summaryrefslogtreecommitdiffstats
AgeCommit message (Collapse)Author
2016-08-18docs: sphinxify kmemcheck.txt and move to dev-toolsJonathan Corbet
Cc: Vegard Nossum <vegardno@ifi.uio.no> Cc: Pekka Enberg <penberg@kernel.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18docs: sphinxify kmemleak.txt and move it to dev-toolsJonathan Corbet
Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18docs: sphinxify ubsan.txt and move it to dev-toolsJonathan Corbet
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18docs: sphinxify kasan.txt and move to dev-toolsJonathan Corbet
No textual changes beyond formatting. Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Acked-by: Alexander Potapenko <glider@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18docs: sphinixfy gcov.txt and move to dev-toolsJonathan Corbet
No textual changes beyond formatting. Cc: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18docs: sphinxify kcov.txt and move to dev-toolsJonathan Corbet
Another document added to the dev-tools collection. Cc: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18docs: sphinxify sparse.txt and move to dev-toolsJonathan Corbet
Fold the sparse document into the development tools set; no changes to the text itself beyond formatting. Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18docs: sphinxify coccinelle.txt and add it to dev-toolsJonathan Corbet
No textual changes have been made, but the formatting has obviously been tweaked. Cc: Michal Marek <mmarek@suse.com> Cc: Gilles Muller <Gilles.Muller@lip6.fr> Acked-by: Nicolas Palix <nicolas.palix@imag.fr> Acked-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18docs: create a new dev-tools directoryJonathan Corbet
This directory will be a collecting point for documentation oriented around development tools. As a step toward ordering Documentation/ it's a small one, but we have to start somewhere... Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18Merge branch 'xelatex' into doc/4.9Jonathan Corbet
Mauro says: This patch series fix Sphinx to allow it to build the media documentation as a PDF file. The first patch is actually a bug fix: one of the previous patch broke compilation for PDF as a hole, as it added an extra parenthesis to a function call. The second patch just removes a left over code for rst2pdf. The other patches change from "pdflatex" to "xelatex" and address several issues that prevent building the media books. I think this patch series belong to docs-next. Feel free to merge them there, if you agree. There's one extra patch that touches Documentation/conf.py, re-adding the media book to the PDF build, but IMHO this one would be better to be merged via the media tree, after the fixes inside the media documentation to fix the build.
2016-08-18docs-rst: enable the Sphinx math extensionMauro Carvalho Chehab
This extension will be used by the media books. The name of the math image extension changed on Sphinx 1.4.x, according with: http://www.sphinx-doc.org/en/stable/ext/math.html#module-sphinx.ext.imgmath Let's autodetect, to keep building with versions < 1.4. Suggested-by: Markus Heiser <markus.heiser@darmarit.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18docs-rst: Don't go to interactive mode on errorsMauro Carvalho Chehab
When building for LaTeX, it stops and enters into interactive mode on errors. Don't do that, as there are some non-fatal errors on media books when using Sphinx 1.4.x that we don't know how fix yet. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18docs-rst: parse-heraders.pl: escape LaTeX charactersMauro Carvalho Chehab
Let's escape the LaTeX characters, to avoid troubles when outputing them. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18docs-rst: better adjust margins and font sizeMauro Carvalho Chehab
As we have big tables, reduce the left/right margins and decrease the point size to 8pt. Visually, it is still good enough, and now less tables are too big to be displayed. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18docs-rst: Don't mangle with UTF-8 chars on LaTeX/PDF outputMauro Carvalho Chehab
pdflatex doesn't accept using some UTF-8 chars, like "equal or less than" or "equal or greater than" chars. However, the media documents use them. So, we need to use XeLaTeX for conversion, and a font that accepts such characters. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18docs-rst: improve output for .. notes:: on LaTeXMauro Carvalho Chehab
The output for those notes are bad in pdf, as they're not in a box with a different color. Also, it causes the output to not build if the note is inside a table. Change its implementation to avoid the above troubles. The logic there came from: https://stackoverflow.com/questions/606746/how-to-customize-an-existing-latex-environment-without-interfering-with-other-en Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18docs-rst: allow generating some LaTeX pages in landscapeMauro Carvalho Chehab
