From: Alex Elsayed <eternaleye@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: linux-api@vger.kernel.org
Subject: Re: [PATCH 00/12] Add kdbus implementation
Date: Thu, 30 Oct 2014 13:28:09 -0700 [thread overview]
Message-ID: <m2u70q$gtl$2@ger.gmane.org> (raw)
In-Reply-To: CALCETrXv_CevG7166++ZHBok0ae7mNhF83VjrRVQ2AKF22Vf_g@mail.gmail.com
Andy Lutomirski wrote:
<snip>
> There should be a number measured in, say, nanoseconds in here
> somewhere. The actual extent of the speedup is unmeasurable here.
> Also, it's worth reading at least one of Linus' many rants about
> zero-copy. It's not an automatic win.
It's well-understood that it's not an automatic win; significant testing on
multiple architectures indicated that 512K is a surprisingly universal
crossover point. The userspace code, therefore, switches from copying
(normal kdbus parameters) to zero-copy (memfds) right around there.
next prev parent reply other threads:[~2014-10-30 20:28 UTC|newest]
Thread overview: 112+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-29 22:00 [PATCH 00/12] Add kdbus implementation Greg Kroah-Hartman
2014-10-29 22:00 ` kdbus: add documentation Greg Kroah-Hartman
2014-10-30 12:20 ` Peter Meerwald
[not found] ` <alpine.DEB.2.02.1410301231040.32212-jW+XmwGofnusTnJN9+BGXg@public.gmane.org>
2014-11-02 1:29 ` Greg Kroah-Hartman
[not found] ` <1414620056-6675-1-git-send-email-gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>
2014-10-29 22:00 ` kdbus: add header file Greg Kroah-Hartman
[not found] ` <1414620056-6675-3-git-send-email-gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>
2014-10-30 8:20 ` Arnd Bergmann
2014-10-30 11:02 ` Tom Gundersen
2014-10-30 11:26 ` Arnd Bergmann
2014-10-30 11:52 ` Daniel Mack
2014-10-30 12:03 ` Arnd Bergmann
2014-10-31 10:03 ` Daniel Mack
2014-10-29 22:00 ` kdbus: add connection pool implementation Greg Kroah-Hartman
2014-10-29 22:15 ` [PATCH 00/12] Add kdbus implementation Greg KH
[not found] ` <20141029221505.GA7812-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2014-10-30 4:04 ` Eric W. Biederman
[not found] ` <87egtqurrp.fsf-JOvCrm2gF+uungPnsOpG7nhyD016LWXt@public.gmane.org>
2014-10-30 7:12 ` Daniel Mack
2014-10-29 22:19 ` Andy Lutomirski
2014-10-29 22:25 ` Greg Kroah-Hartman
2014-10-29 22:28 ` Andy Lutomirski
2014-10-29 22:36 ` Andy Lutomirski
[not found] ` <CALCETrX6vf7cKy=XDhDtn9hn1W930MRxBa=pk93RnyuZ-EaNyw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-10-30 7:44 ` Daniel Mack
[not found] ` <CALCETrUBegZ4F1sKq3LxUgANX3=syYOrqOp9=F--g9pkVHHgUA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-11-05 14:34 ` Daniel Mack
2014-10-29 23:00 ` Jiri Kosina
[not found] ` <alpine.LRH.2.00.1410292354480.11562-1ReQVI26iDCaZKY3DrU6dA@public.gmane.org>
2014-10-29 23:11 ` Greg Kroah-Hartman
[not found] ` <20141029231106.GB16548-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2014-10-29 23:12 ` Greg Kroah-Hartman
2014-10-29 23:24 ` Jiri Kosina
[not found] ` <alpine.LRH.2.00.1410300019570.11562-1ReQVI26iDCaZKY3DrU6dA@public.gmane.org>
2014-10-29 23:26 ` Jiri Kosina
[not found] ` <alpine.LRH.2.00.1410300024530.11562-1ReQVI26iDCaZKY3DrU6dA@public.gmane.org>
2014-10-29 23:34 ` Greg Kroah-Hartman
2014-10-29 23:40 ` Greg Kroah-Hartman
2014-10-29 23:55 ` Andy Lutomirski
2014-10-30 11:52 ` Tom Gundersen
[not found] ` <CAG-2HqX9RUQHiF1U_CXiDVVLS-7aUOQdYn7EVNSMZNdbe38cTA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-10-30 12:28 ` Simon McVittie
2014-10-30 13:59 ` Andy Lutomirski
2014-10-30 20:28 ` Alex Elsayed [this message]
2014-10-30 9:51 ` Karol Lewandowski
