Messages in this thread |  | | From | "Peter T. Breuer" <> | Subject | Re: (fwd) Re: [RFC] mount flag "direct" | Date | Fri, 6 Sep 2002 10:57:52 +0200 (MET DST) |
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"Anton Altaparmakov wrote:" > [DanP] > >He was going to go hack the vfs, so in his mind, practical issues of how the > >vfs works now aren't an obstacle. The only mistake he's making is seriously > >underestimating how much effort is required to learn enough to do this kind > >of surgery and have a remote chance that the patient will survive. > > Ok so he plans to rewrite the whole I/O subsystem starting from block up to > FS drivers and VFS. Great. See him again in 10 years... And his changes
I've had a look now. I concur that e2fs at least is full of assumptions that it has various different sorts of metadata in memory at all times. I can't rewrite that, or even add a "warning will robinson" callback to vfs, as I intended. What I can do, I think, is ..
.. simply do a dput of the fs root directory from time to time, from vfs - whenever I think it is appropriate. As far as I can see from my quick look that may cause the dcache path off that to be GC'ed. And that may be enough to do a few experiments for O_DIRDIRECT.
Is that (approx) correct?
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