On Thu, Jun 10, 2004 at 11:29:41 -0500, Timur Tabi wrote: > I'm trying to figure out what kind of memory I can call > SetPageReserved() on. Is it okay to use it on memory obtained via a > kiobuf? I get the feeling that SetPageReserved() should only be used on > memory that is allocated in the kernel itself, such as a DMA buffer > allocated via kmalloc(), and never on memory that is allocated by a user > process (which is what kiobuf gives me). Is that correct? > > The problem we're seeing is that the VM is swapping out pages obtained > via a kiobuf. We can't use lock_kiobuf() because sometimes the memory > regions overlap, and lock_kiobuf() rejects attempts to lock memory that > already has at least one locked page. The great thing about Linux is, that you have the source. Use it! Read how lock_kiobuf works and write your own function that will do relevant counting on how many kiobufs you have that page. ------------------------------------------------------------------------------- Jan 'Bulb' Hudec <bulb@ucw.cz>
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