linux-kernel - Re: BUG: about flush TLB during unmapping a page in memory subsystem

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Message-ID: <4df04b840610192210x3d7de930k7be7dbf9e38819bd@mail.gmail.com>
Date:	Fri, 20 Oct 2006 13:10:45 +0800
From:	"yunfeng zhang" <zyf.zeroos@...il.com>
To:	"David Miller" <davem@...emloft.net>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: BUG: about flush TLB during unmapping a page in memory subsystem

Maybe, the solution is below

...
// >>> ptep_clear((__vma)->vm_mm, __address, __ptep);
// >>> flush_tlb_page(__vma, __address);
// >>> __ptep;
...

And even so, we also get a pte with present = 0 AND its dirty = 1, an odd pte.

Remember B dirtied the pte before A executes flush_tlb_page.
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