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From: Eugene Surovegin <ebs@ebshome.net>
To: Tom Rini <trini@kernel.crashing.org>
Cc: linuxppc-embedded@lists.linuxppc.org
Subject: Re: [RFC] consistent_sync and non L1 cache line aligned buffers
Date: Tue, 15 Jul 2003 09:20:24 -0700	[thread overview]
Message-ID: <5.1.0.14.2.20030715091031.029e37b0@mail.ebshome.net> (raw)
In-Reply-To: <20030715154656.GQ1211@ip68-0-152-218.tc.ph.cox.net>


At 08:46 AM 7/15/2003, Tom Rini wrote:
>Well, one thing that is worth noting is that the USB people knew this
>was a problem, and it was / should have been fixed in the 2.5 cycle.
>Similarly, SCSI was cleaned up a lot, so perhaps this has been fixed
>there.  I think it's generally known that doing DMA off of the stack is
>a bad idea, and should be fixed when found.

I agree this is VERY bad idea but the fact is that there is a code which
does such nasty things.

I truly hope all this will/was fixed in 2.5 but frankly I wouldn't be so
sure :)

Unfortunately, for production 2.5 is unusable and will be for some time.
A lot of people (I think majority) still use 2.4. And 2.4 (as of
2.4.22-pre6) is still broken in this respect...

Eugene


** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

  reply	other threads:[~2003-07-15 16:20 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-07-15  4:32 [RFC] consistent_sync and non L1 cache line aligned buffers Eugene Surovegin
2003-07-15 15:46 ` Tom Rini
2003-07-15 16:20   ` Eugene Surovegin [this message]
2003-07-15 16:25     ` Tom Rini
2003-07-15 16:17 ` Matt Porter
2003-07-15 16:27   ` Eugene Surovegin
2003-07-15 18:11     ` PPCBoot on Ebony board Brian Padalino
2003-07-15 21:32       ` Chris Zimman
2003-07-16 11:59         ` Brian Padalino
2003-07-16 14:29           ` Chris Zimman
2003-07-16 15:39             ` Brian Padalino
2003-07-16 14:45           ` Roland Dreier
2003-07-15 23:51     ` [RFC] consistent_sync and non L1 cache line aligned buffers Matt Porter
2003-07-15 20:18 Darin.Johnson
     [not found] <F0B628F30F48064289D8CCC1EE21B7A80C48A5@mvebe001.americas.n okia.com>
2003-07-15 20:39 ` Eugene Surovegin
2003-07-15 21:26   ` David Blythe
2003-07-15 22:15     ` Dan Malek
2003-07-15 20:47 Darin.Johnson
2003-07-15 23:04 Darin.Johnson
2003-07-15 23:34 ` Paul Mackerras
2003-07-15 23:50   ` Eugene Surovegin
2003-07-15 23:45 ` Matt Porter
2003-07-16 14:01 ` Dan Malek
2003-07-16  0:12 Darin.Johnson

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