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SubjectRe: block device/VM question
Hi,

On Tue, 27 Aug 2002, Peter T. Breuer wrote:
> Is there any way of turning off VMS caching for a block device?
>
> I want all reads to come down to the driver, where I decide what to do
> about them. I don't want reads to read locally cached buffers in VMS
> unless I say so. The reason is that the device might have a remote
> writer.
>
> I'll have a look at the raw character device later (but I recall
> having looked before without it telling me anything - probably
> they make a fake request and transfer it to the device queue
> directly and treat the return with their own substituted end_req).
> I need a block device - I can't mount a character device. Now
> there's an idea! A mouse represented as a file system ..

O_DIRECT, or easily set the buffer to zero...

Thunder
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