[not found] ` <54520A21.20404-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2014-10-30 10:44 ` Karol Lewandowski
[not found] ` <54521697.1030900-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2014-10-30 14:47 ` Greg Kroah-Hartman
[not found] ` <20141030144709.GA19721-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2014-10-30 19:55 ` Karol Lewandowski
[not found] ` <545297CC.6020306-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2014-10-30 20:24 ` Greg Kroah-Hartman
2014-10-31 11:15 ` Karol Lewandowski
2014-10-30 23:13 ` One Thousand Gnomes
[not found] ` <20141030231310.0b65b762-mUKnrFFms3BCCTY1wZZT65JpZx93mCW/@public.gmane.org>
2014-10-31 10:58 ` Karol Lewandowski
2014-10-30 23:39 ` Paul Moore
2014-10-31 14:21 ` Karol Lewandowski
2014-10-31 16:36 ` [RFC PATCH 0/5] kdbus: add support for lsm Karol Lewandowski
2014-10-31 16:36 ` [PATCH 1/5] kdbus: extend structures with security pointer " Karol Lewandowski
[not found] ` <1414773397-26490-2-git-send-email-k.lewandowsk-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2014-11-17 1:47 ` Karol Lewandowski
2014-11-17 18:37 ` Greg KH
2014-10-31 16:36 ` [PATCH 2/5] security: export security_file_receive for modules Karol Lewandowski
2014-10-31 16:36 ` [PATCH 3/5] kdbus: check if lsm permits installing received fds Karol Lewandowski
[not found] ` <1414773397-26490-1-git-send-email-k.lewandowsk-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2014-10-31 16:36 ` [PATCH 4/5] security: introduce lsm hooks for kdbus Karol Lewandowski
2014-10-31 16:36 ` [PATCH 5/5] kdbus: make use of new lsm hooks Karol Lewandowski
2014-10-31 17:19 ` [PATCH 3/5] kdbus: check if lsm permits installing received fds Karol Lewandowski
2014-11-07 18:01 ` [RFC PATCH 0/5] kdbus: add support for lsm Greg KH
[not found] ` <20141107180120.GA15387-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2014-11-09 0:07 ` Karol Lewandowski
2014-11-02 1:21 ` [PATCH 00/12] Add kdbus implementation Greg Kroah-Hartman
[not found] ` <20141102012130.GA9335-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2014-11-03 14:38 ` One Thousand Gnomes
2014-10-30 8:33 ` Arnd Bergmann
2014-10-30 16:17 ` Greg Kroah-Hartman
2014-10-29 22:00 ` kdbus: add driver skeleton, ioctl entry points and utility functions Greg Kroah-Hartman
[not found] ` <1414620056-6675-4-git-send-email-gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>
2014-10-30 3:50 ` Eric W. Biederman
2014-10-30 23:45 ` Thomas Gleixner
2014-10-31 0:23 ` Jiri Kosina
[not found] ` <alpine.LRH.2.00.1410310114290.11562-1ReQVI26iDCaZKY3DrU6dA@public.gmane.org>
2014-10-31 0:42 ` Thomas Gleixner
2014-10-29 22:00 ` kdbus: add connection, queue handling and message validation code Greg Kroah-Hartman
[not found] ` <87k33iw759.fsf@x220.int.ebiederm.org>
[not found] ` <87k33iw759.fsf-JOvCrm2gF+uungPnsOpG7nhyD016LWXt@public.gmane.org>
2014-10-30 3:55 ` Andy Lutomirski
2014-10-30 9:06 ` Djalal Harouni
2014-10-29 22:00 ` kdbus: add code to gather metadata Greg Kroah-Hartman
[not found] ` <1414620056-6675-7-git-send-email-gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>
2014-10-29 22:33 ` Andy Lutomirski
[not found] ` <CALCETrWqbpxk83L0k0_78JZCO+ntZhx_hHMcRu=vxs6VE2f5JQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-10-30 0:13 ` Andy Lutomirski
[not found] ` <CALCETrVkuKxMMEw3HBEOZoFUuw8PndXtB13+bLWmcp_E34SaFw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-10-30 8:45 ` Daniel Mack
[not found] ` <5451FA9B.8070501-cYrQPVfZoowdnm+yROfE0A@public.gmane.org>
2014-10-30 14:07 ` Andy Lutomirski
