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author | Christophe Leroy <christophe.leroy@c-s.fr> | 2019-02-18 15:25:20 +0300 |
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committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-02-21 16:10:16 +0300 |
commit | cabe8138b23c92e851b92c6a20ffb13598ff34d4 (patch) | |
tree | 4543821f10ce9b478401c3908c09bf58ed3f6af5 /arch/powerpc/Kconfig.debug | |
parent | fa7b9a805c797b729022029aaa3a2b7c35fff4c6 (diff) | |
download | linux-cabe8138b23c92e851b92c6a20ffb13598ff34d4.tar.xz |
powerpc: dump as a single line areas mapping a single physical page.
When using KASAN, there are parts of the shadow area where all
pages are mapped to the kasan_early_shadow_page. It is pointless
to dump one line for each of those pages (in the example below there
are 7168 entries pointing to the same physical page).
~# cat /sys/kernel/debug/kernel_page_tables
...
---[ kasan shadow mem start ]---
0xf7c00000-0xf8bfffff 0x06fac000 16M rw present dirty accessed
0xf8c00000-0xf8c03fff 0x00cd0000 16K r present dirty accessed
0xf8c04000-0xf8c07fff 0x00cd0000 16K r present dirty accessed
0xf8c08000-0xf8c0bfff 0x00cd0000 16K r present dirty accessed
0xf8c0c000-0xf8c0ffff 0x00cd0000 16K r present dirty accessed
0xf8c10000-0xf8c13fff 0x00cd0000 16K r present dirty accessed
... 7168 identical lines
0xffbfc000-0xffbfffff 0x00cd0000 16K r present dirty accessed
---[ kasan shadow mem end ]---
...
This patch modifies linux table dump to dump as a single line areas
where all addresses points to the same physical page. That physical
address is put inside [] to show that all virt pages points to the
same phys page.
~# cat /sys/kernel/debug/kernel_page_tables
...
---[ kasan shadow mem start ]---
0xf7c00000-0xf8bfffff 0x06fac000 16M rw present dirty accessed
0xf8c00000-0xffbfffff [0x00cd0000] 16K r present dirty accessed
---[ kasan shadow mem end ]---
...
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/Kconfig.debug')
0 files changed, 0 insertions, 0 deletions