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| Filename | Latest commit message | Latest commit date |
|---|---|---|
cabe8138b2
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> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.