Re: [PATCH] powerpc/mm: Always invalidate tlb on hpte invalidate and update
From: Michael Ellerman <hidden>
Date: 2013-06-01 11:19:08
On Fri, May 31, 2013 at 04:33:24PM +0530, Aneesh Kumar K.V wrote:
From: "Aneesh Kumar K.V" <redacted> If a hash bucket gets full, we "evict" a more/less random entry from it. When we do that we don't invalidate the TLB (hpte_remove) because we assume the old translation is still technically "valid". This implies that when we are invalidating or updating pte, even if HPTE entry is not valid we should do a tlb invalidate. Signed-off-by: Aneesh Kumar K.V <redacted>
Has this always been a bug? I assume not. I'm asking because I have a kernel that's crashing and I'm wondering if I might need this commit. cheers