The patch titled
Subject: x86: mm: don't display pages which aren't present in debugfs
has been added to the -mm tree. Its filename is
x86-mm-dont-display-pages-which-arent-present-in-debugfs.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/x86-mm-dont-display-pages-which-arent-present-in-debugfs.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/x86-mm-dont-display-pages-which-arent-present-in-debugfs.patch
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------------------------------------------------------
From: Steven Price <steven.price@xxxxxxx>
Subject: x86: mm: don't display pages which aren't present in debugfs
For the /sys/kernel/debug/page_tables/ files, rather than outputing a
mostly empty line when a block of memory isn't present just skip the
line. This keeps the output shorter and will help with a future change
switching to using the generic page walk code as we no longer care about
the 'level' that the page table holes are at.
Link: http://lkml.kernel.org/r/20190722154210.42799-15-steven.price@xxxxxxx
Signed-off-by: Steven Price <steven.price@xxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/mm/dump_pagetables.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
--- a/arch/x86/mm/dump_pagetables.c~x86-mm-dont-display-pages-which-arent-present-in-debugfs
+++ a/arch/x86/mm/dump_pagetables.c
@@ -301,8 +301,8 @@ static void note_page(struct seq_file *m
/*
* Now print the actual finished series
*/
- if (!st->marker->max_lines ||
- st->lines < st->marker->max_lines) {
+ if ((cur & _PAGE_PRESENT) && (!st->marker->max_lines ||
+ st->lines < st->marker->max_lines)) {
pt_dump_seq_printf(m, st->to_dmesg,
"0x%0*lx-0x%0*lx ",
width, st->start_address,
@@ -318,7 +318,8 @@ static void note_page(struct seq_file *m
printk_prot(m, st->current_prot, st->level,
st->to_dmesg);
}
- st->lines++;
+ if (cur & _PAGE_PRESENT)
+ st->lines++;
/*
* We print markers for special areas of address space,
_
Patches currently in -mm which might be from steven.price@xxxxxxx are
arc-mm-add-pd_leaf-definitions.patch
arm-mm-add-pd_leaf-definitions.patch
arm64-mm-add-pd_leaf-definitions.patch
mips-mm-add-pd_leaf-definitions.patch
powerpc-mm-add-pd_leaf-definitions.patch
riscv-mm-add-pd_leaf-definitions.patch
s390-mm-add-pd_leaf-definitions.patch
sparc-mm-add-pd_leaf-definitions.patch
x86-mm-add-pd_leaf-definitions.patch
mm-add-generic-pd_leaf-macros.patch
mm-pagewalk-add-p4d_entry-and-pgd_entry.patch
mm-pagewalk-allow-walking-without-vma.patch
mm-pagewalk-add-test_pd-callbacks.patch
x86-mm-dont-display-pages-which-arent-present-in-debugfs.patch
x86-mm-point-to-struct-seq_file-from-struct-pg_state.patch
x86-mmefi-convert-ptdump_walk_pgd_level-to-take-a-mm_struct.patch
x86-mm-convert-ptdump_walk_pgd_level_debugfs-to-take-an-mm_struct.patch
x86-mm-convert-ptdump_walk_pgd_level_core-to-take-an-mm_struct.patch
mm-add-generic-ptdump.patch
x86-mm-convert-dump_pagetables-to-use-walk_page_range.patch
arm64-mm-convert-mm-dumpc-to-use-walk_page_range.patch