Portrait is too small for some tables used at the media docs. So, allow documents to tell Sphinx to generate some pages in landscape by using: .. raw:: latex \begin{landscape} <some stuff> .. raw:: latex \end{landscape} Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18docs-rst: remove a rst2pdf left over codeMauro Carvalho Chehab
The usage of rst2pdf was replaced by pdflatex on a previous patch. Remove the left-over code at conf.py. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18docs-rst: fix a breakage when building PDF documentsMauro Carvalho Chehab
changeset 606b9ac81a63 ("doc-rst: generic way to build only sphinx sub-folders") accidentally broke PDF generation by adding an extra ")". Remove it. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18mm, kasan: Update kasan docs to indicate arm64 supportLaura Abbott
KASAN has been supported on arm64 since 39d114ddc682 ("arm64: add KASAN support"). Update the docs to indicate this. Signed-off-by: Laura Abbott <labbott@redhat.com> Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18doc-rst: add index to sub-foldersMarkus Heiser
Add a index if only a sub-folder is build e.g.:: make SPHINXDIRS=media cleandocs htmldocs BTW: removed dead search link in the top-index file Signed-off-by: Markus Heiser <markus.heiser@darmarIT.de> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18kconfig-language: improve menuconfig usage descriptionEugeniu Rosca
Improper menuconfig usage leads to empty menu entries. zconfdump() is able to reveal some real-life examples: - menuconfig VFIO_NOIOMMU - menuconfig RESET_CONTROLLER - menuconfig SND_ARM To avoid future occurrences of those, improve the menuconfig syntax description. Signed-off-by: Eugeniu Rosca <rosca.eugeniu@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18Update the maximum depth of C-state from 6 to 9baolex.ni
Hi Jon, This patch is an old one, we have corrected some minor issues on the newer one. Please only review the newest version from my last mail with this subject "[PATCH] ACPI: Update the maximum depth of C-state from 6 to 9". And I also attached it to this mail. Thanks, Baole On 7/11/2016 6:37 AM, Jonathan Corbet wrote: > On Mon, 4 Jul 2016 09:55:10 +0800 > "baolex.ni" <baolex.ni@intel.com> wrote: > >> Currently, CPUIDLE_STATE_MAX has been defined as 10 in the cpuidle head file, >> and max_cstate = CPUIDLE_STATE_MAX – 1, so 9 is the right maximum depth of C-state. >> This change is reflected in one place of the kernel-param file, >> but not in the other place where I suggest changing. >> >> Signed-off-by: Chuansheng Liu <chuansheng.liu@intel.com> >> Signed-off-by: Baole Ni <baolex.ni@intel.com> > > So why are there two signoffs on a single-line patch? Which one of you > is the actual author? > > Thanks, > > jon > From cf5f8aa6885874f6490b11507d3c0c86fa0a11f4 Mon Sep 17 00:00:00 2001 From: Chuansheng Liu <chuansheng.liu@intel.com> Date: Mon, 4 Jul 2016 08:52:51 +0800 Subject: [PATCH] Update the maximum depth of C-state from 6 to 9 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Currently, CPUIDLE_STATE_MAX has been defined as 10 in the cpuidle head file, and max_cstate = CPUIDLE_STATE_MAX – 1, so 9 is the right maximum depth of C-state. This change is reflected in one place of the kernel-param file, but not in the other place where I suggest changing. Signed-off-by: Chuansheng Liu <chuansheng.liu@intel.com> Signed-off-by: Baole Ni <baolex.ni@intel.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18Documentation: sunxi: Update Allwinner SoC documentationIcenowy Zheng
Now, the A83T and A64 SoC user manuals are available. Update the documentation to add the links. An updated version of A83T datasheet is also included now. Signed-off-by: Icenowy Zheng <icenowy@aosc.xyz> Acked-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-18Documentation: rs485: Do not define manually the ioctlRicardo Ribalda Delgado
It is not a very good practice to define the IOCTL manually instead of using the header file. Fix it on the documentation example. Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-15Documentation: kprobes: Document jprobes stack copying limitationsDavid A. Long
Some architectures (i.e.: sparc64 and arm64) make reasonable partial stack duplication for jprobes problematic. Document this. Signed-off-by: David A. Long <dave.long@linaro.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-14CodingStyle: Remove "Don't use C99-style comments"Joe Perches
Because Linus may still be reading source code on greenbar paper instead of color terminals with code syntax highlighting and appropriate font decorations. Link: http://lkml.kernel.org/r/CA+55aFyQYJerovMsSoSKS7PessZBr4vNp-3QUUwhqk4A4_jcbg@mail.gmail.com Signed-off-by: Joe Perches <joe@perches.com>
2016-08-14CodingStyle: Clarify and complete chapter 7Jean Delvare
Chapter 7 (Centralized exiting of functions) of the coding style documentation is unclear at times, and lacks some information (such as the possibility to indent labels with a single space.) Clarify and complete it. Signed-off-by: Jean Delvare <jdelvare@suse.de> Cc: Markus Elfring <elfring@users.sourceforge.net> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-14README: Delete obsolete i386 info + update arch/i386/ pathsØyvind A. Holm
