The patch titled
Subject: riscv/vdso: don't clear PG_reserved
has been added to the -mm tree. Its filename is
riscv-vdso-dont-clear-pg_reserved.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/riscv-vdso-dont-clear-pg_reserved.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/riscv-vdso-dont-clear-pg_reserved.patch
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------------------------------------------------------
From: David Hildenbrand <david@xxxxxxxxxx>
Subject: riscv/vdso: don't clear PG_reserved
The VDSO is part of the kernel image and therefore the struct pages are
marked as reserved during boot.
As we install a special mapping, the actual struct pages will never be
exposed to MM via the page tables. We can therefore leave the pages
marked as reserved.
Link: http://lkml.kernel.org/r/20190114125903.24845-5-david@xxxxxxxxxx
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
Acked-by: Palmer Dabbelt <palmer@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Cc: Palmer Dabbelt <palmer@xxxxxxxxxx>
Cc: Albert Ou <aou@xxxxxxxxxxxxxxxxx>
Cc: Tobias Klauser <tklauser@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/riscv/kernel/vdso.c | 1 -
1 file changed, 1 deletion(-)
--- a/arch/riscv/kernel/vdso.c~riscv-vdso-dont-clear-pg_reserved
+++ a/arch/riscv/kernel/vdso.c
@@ -54,7 +54,6 @@ static int __init vdso_init(void)
struct page *pg;
pg = virt_to_page(vdso_start + (i << PAGE_SHIFT));
- ClearPageReserved(pg);
vdso_pagelist[i] = pg;
}
vdso_pagelist[i] = virt_to_page(vdso_data);
_
Patches currently in -mm which might be from david@xxxxxxxxxx are
mm-balloon-update-comment-about-isolation-migration-compaction.patch
mm-convert-pg_balloon-to-pg_offline.patch
kexec-export-pg_offline-to-vmcoreinfo.patch
xen-balloon-mark-inflated-pages-pg_offline.patch
hv_balloon-mark-inflated-pages-pg_offline.patch
vmw_balloon-mark-inflated-pages-pg_offline.patch
vmw_balloon-mark-inflated-pages-pg_offline-v2.patch
pm-hibernate-use-pfn_to_online_page.patch
pm-hibernate-exclude-all-pageoffline-pages.patch
pm-hibernate-exclude-all-pageoffline-pages-v2.patch
agp-efficeon-no-need-to-set-pg_reserved-on-gatt-tables.patch
s390-vdso-dont-clear-pg_reserved.patch
powerpc-vdso-dont-clear-pg_reserved.patch
riscv-vdso-dont-clear-pg_reserved.patch
m68k-mm-use-__clearpagereserved.patch
arm64-kexec-no-need-to-clearpagereserved.patch
arm64-kdump-no-need-to-mark-crashkernel-pages-manually-pg_reserved.patch
ia64-perfmon-dont-mark-buffer-pages-as-pg_reserved.patch
mm-better-document-pg_reserved.patch
