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>,
Florian Weimer <fweimer@redhat•com>
Subject: [PATCH 2/5] powerpc/64s/hash: Allow MAP_FIXED allocations to cross 128TB boundary
Date: Mon, 6 Nov 2017 21:03:12 +1100 [thread overview]
Message-ID: <20171106100315.29720-3-npiggin@gmail.com> (raw)
In-Reply-To: <20171106100315.29720-1-npiggin@gmail.com>
While mapping hints with a length that cross 128TB are disallowed,
MAP_FIXED allocations that cross 128TB are allowed. These are failing
on hash (on radix they succeed). Add an additional case for fixed
mappings to expand the addr_limit when crossing 128TB.
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux•vnet.ibm.com>
Fixes: f4ea6dcb08 ("powerpc/mm: Enable mappings above 128TB")
Signed-off-by: Nicholas Piggin <npiggin@gmail•com>
---
arch/powerpc/mm/slice.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/mm/slice.c b/arch/powerpc/mm/slice.c
index 567db541c0a1..f980397b449d 100644
--- a/arch/powerpc/mm/slice.c
+++ b/arch/powerpc/mm/slice.c
@@ -419,7 +419,8 @@ unsigned long slice_get_unmapped_area(unsigned long addr, unsigned long len,
/*
* Check if we need to expland slice area.
*/
- if (unlikely(addr > mm->context.addr_limit &&
+ if (unlikely(((addr > mm->context.addr_limit) ||
+ (fixed && addr + len > mm->context.addr_limit)) &&
mm->context.addr_limit != TASK_SIZE)) {
mm->context.addr_limit = TASK_SIZE;
on_each_cpu(slice_flush_segments, mm, 1);
--
2.15.0
next prev parent reply other threads:[~2017-11-06 10:03 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-06 10:03 [PATCH 0/5] VA allocator fixes Nicholas Piggin
2017-11-06 10:03 ` [PATCH 1/5] powerpc/64s/hash: Fix 128TB-512TB virtual address boundary case allocation Nicholas Piggin
2017-11-06 10:38 ` Aneesh Kumar K.V
2017-11-06 10:54 ` Nicholas Piggin
2017-11-06 11:05 ` Aneesh Kumar K.V
2017-11-06 11:21 ` Nicholas Piggin
2017-11-07 2:00 ` Aneesh Kumar K.V
2017-11-07 2:03 ` Nicholas Piggin
2017-11-06 10:03 ` Nicholas Piggin [this message]
2017-11-06 10:44 ` [PATCH 2/5] powerpc/64s/hash: Allow MAP_FIXED allocations to cross 128TB boundary Aneesh Kumar K.V
2017-11-06 11:55 ` Nicholas Piggin
2017-11-07 2:28 ` Michael Ellerman
2017-11-07 2:52 ` Nicholas Piggin
2017-11-06 10:03 ` [PATCH 3/5] powerpc/64s/hash: Fix fork() with 512TB process address space Nicholas Piggin
2017-11-06 10:44 ` Aneesh Kumar K.V
2017-11-06 10:03 ` [PATCH 4/5] powerpc/64s/radix: Fix 128TB-512TB virtual address boundary case allocation Nicholas Piggin
2017-11-06 11:14 ` Aneesh Kumar K.V
2017-11-06 11:42 ` Nicholas Piggin
2017-11-06 10:03 ` [PATCH 5/5] powerpc/64s: mm_context.addr_limit is only used on hash Nicholas Piggin
2017-11-06 15:16 ` [PATCH 0/5] VA allocator fixes Florian Weimer
2017-11-07 0:06 ` Nicholas Piggin
2017-11-07 1:59 ` Aneesh Kumar K.V
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