From: Stefani Seibold <stefani@seibold.net>
To: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>,
linux-kernel@vger.kernel.org, akpm@osdl.org
Subject: Re: [PATCH] [6/6] kfifo: Document everywhere that size has to be power of two
Date: Sun, 27 Dec 2009 23:23:31 +0100 [thread overview]
Message-ID: <1261952611.25298.37.camel@wall-e> (raw)
In-Reply-To: <20091227221438.GA16353@core.coreip.homeip.net>
Am Sonntag, den 27.12.2009, 14:14 -0800 schrieb Dmitry Torokhov:
> On Sun, Dec 27, 2009 at 10:50:32PM +0100, Stefani Seibold wrote:
> > Am Sonntag, den 27.12.2009, 22:03 +0100 schrieb Andi Kleen:
> > > On my first try using them I missed that the fifos need to
> > > be power of two, resulting in a runtime bug. Document that requirement
> > > everywhere (and fix one grammar bug)
> > >
> > > Signed-off-by: Andi Kleen <ak@linux.intel.com>
> > >
> >
> > Acked: Stefani Seibold <Stefani@Seibold.net>
> >
>
> Now, does it really _have_ to be this way? For record-oriented
> FIFO's it is customary to be 2*pow(n)*sizeof(rec) which is rarely
> 2*pow(m).
>
Right. This is why i wrote the new macro base kfifo API, where i am able
to do this in that way.
Stefani
next prev parent reply other threads:[~2009-12-27 22:23 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-27 21:03 [PATCH] [0/6] kfifo fixes/improvements Andi Kleen
2009-12-27 21:03 ` [PATCH] [1/6] kfifo: Use void * pointers for user buffers Andi Kleen
2009-12-27 21:48 ` Stefani Seibold
2009-12-27 21:03 ` [PATCH] [2/6] kfifo: Make kfifo_in atomic Andi Kleen
2009-12-27 21:46 ` Stefani Seibold
2009-12-27 21:03 ` [PATCH] [3/6] kfifo: Sanitize *_user error handling Andi Kleen
2009-12-27 21:38 ` Stefani Seibold
2009-12-27 23:34 ` Andi Kleen
2009-12-28 7:10 ` Stefani Seibold
2010-01-04 22:33 ` Stefani Seibold
2009-12-27 21:03 ` [PATCH] [4/6] kfifo: add kfifo_out_peek Andi Kleen
2009-12-27 21:49 ` Stefani Seibold
2009-12-27 23:41 ` Andi Kleen
2009-12-28 7:09 ` Stefani Seibold
2010-01-04 21:57 ` Andrew Morton
2010-01-04 22:24 ` Alan Cox
2010-01-04 22:47 ` Stefani Seibold
2010-01-05 0:14 ` Alan Cox
2009-12-27 21:03 ` [PATCH] [5/6] kfifo: Add kfifo_initialized Andi Kleen
2009-12-27 21:53 ` Stefani Seibold
2009-12-27 21:03 ` [PATCH] [6/6] kfifo: Document everywhere that size has to be power of two Andi Kleen
2009-12-27 21:50 ` Stefani Seibold
2009-12-27 22:14 ` Dmitry Torokhov
2009-12-27 22:23 ` Stefani Seibold [this message]
2009-12-27 23:34 ` Andi Kleen
2009-12-27 21:36 ` [PATCH] [0/6] kfifo fixes/improvements Stefani Seibold
2009-12-27 23:38 ` Andi Kleen
2009-12-28 6:49 ` Stefani Seibold
2009-12-28 7:42 ` Stefani Seibold
2009-12-28 14:57 ` Andi Kleen
2009-12-28 16:08 ` Stefani Seibold
2009-12-28 17:26 ` Andi Kleen
2009-12-28 20:04 ` Stefani Seibold
2009-12-28 20:40 ` Andi Kleen
2009-12-29 8:40 ` Stefani Seibold
2009-12-29 22:27 ` Dmitry Torokhov
2009-12-30 1:18 ` Vikram Dhillon
2009-12-30 2:08 ` Dmitry Torokhov
2009-12-30 9:29 ` Stefani Seibold
2009-12-30 10:43 ` Dmitry Torokhov
2009-12-30 10:52 ` Stefani Seibold
2009-12-30 11:07 ` Dmitry Torokhov
2009-12-30 11:32 ` Stefani Seibold
2009-12-30 17:29 ` Andy Walls
2009-12-31 7:35 ` Dmitry Torokhov
2009-12-31 8:59 ` Stefani Seibold
2009-12-31 9:33 ` Dmitry Torokhov
2009-12-31 18:03 ` Andy Walls
2009-12-30 17:15 ` Andy Walls
2009-12-28 0:12 ` Roland Dreier
2009-12-28 1:41 ` Andi Kleen
2009-12-28 7:06 ` Stefani Seibold
2009-12-28 14:56 ` Andi Kleen
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