refcount: Create unchecked atomic_t
implementation), performance is supposed to be ok. It would be lovely to have
some actual numbers nonetheless.
Thanks,
Davidlohr
>
next prev parent reply other threads:[~2017-07-19 22:54 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-07 8:59 [PATCH 0/3] v2 ipc subsystem refcount coversions Elena Reshetova
2017-07-07 8:59 ` [PATCH 1/3] ipc: convert ipc_namespace.count from atomic_t to refcount_t Elena Reshetova
2017-07-09 21:59 ` Eric W. Biederman
2017-07-10 6:48 ` Reshetova, Elena
2017-07-10 8:37 ` Eric W. Biederman
2017-07-10 9:34 ` Alexey Dobriyan
2017-07-10 11:19 ` Eric W. Biederman
2017-07-10 9:56 ` Reshetova, Elena
2017-07-10 11:26 ` Eric W. Biederman
2017-07-10 12:11 ` Reshetova, Elena
2017-07-10 20:32 ` Eric W. Biederman
2017-07-12 9:21 ` Reshetova, Elena
2017-07-19 22:35 ` Andrew Morton
2017-07-19 22:54 ` Davidlohr Bueso [this message]
2017-07-19 22:58 ` Andrew Morton
2017-07-19 23:11 ` Davidlohr Bueso
2017-07-19 23:20 ` Kees Cook
2017-07-20 0:32 ` Kees Cook
2017-07-20 9:34 ` Ingo Molnar
2017-07-20 12:34 ` Eric W. Biederman
2017-07-20 15:12 ` Kees Cook
2017-07-07 8:59 ` [PATCH 2/3] ipc: convert sem_undo_list.refcnt " Elena Reshetova
2017-07-07 8:59 ` [PATCH 3/3] ipc: convert kern_ipc_perm.refcount " Elena Reshetova
-- strict thread matches above, loose matches on Subject: below --
2017-02-20 11:29 [PATCH 0/3] ipc subsystem refcounter conversions Elena Reshetova
2017-02-20 11:29 ` [PATCH 1/3] ipc: convert ipc_namespace.count from atomic_t to refcount_t Elena Reshetova
2017-05-27 19:41 ` Kees Cook
2017-05-28 12:10 ` Manfred Spraul
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