leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
mainlining shenanigans
738,156 Commits 2 Branches 0 Tags 5.1 GiB
C 97.7%
Assembly 1.1%
Shell 0.4%
Makefile 0.3%
Python 0.2%
Other 0.1%
a7e6c7015b
Go to file
Dan Williams a7e6c7015b x86, memremap: fix altmap accounting at free 
Commit 24b6d41643 "mm: pass the vmem_altmap to vmemmap_free" converted
the vmemmap_free() path to pass the altmap argument all the way through
the call chain rather than looking it up based on the page.
Unfortunately that ends up over freeing altmap allocated pages in some
cases since free_pagetable() is used to free both memmap space and pte
space, where only the memmap stored in huge pages uses altmap
allocations.

Given that altmap allocations for memmap space are special cased in
vmemmap_populate_hugepages() add a symmetric / special case
free_hugepage_table() to handle altmap freeing, and cleanup the unneeded
passing of altmap to leaf functions that do not require it.

Without this change the sanity check accounting in
devm_memremap_pages_release() will throw a warning with the following
signature.

 nd_pmem pfn10.1: devm_memremap_pages_release: failed to free all reserved pages
 WARNING: CPU: 44 PID: 3539 at kernel/memremap.c:310 devm_memremap_pages_release+0x1c7/0x220
 CPU: 44 PID: 3539 Comm: ndctl Tainted: G             L   4.16.0-rc1-linux-stable #7
 RIP: 0010:devm_memremap_pages_release+0x1c7/0x220
 [..]
 Call Trace:
  release_nodes+0x225/0x270
  device_release_driver_internal+0x15d/0x210
  bus_remove_device+0xe2/0x160
  device_del+0x130/0x310
  ? klist_release+0x56/0x100
  ? nd_region_notify+0xc0/0xc0 [libnvdimm]
  device_unregister+0x16/0x60

This was missed in testing since not all configurations will trigger
this warning.

Fixes: 24b6d41643 ("mm: pass the vmem_altmap to vmemmap_free")
Reported-by: Jane Chu <jane.chu@oracle.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2018-03-14 14:46:23 -07:00
arch x86, memremap: fix altmap accounting at free 2018-03-14 14:46:23 -07:00
block for-linus-20180302 2018-03-02 09:35:36 -08:00
certs certs/blacklist_nohashes.c: fix const confusion in certs blacklist 2018-02-21 15:35:43 -08:00
crypto X.509: fix NULL dereference when restricting key with unsupported_sig 2018-02-22 14:38:34 +00:00
Documentation Merge branch 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-03-04 12:12:48 -08:00
drivers libnvdimm: remove redundant assignment to pointer 'dev' 2018-03-13 21:35:50 -07:00
firmware kbuild: remove all dummy assignments to obj- 2017-11-18 11:46:06 +09:00
fs for-4.16-rc3-tag 2018-03-04 11:04:27 -08:00
include Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm 2018-03-03 14:32:00 -08:00
init jump_label: Explicitly disable jump labels in __init code 2018-02-21 16:54:05 +01:00
ipc vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
kernel kernel/memremap: Remove stale devres_free() call 2018-03-06 10:58:54 -08:00
lib A single fix for a memory leak regression in the dma-debug code. 2018-02-28 11:13:08 -08:00
LICENSES LICENSES: Add MPL-1.1 license 2018-01-06 10:59:44 -07:00
mm mm: don't defer struct page initialization for Xen pv guests 2018-02-21 15:35:43 -08:00
net libceph, ceph: avoid memory leak when specifying same option several times 2018-02-26 16:19:30 +01:00
samples - do not build samples when cross compiling (Michal Hocko) 2018-02-27 10:39:29 -08:00
scripts Kbuild fixes for v4.16 2018-03-03 10:37:01 -08:00
security integrity/security: fix digsig.c build error with header file 2018-02-22 20:09:08 -08:00
sound ALSA: x86: Fix potential crash at error path 2018-02-28 08:46:00 +01:00
tools Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-03-04 11:40:16 -08:00
usr initramfs: fix initramfs rebuilds w/ compression after disabling 2017-11-03 07:39:19 -07:00
virt KVM: mmu: Fix overlap between public and private memslots 2018-02-24 01:43:36 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore .gitignore: ignore ASN.1 auto generated files 2018-02-14 21:05:38 +01:00
.mailmap mailmap: update Mark Yao's email address 2018-01-04 16:45:09 -08:00
COPYING
CREDITS MAINTAINERS: update TPM driver infrastructure changes 2017-11-09 17:58:40 -08:00
Kbuild Kbuild updates for v4.15 2017-11-17 17:45:29 -08:00
Kconfig License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
MAINTAINERS Kbuild fixes for v4.16 2018-03-03 10:37:01 -08:00
Makefile Linux 4.16-rc4 2018-03-04 14:54:11 -08:00
README README: add a new README file, pointing to the Documentation/ 2016-10-24 08:12:35 -02:00

README 

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

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.