[not found] ` <CALCETrWjOS0AHF33zN0Vy1NC1441To7AgNPge3sKCz8bn2d8gg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-10-30 15:54 ` Daniel Mack
[not found] ` <54525F32.3040502-cYrQPVfZoowdnm+yROfE0A@public.gmane.org>
2014-10-30 21:01 ` Andy Lutomirski
[not found] ` <CALCETrV6MLYUQN6mqZbH=FrLyrETVoemtdC05po8+X=6SKQ70A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-11-01 11:05 ` Daniel Mack
[not found] ` <5454BE6E.5040507-cYrQPVfZoowdnm+yROfE0A@public.gmane.org>
2014-11-01 16:19 ` Andy Lutomirski
[not found] ` <CALCETrXxx4juUGA3mwOxq0BtErM0kj7_THxiO5LwCVLzCXnd2A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-11-03 12:00 ` Simon McVittie
[not found] ` <54576E48.40800-ZGY8ohtN/8pPYcu2f3hruQ@public.gmane.org>
2014-11-03 17:05 ` Andy Lutomirski
2014-10-30 8:09 ` Daniel Mack
2014-10-29 22:00 ` kdbus: add code for notifications and matches Greg Kroah-Hartman
2014-10-29 22:00 ` kdbus: add code for buses, domains and endpoints Greg Kroah-Hartman
[not found] ` <1414620056-6675-9-git-send-email-gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>
2014-10-30 3:59 ` Eric W. Biederman
2014-10-30 9:58 ` Djalal Harouni
2014-10-30 12:15 ` Eric W. Biederman
[not found] ` <87wq7hiwjb.fsf-JOvCrm2gF+uungPnsOpG7nhyD016LWXt@public.gmane.org>
2014-10-30 14:48 ` Djalal Harouni
2014-10-30 14:58 ` Andy Lutomirski
2014-10-30 18:08 ` Djalal Harouni
2014-10-30 18:46 ` Simon McVittie
[not found] ` <54528798.40107-ZGY8ohtN/8pPYcu2f3hruQ@public.gmane.org>
2014-11-05 19:59 ` Djalal Harouni
2014-10-30 20:37 ` Andy Lutomirski
2014-10-30 21:47 ` Alex Elsayed
2014-10-30 22:00 ` Andy Lutomirski
2014-10-30 23:38 ` How Not To Use kref (was Re: kdbus: add code for buses, domains and endpoints) Al Viro
[not found] ` <20141030233801.GF7996-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org>
2014-10-31 18:00 ` Linus Torvalds
[not found] ` <CA+55aFxB=jWGvPH3TMhB=ungOg9TBai5Ak-ma5vChBB-H2AgnQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-10-31 19:56 ` Al Viro
2014-11-04 9:11 ` David Herrmann
2014-10-31 1:39 ` kdbus: add code for buses, domains and endpoints Al Viro
[not found] ` <20141031013922.GG7996-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org>
2014-10-31 9:55 ` Daniel Mack
2014-10-29 22:00 ` kdbus: add name registry implementation Greg Kroah-Hartman
2014-10-29 22:00 ` kdbus: add policy database implementation Greg Kroah-Hartman
2014-10-29 22:00 ` kdbus: add Makefile, Kconfig and MAINTAINERS entry Greg Kroah-Hartman
2014-10-29 22:00 ` kdbus: add selftests Greg Kroah-Hartman
[not found] ` <1414620056-6675-13-git-send-email-gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>
2014-10-30 8:31 ` Arnd Bergmann
2014-11-14 3:42 ` Michael Ellerman
2014-11-14 8:56 ` Daniel Mack
2014-10-29 22:15 ` [PATCH 00/12] Add kdbus implementation Andy Lutomirski
[not found] ` <CALCETrWrxc8foPYbRPtxwNX0sHK_=vLFLDXXyXu+2U2=B+=qCQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-10-29 22:27 ` Greg Kroah-Hartman
2014-10-29 22:34 ` Andy Lutomirski
[not found] ` <20141029222729.GB8129-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2014-10-30 2:27 ` Andy Lutomirski
[not found] ` <CALCETrVxvF2ie=vVgpjeqikn+nci_9jyKfU4s3t=4cjyNZNaNQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-10-30 4:20 ` Eric W. Biederman
[not found] ` <87bnourxx4.fsf-JOvCrm2gF+uungPnsOpG7nhyD016LWXt@public.gmane.org>
2014-10-30 10:15 ` Tom Gundersen
[not found] ` <CAG-2HqUChohNrRSdXzckSiv8ZUYwFLMvRTc41Uo7-b-qmkSFMQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-10-30 12:02 ` Eric W. Biederman
2014-10-30 13:48 ` Andy Lutomirski
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