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Re: AMAP_SHARED (was Re: XIP)
On Thu, Nov 04, 2010 at 01:36:15AM +0900, Masao Uebayashi wrote:
> I have found that XIP is very similar to AMAP_SHARED, at the point
> where XIP supports "write" operation.
> Imagine a FlashROM page is XIP'ed and shared as vnode by processes.
> The user rewrite the firmware written onto the FlashROM. To keep
> processes running, we need to copy the XIP pages into RAM (page
> cache), put those pages into the vnode, then notify processes to
> update their VA. This is another kind of COW, done in another
s/VA/PV/. VA stays same.
> Of course, we need PV tracking here.
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