linux-kernel - Re: [PATCH 2 of 4] Introduce i386 fibril scheduling

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Message-ID: <6f703f960702061724o51e2cdadi28ae367c2b3029cb@mail.gmail.com>
Date:	Tue, 6 Feb 2007 16:24:37 -0900
From:	"Kent Overstreet" <kent.overstreet@...il.com>
To:	"Davide Libenzi" <davidel@...ilserver.org>
Cc:	"Joel Becker" <Joel.Becker@...cle.com>,
	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Zach Brown" <zach.brown@...cle.com>,
	"Ingo Molnar" <mingo@...e.hu>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	linux-aio@...ck.org, "Suparna Bhattacharya" <suparna@...ibm.com>,
	"Benjamin LaHaise" <bcrl@...ck.org>
Subject: Re: [PATCH 2 of 4] Introduce i386 fibril scheduling

> If that's what is wanted, then the async_submit() API can detect the
> syncronous completion soon, and drop a result inside the result-queue
> immediately. It means that an immediately following async_wait() will find
> some completions soon. Or:
>
> struct async_submit {
>         void *cookie;
>         int sysc_nbr;
>         int nargs;
>         long args[ASYNC_MAX_ARGS];
> };
> struct async_result {
>         void *cookie;
>         long result:
> };
>
> int async_submit(struct async_submit *a, struct async_result *r, int n);
>
> Where "r" will store the ones that completed syncronously. I mean, there
> are really many ways to do this.

That interface (modifying async_submit to pass in the size of the
result array) would work great.
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