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From: Smit Shah <getsmit@gmail.com>
To: linux-xfs@oss.sgi.com
Subject: Re: XFS Preallocate using ALLOCSP
Date: Mon, 15 Jun 2009 19:00:51 -0700 (PDT)	[thread overview]
Message-ID: <24046118.post@talk.nabble.com> (raw)
In-Reply-To: <24042506.post@talk.nabble.com>


Ok i did the first part i.e preallocation using xfsctl() by using
setresgid().
But still is there some way this option could be incorporated in the
fallocate system call.

Smit Shah wrote:
> 
> Hi, 
> 
> I wanted to preallocate the file using the ALLOCSP so that the
> preallocated space is zeroed out. Hence i used the xfsctl but the problem
> is that i cannot execute  it as a non-root user.  So i tried using
> fallocate but when i saw the xfs implementation of kernel it uses the
> RESVP cmd and  since the unwritten flag is set i am assuming that the
> performance of writing to the preallocated space will suffer because of
> the metadata updates. So is there a way to preallocate using ALLOCSP as a
> non-root user or else i would be required to modify the kernel ??
> 
> TIA, 
> Smit 
> 

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  reply	other threads:[~2009-06-16  2:00 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-06-16  0:18 XFS Preallocate using ALLOCSP Smit Shah
2009-06-16  2:00 ` Smit Shah [this message]
2009-06-16  3:34 ` Eric Sandeen
2009-06-16  6:44   ` Smit Shah
2009-06-16  7:34     ` Smit Shah
2009-06-16 15:16     ` Eric Sandeen
2009-06-16 16:42       ` Felix Blyakher
2009-06-16 17:28         ` Smit Shah
2009-06-16 17:32           ` Eric Sandeen
2009-06-16 21:38             ` Smit Shah
2009-06-17  1:04               ` Michael Monnerie
2009-06-16 17:41           ` Felix Blyakher
2009-06-16 21:42             ` Smit Shah
2009-06-16 22:05               ` Eric Sandeen
2009-06-16 22:32                 ` Felix Blyakher
2009-06-16 22:19               ` Smit Shah
2009-06-16 22:26               ` Felix Blyakher

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