lkml.org 
[lkml]   [2004]   [Aug]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: POSIX_FADV_NOREUSE and O_STREAMING behavior in 2.6.7
Trond Myklebust wrote:

>På to , 26/08/2004 klokka 14:38, skreiv David Greaves:
>
>
>>David Rolenc wrote:
>>
>>
>>
>>>I am trying to get O_STREAMING (Robert Love patch for 2.4) behavior in
>>>2.6 and just a glance at fadvise.c suggests that POSIX_FADV_NOREUSE is
>>>not implemented any differently than POSIX_FADV_WILLNEED. Am I missing
>>>something? I want to read data from disk with readahead and drop the
>>>data from the page cache as soon as I am done with it. Do I have to
>>>call fadvise with POSIX_FADV_DONTNEED after every read?
>>>
>>>
>>And will this work over nfs?
>>
>>
>
>What do you mean?
>
>The client will of course respect fadvise() if the generic VM code
>supports it, but there is no NFS protocol support for this, so the
>client is not able to communicate your fadvise call on to the server.
>
>
Perfect answer
thank you

I want my nfs client to communicate this to my nfs server. Thus avoiding
my nfs server having a cache of useless video.
I can see this becoming an important benefit for video distribution (an
area linux is likely to see more of)

David

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 14:05    [W:0.054 / U:0.332 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site