linux-kernel - RE: POSIX_FADV

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Message-ID: <70D00C33FCD1FD4A860DEAC228277C0C048425EA@MTNMAIL1.mtn.co.za>
Date:	Thu, 14 Aug 2008 12:26:28 +0200
From:	"Trevor Woollacott [ MTN - Innovation Centre ]" <Woolla_T@....co.za>
To:	"Andrew Morton" <akpm@...ux-foundation.org>
Cc:	<linux-kernel@...r.kernel.org>
Subject: RE: POSIX_FADV_DONTNEED


Thanks for the response Andrew. Is there a way to check when the cached
data has been freed after fadvise has been called?

-----Original Message-----
From: Andrew Morton [mailto:akpm@...ux-foundation.org] 
Sent: Thursday, 14 August 2008 11:17 AM
To: Trevor Woollacott [ MTN - Innovation Centre ]
Cc: linux-kernel@...r.kernel.org
Subject: Re: POSIX_FADV_DONTNEED

On Fri, 1 Aug 2008 17:05:39 +0200 "Trevor Woollacott [ MTN - Innovation
Centre ]" <Woolla_T@....co.za> wrote:

> 
> Hi all
> 
> Does anyone know if posix_fadvise() with POSIX_FADV_DONTNEED is
> blocking/unblocking?

It tries to be nonblocking and will mostly succeed in that.  It might
occasionally block on a metadata read or journal congestion or
something, so it isn't guaranteed.


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