Re: [PATCH v2 56/79] docs: Documentation/*.txt: rename all ReST files to *.rst

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Em Wed, 24 Apr 2019 08:52:09 +0200
Peter Zijlstra <peterz@xxxxxxxxxxxxx> escreveu:

> On Tue, Apr 23, 2019 at 11:38:16PM +0200, Borislav Petkov wrote:
> > If that is all the changes it would need, then I guess that's ok. Btw,
> > those rst-conversion patches don't really show what got changed. Dunno
> > if git can even show that properly. I diffed the two files by hand to
> > see what got changed, see end of mail.  
> 
> That is not a happy diff; that table has gotten waay worse to read due
> to all that extra table crap.

Not that I'm proposing such change, but, as a reference, I just discovered 
today that there's a way to make it even lighter than it is while still
showing it as a table:

=================  ======== ==   ================  ===== ==  ===========================================================
    Start addr        Offset        End addr         Size    VM area description
-----------------  -----------   ----------------  --------  -----------------------------------------------------------
 0000000000000000      0         00007fffffffffff    128 TB   user-space virtual memory, different per mm

 0000800000000000   +128    TB   ffff7fffffffffff   ~16M TB   ... huge, almost 64 bits wide hole of non-canonical
                                                                  virtual memory addresses up to the -128 TB
                                                                  starting offset of kernel mappings.

-----------------  -------- --   ----------------  ----- --  -----------------------------------------------------------
-                                                            Kernel-space virtual memory, shared between all processes:
-----------------  -----------   ----------------  --------  -----------------------------------------------------------

 ffff800000000000   -128    TB   ffff87ffffffffff      8 TB   ... guard hole, also reserved for hypervisor
 ffff880000000000   -120    TB   ffff887fffffffff    0.5 TB   LDT remap for PTI
 ffff888000000000   -119.5  TB   ffffc87fffffffff     64 TB   direct mapping of all physical memory (page_offset_base)
 ffffc88000000000    -55.5  TB   ffffc8ffffffffff    0.5 TB   ... unused hole
 ffffc90000000000    -55    TB   ffffe8ffffffffff     32 TB   vmalloc/ioremap space (vmalloc_base)
 ffffe90000000000    -23    TB   ffffe9ffffffffff      1 TB   ... unused hole
 ffffea0000000000    -22    TB   ffffeaffffffffff      1 TB   virtual memory map (vmemmap_base)
 ffffeb0000000000    -21    TB   ffffebffffffffff      1 TB   ... unused hole
 ffffec0000000000    -20    TB   fffffbffffffffff     16 TB   KASAN shadow memory
-----------------  -------- --   ----------------  ----- --  -----------------------------------------------------------
-                                                            Identical layout to the 56-bit one from here on:
-----------------  -----------   ----------------  --------  -----------------------------------------------------------

 fffffc0000000000     -4    TB   fffffdffffffffff      2 TB   ... unused hole
                                                              vaddr_end for KASLR
 fffffe0000000000     -2    TB   fffffe7fffffffff    0.5 TB   cpu_entry_area mapping
 fffffe8000000000     -1.5  TB   fffffeffffffffff    0.5 TB   ... unused hole
 ffffff0000000000     -1    TB   ffffff7fffffffff    0.5 TB   %esp fixup stacks
 ffffff8000000000   -512    GB   ffffffeeffffffff    444 GB   ... unused hole
 ffffffef00000000    -68    GB   fffffffeffffffff     64 GB   EFI region mapping space
 ffffffff00000000     -4    GB   ffffffff7fffffff      2 GB   ... unused hole
 ffffffff80000000     -2    GB   ffffffff9fffffff    512 MB   kernel text mapping, mapped to physical address 0
 ffffffff80000000  -2048    MB
 ffffffffa0000000  -1536    MB   fffffffffeffffff   1520 MB   module mapping space
 ffffffffff000000    -16    MB
    FIXADDR_START   ~-11    MB   ffffffffff5fffff   ~0.5 MB   kernel-internal fixmap range, variable size and offset
 ffffffffff600000    -10    MB   ffffffffff600fff      4 kB   legacy vsyscall ABI
 ffffffffffe00000     -2    MB   ffffffffffffffff      2 MB   ... unused hole
=================  ======== ==   ================  ===== ==  ===========================================================

If one wants the table headers as such, an extra line is required:


=================  ======== ==   ================  ===== ==  ===========================================================
    Start addr        Offset        End addr         Size    VM area description
-----------------  -----------   ----------------  --------  -----------------------------------------------------------
=================  ======== ==   ================  ===== ==  ===========================================================

<snip/>

=================  ======== ==   ================  ===== ==  ===========================================================


The output using this approach and a markup to use mono-spaced cells
e. g. either using ..raw or using .. cssclass as commented before in
this thread is at:

	https://www.infradead.org/~mchehab/rst_conversion/x86/x86_64/mm_alternative.html

Just converted the first table, keeping the other as a literal block.

Thanks,
Mauro
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