RE: POSIX_FADV_DONTNEED

[Trevor Woollacott [ MTN - Innovation Centre ]]

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@xxxxxxxxxxxxxxxxxxxx] 
Sent: Thursday, 14 August 2008 11:17 AM
To: Trevor Woollacott [ MTN - Innovation Centre ]
Cc: linux-kernel@xxxxxxxxxxxxxxx
Subject: Re: POSIX_FADV_DONTNEED

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