From: Tom Vier <tmv@comcast.net>
To: Reiserfs List <reiserfs-list@namesys.com>
Subject: Re: write barrier patches for 2.4.21
Date: Wed, 27 Aug 2003 18:03:37 -0400 [thread overview]
Message-ID: <20030827220337.GB4886@zero> (raw)
In-Reply-To: <20030827064103.GA29131@namesys.com>
On Wed, Aug 27, 2003 at 10:41:03AM +0400, Oleg Drokin wrote:
> There was a discussion about that on Kernel Summit 2003 and general opinion was that SCSI
> does not need the WB stuff at all as it does the correct thing anyway.
i found this, but no real details. do you have a better link? or could you
tell me why scsi drives don't need wb's? afaik, they don't have nvram cache.
so, the danger is still there, even if small (unless i'm wrong).
http://lwn.net/Articles/40850/
> But since the the barrier flags are visible in io requests, actual device drivers
> are free to do something when met with barrier requests or to ignore it.
> The only concern is probably raid cards that show bunch of IDE drives as a SCSI device.
anyone who has more info, please post. 8) i'm very interested. too bad there
aren't video streams of lks, like there were in the past.
--
Tom Vier <tmv@comcast.net>
DSA Key ID 0xE6CB97DA
next prev parent reply other threads:[~2003-08-27 22:03 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-25 17:08 write barrier patches for 2.4.21 Gergely Tamas
2003-08-26 8:17 ` Oleg Drokin
2003-08-26 9:03 ` Gergely Tamas
2003-08-26 9:13 ` Oleg Drokin
2003-08-26 9:32 ` Gergely Tamas
2003-08-26 21:46 ` Tom Vier
2003-08-27 6:41 ` Oleg Drokin
2003-08-27 22:03 ` Tom Vier [this message]
2003-08-28 0:37 ` Chris Mason
2003-08-28 17:07 ` Mike Fedyk
2003-08-29 0:07 ` Tom Vier
2003-08-29 1:18 ` Mike Fedyk
2003-08-29 1:44 ` Chris Mason
2003-08-29 1:56 ` Matthias Andree
2003-09-02 22:10 ` Hans Reiser
2003-09-04 14:56 ` Oleg Drokin
-- strict thread matches above, loose matches on Subject: below --
2003-09-04 20:49 Tom Vier
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