linux-ext4 - Re: Interface for the new fallocate() system call

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Message-ID: <20070420145918.GY355@devserv.devel.redhat.com>
Date:	Fri, 20 Apr 2007 10:59:18 -0400
From:	Jakub Jelinek <jakub@...hat.com>
To:	"Amit K. Arora" <aarora@...ux.vnet.ibm.com>
Cc:	Andreas Dilger <adilger@...sterfs.com>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-ext4@...r.kernel.org, xfs@....sgi.com, cmm@...ibm.com,
	suparna@...ibm.com, Andrew Morton <akpm@...ux-foundation.org>,
	torvalds@...ux-foundation.org
Subject: Re: Interface for the new fallocate() system call

On Fri, Apr 20, 2007 at 07:21:46PM +0530, Amit K. Arora wrote:
> Ok.
> In this case we may have to consider following things:
> 
> 1) Obviously, for this glibc will have to call fallocate() syscall with
> different arguments on s390, than other archs. I think this should be
> doable and should not be an issue with glibc folks (right?).

glibc can cope with this easily, will just add
sysdeps/unix/sysv/linux/s390/fallocate.c or something similar to override
the generic Linux implementation.

> 2) we also need to see how strace behaves in this case. With little
> knowledge that I have of strace, I don't think it should depend on
> argument ordering of a system call on different archs (since it uses
> ptrace internally and that should take care of it). But, it will be
> nice if someone can confirm this.

strace would solve this with #ifdef mess, it already does that in many
places so guess another few lines don't make it significantly worse.

	Jakub
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