Subject: Re: kern/15232: ffs_sync writes out read-only pages to disk
To: Bill Sommerfeld <>
From: Thor Lancelot Simon <>
List: tech-kern
Date: 01/13/2002 14:20:37
On Sun, Jan 13, 2002 at 10:32:25AM -0500, Bill Sommerfeld wrote:
> > Surely there is a 'page modified' bit - and the write should only
> > happen if it is modified?
> this may just be updating the vnode 'last access' time.
> if you mount -o noatime,nodevmtime the disk should be more likely to
> spin down.

No such luck here.  With softdep enabled, I have *never* been able to
get any machine's drive to spin down.

 Thor Lancelot Simon	                            
   But as he knew no bad language, he had called him all the names of common
 objects that he could think of, and had screamed: "You lamp!  You towel!  You
 plate!" and so on.              --Sigmund Freud