UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity
1,013,988 Commits 6 Branches 32 Tags 3.2 GiB
C 97%
Assembly 1.4%
C++ 0.6%
Makefile 0.3%
Shell 0.3%
Other 0.3%
Go to file
Christophe Leroy 6ca6512c71 powerpc/mm: Properly coalesce pages in ptdump 
Commit aaa2295292 ("powerpc/mm: Add physical address to Linux page
table dump") changed range coalescing to only combine ranges that are
both virtually and physically contiguous, in order to avoid erroneous
combination of unrelated mappings in IOREMAP space.

But in the VMALLOC space, mappings almost never have contiguous
physical pages, so the commit mentionned above leads to dumping one
line per page for vmalloc mappings.

Taking into account the vmalloc always leave a gap between two areas,
we never have two mappings dumped as a single combination even if they
have the exact same flags. The only space that may have encountered
such an issue was the early IOREMAP which is not using vmalloc engine.
But previous commits added gaps between early IO mappings, so it is
not an issue anymore.

That commit created some difficulties with KASAN mappings, see
commit cabe8138b2 ("powerpc: dump as a single line areas mapping a
single physical page.") and with huge page, see
commit b00ff6d8c1 ("powerpc/ptdump: Properly handle non standard
page size").

So, almost revert commit aaa2295292 to properly coalesce pages
mapped with the same flags as before, only keep the display of the
first physical address of the range, as it can be usefull especially
for IO mappings.

It brings back powerpc at the same level as other architectures and
simplifies the conversion to GENERIC PTDUMP.

With the patch:

---[ kasan shadow mem start ]---
0xf8000000-0xf8ffffff  0x07000000        16M   huge        rw       present           dirty  accessed
0xf9000000-0xf91fffff  0x01434000         2M               r        present                  accessed
0xf9200000-0xf95affff  0x02104000      3776K               rw       present           dirty  accessed
0xfef5c000-0xfeffffff  0x01434000       656K               r        present                  accessed
---[ kasan shadow mem end ]---

Before:

---[ kasan shadow mem start ]---
0xf8000000-0xf8ffffff  0x07000000        16M   huge        rw       present           dirty  accessed
0xf9000000-0xf91fffff  0x01434000        16K               r        present                  accessed
0xf9200000-0xf9203fff  0x02104000        16K               rw       present           dirty  accessed
0xf9204000-0xf9207fff  0x0213c000        16K               rw       present           dirty  accessed
0xf9208000-0xf920bfff  0x02174000        16K               rw       present           dirty  accessed
0xf920c000-0xf920ffff  0x02188000        16K               rw       present           dirty  accessed
0xf9210000-0xf9213fff  0x021dc000        16K               rw       present           dirty  accessed
0xf9214000-0xf9217fff  0x02220000        16K               rw       present           dirty  accessed
0xf9218000-0xf921bfff  0x023c0000        16K               rw       present           dirty  accessed
0xf921c000-0xf921ffff  0x023d4000        16K               rw       present           dirty  accessed
0xf9220000-0xf9227fff  0x023ec000        32K               rw       present           dirty  accessed
...
0xf93b8000-0xf93e3fff  0x02614000       176K               rw       present           dirty  accessed
0xf93e4000-0xf94c3fff  0x027c0000       896K               rw       present           dirty  accessed
0xf94c4000-0xf94c7fff  0x0236c000        16K               rw       present           dirty  accessed
0xf94c8000-0xf94cbfff  0x041f0000        16K               rw       present           dirty  accessed
0xf94cc000-0xf94cffff  0x029c0000        16K               rw       present           dirty  accessed
0xf94d0000-0xf94d3fff  0x041ec000        16K               rw       present           dirty  accessed
0xf94d4000-0xf94d7fff  0x0407c000        16K               rw       present           dirty  accessed
0xf94d8000-0xf94f7fff  0x041c0000       128K               rw       present           dirty  accessed
...
0xf95ac000-0xf95affff  0x042b0000        16K               rw       present           dirty  accessed
0xfef5c000-0xfeffffff  0x01434000        16K               r        present                  accessed
---[ kasan shadow mem end ]---

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/c56ce1f5c3c75adc9811b1a5f9c410fa74183a8d.1618828806.git.christophe.leroy@csgroup.eu
 		2021-06-25 00:07:10 +10:00
Documentation Merge branch 'topic/ppc-kvm' into next 2021-06-23 00:19:08 +10:00
LICENSES LICENSES: Add the CC-BY-4.0 license 2020-12-08 10:33:27 -07:00
arch powerpc/mm: Properly coalesce pages in ptdump 2021-06-25 00:07:10 +10:00
block block-5.13-2021-05-14 2021-05-15 08:52:30 -07:00
certs Kbuild updates for v5.13 (2nd) 2021-05-08 10:00:11 -07:00
crypto for-5.13/drivers-2021-04-27 2021-04-28 14:39:37 -07:00
drivers crypto/nx: Register and unregister VAS interface on PowerVM 2021-06-20 21:58:58 +10:00
fs Merge branch 'akpm' (patches from Andrew) 2021-05-15 09:42:27 -07:00
include Merge branch 'topic/ppc-kvm' into next 2021-06-23 00:19:08 +10:00
init Merge branch 'akpm' (patches from Andrew) 2021-05-07 00:34:51 -07:00
ipc ipc/sem.c: spelling fix 2021-05-07 00:26:34 -07:00
kernel kprobes: Allow architectures to override optinsn page allocation 2021-05-23 20:51:35 +10:00
lib kasan: fix unit tests with CONFIG_UBSAN_LOCAL_BOUNDS enabled 2021-05-14 19:41:32 -07:00
mm mm/ioremap: fix iomap_max_page_shift 2021-05-14 19:41:32 -07:00
net mm: fix struct page layout on 32-bit systems 2021-05-14 19:41:32 -07:00
samples Kbuild updates for v5.13 (2nd) 2021-05-08 10:00:11 -07:00
scripts Kbuild updates for v5.13 (2nd) 2021-05-08 10:00:11 -07:00
security trusted-keys: match tpm_get_ops on all return paths 2021-05-12 22:36:37 +03:00
sound sound fixes for 5.13-rc1 2021-05-07 11:40:18 -07:00
tools selftests/powerpc: EBB selftest for MMCR0 control for PMU SPRs in ISA v3.1 2021-06-17 00:09:11 +10:00
usr .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
virt kvm: Cap halt polling at kvm->max_halt_poll_ns 2021-05-07 06:06:22 -04:00
.clang-format cxl for 5.12 2021-02-24 09:38:36 -08:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: ignore only top-level modules.builtin 2021-05-02 00:43:35 +09:00
.mailmap Merge drm/drm-fixes into drm-misc-fixes 2021-05-11 13:35:52 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: move Murali Karicheri to credits 2021-04-29 15:47:30 -07:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS libnvdimm fixes for 5.13-rc2 2021-05-15 08:32:51 -07:00
Makefile Linux 5.13-rc2 2021-05-16 15:27:44 -07:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

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.