* Question about backing store access rights
@ 2007-02-20 10:07 Christian Kandeler
2007-02-20 10:42 ` Christian Kandeler
0 siblings, 1 reply; 2+ messages in thread
From: Christian Kandeler @ 2007-02-20 10:07 UTC (permalink / raw)
To: linux-ia64
Hello,
I hope that someone can enlighten me about how the mapping of a process' RSE
backing store page is supposed to work.
From what I can see, the area gets initialized in the ia64_init_addr_space()
function, where its vm_page_prot member is set to __P011, i.e. PAGE_READONLY,
which I assume is supposed to be changed on the first write access. However,
according to the IASDM, RSE stores always set ISR.w to zero on an
interruption, so the page fault handler will never know that it's dealing
with a write access. Consequently, processes should end up in an endless loop
of IR Data Access Rights faults. Why don't they? What am I missing here?
Thanks,
Christian
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Question about backing store access rights
2007-02-20 10:07 Question about backing store access rights Christian Kandeler
@ 2007-02-20 10:42 ` Christian Kandeler
0 siblings, 0 replies; 2+ messages in thread
From: Christian Kandeler @ 2007-02-20 10:42 UTC (permalink / raw)
To: linux-ia64
Christian Kandeler wrote:
> [nonsense]
Please disregard. Sorry.
^ permalink raw reply [flat|nested] 2+ messages in thread
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