linux-kernel - Re: [patch] scsi: revert "[SCSI] Get rid of scsi

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Date:	Tue, 8 Jan 2008 21:01:43 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Stefan Richter <stefanr@...6.in-berlin.de>,
	Matthew Wilcox <matthew@....cx>, Valdis.Kletnieks@...edu,
	Willy Tarreau <w@....eu>, Adrian Bunk <bunk@...nel.org>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	Peter Osterlund <petero2@...ia.com>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Al Viro <viro@....linux.org.uk>
Subject: Re: [patch] scsi: revert "[SCSI] Get rid of scsi_cmnd->done"


* Linus Torvalds <torvalds@...ux-foundation.org> wrote:

> These things *are* fairly rare (most bugs by _far_ are of the trivial 
> stupid kind), but some of those things can stay around for a long 
> time, and it can take months of different people reporting similar 
> problems until somebody finally puts two and two together and sees the 
> pattern.

one common pattern i've noticed is bug dependency. In some areas we need 
to fix a series of 2-3 increasingly less trivial bugs to get enough test 
exposure, tester confidence and developer attention to trigger (and fix) 
the _truly_ bad bugs.

That's why agressive regression elimination (and prevention) is so 
important IMHO - trivial regressions can totally block testing of 
certain areas of code, and with an agressive 90 days release schedule 
every day counts.

	Ingo
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