linux-kernel - Re: [RFC][Resend] Make NFS-Client readahead tunable

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 18 Sep 2008 00:42:58 -0700 (PDT)
From:	Martin Knoblauch <knobi@...bisoft.de>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Greg Banks <gnb@...bourne.sgi.com>
Cc:	linux-nfs list <linux-nfs@...r.kernel.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC][Resend] Make NFS-Client readahead tunable

----- Original Message ----

> From: Andrew Morton <akpm@...ux-foundation.org>
> To: Greg Banks <gnb@...bourne.sgi.com>
> Cc: Martin Knoblauch <knobi@...bisoft.de>; linux-nfs list <linux-nfs@...r.kernel.org>; linux-kernel@...r.kernel.org
> Sent: Thursday, September 18, 2008 5:13:34 AM
> Subject: Re: [RFC][Resend] Make NFS-Client readahead tunable
> 
> On Thu, 18 Sep 2008 11:42:54 +1000 Greg Banks wrote:
> 
> > I think having a tunable for client readahead is an excellent idea,
> > although not to solve your particular problem.  The SLES10 kernel has a
> > patch which does precisely that, perhaps Neil could post it.
> > 
> > I don't think there's a lot of point having both a module parameter and
> > a sysctl.
> 
> mount -o remount,readahead=42

[root@...dm52 ~]# mount -o remount,readahead=42 /net/spsdms/fs13
Bad nfs mount parameter: readahead
[root@...dm52 ~]# mount -o readahead=42 /net/spsdms/fs13
Bad nfs mount parameter: readahead


 I assume the reply was meant to say that the correct way of introducing a modifyable readahead size is to implement it as a mount option ? :-) I considered it, but it seems to be more intrusive than the workaround patch. It also needs changes to userspace tools - correct?

Cheers
Martin

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