From: Nicholas Piggin <npiggin@gmail.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: Nicholas Piggin <npiggin@gmail.com>
Subject: [PATCH 1/3] powerpc/64s/hash: Fix stab_rr off by one initialization
Date: Wed, 29 Aug 2018 02:57:29 +1000 [thread overview]
Message-ID: <20180828165731.24320-2-npiggin@gmail.com> (raw)
In-Reply-To: <20180828165731.24320-1-npiggin@gmail.com>
This causes SLB alloation to start 1 beyond the start of the SLB.
There is no real problem because after it wraps it stats behaving
properly, it's just surprisig to see when looking at SLB traces.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/mm/slb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/mm/slb.c b/arch/powerpc/mm/slb.c
index 9f574e59d178..2f162c6e52d4 100644
--- a/arch/powerpc/mm/slb.c
+++ b/arch/powerpc/mm/slb.c
@@ -355,7 +355,7 @@ void slb_initialize(void)
#endif
}
- get_paca()->stab_rr = SLB_NUM_BOLTED;
+ get_paca()->stab_rr = SLB_NUM_BOLTED - 1;
lflags = SLB_VSID_KERNEL | linear_llp;
vflags = SLB_VSID_KERNEL | vmalloc_llp;
--
2.18.0
next prev parent reply other threads:[~2018-08-28 16:57 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-28 16:57 [PATCH 0/3] misc SLB patches Nicholas Piggin
2018-08-28 16:57 ` Nicholas Piggin [this message]
2018-08-28 16:57 ` [PATCH 2/3] powerpc/64s/hash: Use POWER9 SLBIA IH=3 variant in switch_mm Nicholas Piggin
2018-08-28 16:57 ` [PATCH 3/3] powerpc/64s/hash: avoid the POWER5 < DD2.1 slb invalidate workaround on POWER8/9 Nicholas Piggin
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