From: Nicholas Piggin <npiggin@gmail.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: Nicholas Piggin <npiggin@gmail.com>,
"Aneesh Kumar K . V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: [PATCH] powerpc/64s/radix: tlb do not flush on page size when fullmm
Date: Wed, 25 Jul 2018 23:58:06 +1000 [thread overview]
Message-ID: <20180725135806.29648-1-npiggin@gmail.com> (raw)
When the mm is being torn down there will be a full PID flush so
there is no need to flush the TLB on page size changes.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/include/asm/tlb.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/powerpc/include/asm/tlb.h b/arch/powerpc/include/asm/tlb.h
index 5d3107f2b014..d1b3dc4a6a0a 100644
--- a/arch/powerpc/include/asm/tlb.h
+++ b/arch/powerpc/include/asm/tlb.h
@@ -84,6 +84,9 @@ static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
static inline void tlb_remove_check_page_size_change(struct mmu_gather *tlb,
unsigned int page_size)
{
+ if (tlb->fullmm)
+ return;
+
if (!tlb->page_size)
tlb->page_size = page_size;
else if (tlb->page_size != page_size) {
--
2.17.0
next reply other threads:[~2018-07-25 13:58 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-25 13:58 Nicholas Piggin [this message]
2018-07-25 14:17 ` [PATCH] powerpc/64s/radix: tlb do not flush on page size when fullmm Aneesh Kumar K.V
2018-08-08 14:25 ` Michael Ellerman
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