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Re: [PATCH] new interface: memory_object_get_proxy

From: Samuel Thibault
Subject: Re: [PATCH] new interface: memory_object_get_proxy
Date: Sat, 30 Oct 2021 15:27:00 +0200
User-agent: NeoMutt/20170609 (1.8.3)

Joan Lledó, le sam. 30 oct. 2021 08:38:23 +0200, a ecrit:
> > I don't think you can access the entry once you've unlocked the map.
> > 
> You're probably right b/c it doesn't seem the entry is being accessed after
> the lock release in any other place of the code.

You have to, yes. The problem is what if another threads tries to unmap
the address range concurrently. You want to keep the lock held until
you acquired a ref on the memory object. Then you are safe: the ref
guarantees that the memory object won't disappear. And from the rest of
the discussion it seems you indeed need such a ref, which you'll just
transfer to the creation of the proxy.


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