Messages in this thread | | | From | "Peter T. Breuer" <> | Subject | Re: block device/VM question | Date | Tue, 27 Aug 2002 18:57:16 +0200 (MET DST) |
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"A month of sundays ago Thunder from the hill wrote:" > On Tue, 27 Aug 2002, Peter T. Breuer wrote: > > > Why so rough? > > > > Rough? You mean "approximate"? I was working from my vague mamory of > > what I read in the code on the train this morning. > > No, rough. I meant, why not use sys_open()?
You mean do a syscall with flags O_DIRECT from within the driver? I don't like syscalsl from kernel code, but if you say so, I'll think about it.
> Certainly not, as I'm not using libc6. But my manpages are newer, the > latest version is appended. It might clear this issue to you.
Thanks.
> > Oh, well, thanks.I suppose you won't give me a recipe saying "do this > > and your device won't be cached", but I'll follow the lead. > > I can't, because I don't have your code here and can't tell your needs. I > just try to serve it all. (I mean it all depends not just on where you go, > but also on what you have.)
Mmm .. I must say I don't see how. Making all requests on a block device not be cached by VMS seems to me to have a globally defined semantics, not confined to my particular use or context! Are you suggesting that it depends on the mode of access to the device? That I can't control - I simply want ALL accesses to not be cached.
Peter
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