Messages in this thread |  | | Date | Tue, 3 Sep 2002 13:33:20 -0300 (BRT) | From | Rik van Riel <> | Subject | Re: [RFC] mount flag "direct" (fwd) |
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On Tue, 3 Sep 2002, Peter T. Breuer wrote:
> > How does the other user's of this device "know" that there is > > a new file so it can update its notion of the block-device state? > > The block device itself is stateless at the block level. Every block > access goes "direct to the metal". > > The question is how much FS state is cached on either kernel. > If it is too much, then I will ask how I can cause to be less, perhaps > by use of a flag that parallels how O_DIRECT works. I thought that new > files were entries in a directories inode and I agree that inodes are > held in memory! But I don't know when they are first read or reread.
And neither can you know. After all, this is filesystem dependant.
You cannot decide whether filesystem-independant clustering is possible unless you know that all the filesystems play by your rules. So much for filesystem-independance.
regards,
Rik -- http://www.linuxsymposium.org/2002/ "You're one of those condescending OLS attendants" "Here's a nickle kid. Go buy yourself a real t-shirt"
http://www.surriel.com/ http://distro.conectiva.com/
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