Date: Mon, 1 Dec 1997 15:51:16 -0600 From: Jonathan Lemon <jlemon@americantv.com> To: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> Cc: John Dyson <dyson@freebsd.org>, current@freebsd.org Subject: Re: cvs commit: src/sys/kern vfs_aio.c Message-ID: <19971201155116.18825@right.PCS> In-Reply-To: <199712012017.PAA01433@khavrinen.lcs.mit.edu>; from Garrett Wollman on Dec 12, 1997 at 03:17:41PM -0500 References: <199712011841.KAA14631@freefall.freebsd.org> <199712012017.PAA01433@khavrinen.lcs.mit.edu>
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On Dec 12, 1997 at 03:17:41PM -0500, Garrett Wollman wrote: > <<On Mon, 1 Dec 1997 10:41:09 -0800 (PST), John Dyson <dyson@FreeBSD.ORG> said: > > > Fix a problem when creating a new kernel thread. In some cases, aio_read > > or aio_write can return the pid of the new thread. This is due to the > > way that return values from system calls being passed by side-effect in > > the proc structure now. This commit fixes the problem with aio_read and > > aio_write. > > This is an example of why said change was a mistake... I never did get around to asking, so I guess this might be a good time as any; why were the retvals moved into the proc structure in the first place? I assume for performance reasons, but I don't recall seeing any discussion about it on the lists. -- Jonathan
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