Support for i386 was removed in v3.8, delete the paragraph that says processor types above 386 won't work on that architecture. It's obsolete information and potentially confusing. Also change a couple of "arch/i386/" paths to one that exists now, using "arch/x86/" instead. Signed-off-by: Øyvind A. Holm <sunny@sunbase.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-14Documentation: clk: update file names containing referenced structuresAndi Shyti
Commit 'b09d6d991' removes include/linux/clk-private.h and re-arranges the clock related structures contained in it in different files. The documentation has not been updated accordingly, thus it wasn't anymore consistent. Place the structures referenced by Documentation/clk.txt in the correct files and update their contents to the latest status. Signed-off-by: Andi Shyti <andi.shyti@samsung.com> [geert: Fix path to clk.c, whitespace, more clk_core, ...] Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-14doc-rst: add docutils config fileMarkus Heiser
To stop the sphinx-build on severe errors and exit with an exit code (to stop make) the halt_level must be set. The halt_level can't be set from sphinx, it is a docutils configuration [1]. For this a docutils.conf was added. [1] http://docutils.sourceforge.net/docs/user/config.html Signed-off-by: Markus Heiser <markus.heiser@darmarIT.de> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-14doc-rst: add stand-alone conf.py to gpu folderMarkus Heiser
With the gpu/conf.py, the gpu folder can be build and distributed stand-alone. To compile only the html of 'gpu' folder use:: make SPHINXDIRS="gpu" htmldocs Signed-off-by: Markus Heiser <markus.heiser@darmarIT.de> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-14doc-rst: add media/conf_nitpick.pyMarkus Heiser
The media/conf_nitpick.py is a *build-theme* wich uses the nit-picking mode of sphinx. To compile only the html of 'media' with the nit-picking build use:: make SPHINXDIRS=media SPHINX_CONF=conf_nitpick.py htmldocs With this, the Documentation/conf.py is read first and updated with the configuration values from the Documentation/media/conf_nitpick.py. The origin media/conf_nitpick.py comes from Mauro's experimental docs-next branch:: https://git.linuxtv.org/mchehab/experimental.git mchehab/docs-next BTW fixed python indentation in media/conf_nitpick.py. Python indentation is 4 spaces [1] and Python 3 disallows mixing the use of tabs and spaces for indentation [2]. [1] https://www.python.org/dev/peps/pep-0008/#indentation [2] https://www.python.org/dev/peps/pep-0008/#tabs-or-spaces Signed-off-by: Markus Heiser <markus.heiser@darmarIT.de> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-14doc-rst: add stand-alone conf.py to media folderMarkus Heiser
With the media/conf.py, and media/index.rst the media folder can be build and distributed stand-alone. Signed-off-by: Markus Heiser <markus.heiser@darmarIT.de> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-14doc-rst: generic way to build only sphinx sub-foldersMarkus Heiser
Add a generic way to build only a reST sub-folder with or without a individual *build-theme*. * control *sub-folders* by environment SPHINXDIRS * control *build-theme* by environment SPHINX_CONF Folders with a conf.py file, matching $(srctree)/Documentation/*/conf.py can be build and distributed *stand-alone*. E.g. to compile only the html of 'media' and 'gpu' folder use:: make SPHINXDIRS="media gpu" htmldocs To use an additional sphinx-build configuration (*build-theme*) set the name of the configuration file to SPHINX_CONF. E.g. to compile only the html of 'media' with the *nit-picking* build use:: make SPHINXDIRS=media SPHINX_CONF=conf_nitpick.py htmldocs With this, the Documentation/conf.py is read first and updated with the configuration values from the Documentation/media/conf_nitpick.py. Signed-off-by: Markus Heiser <markus.heiser@darmarIT.de> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-12Documentation: exclude media documentation from pdf generationJani Nikula
Although pdflatex is more robust than rst2pdf, building media documentation pdf still fails. Exclude media documentation from pdf generation for now. Signed-off-by: Jani Nikula <jani.nikula@intel.com> Acked-by: Markus Heiser <markus.heiser@darmarit.de> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-12Documentation: switch to pdflatex for pdf generationJani Nikula
Looks like rst2pdf is not robust enough, especially for large documents. Use recursive make on the Sphinx generated makefile to convert latex to pdf. The ugly detail is that pdf is generated into Documentation/output/latex. Unfortunately, the pdflatex build generates huge amounts of build log noise, and also fails in the end. We'll fix that next. Signed-off-by: Jani Nikula <jani.nikula@intel.com> Acked-by: Markus Heiser <markus.heiser@darmarit.de> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-12Documentation/sphinx: build the media intermediate rst files for all outputsJani Nikula
This is a stopgap measure to allow building outputs other than html. Signed-off-by: Jani Nikula <jani.nikula@intel.com> Acked-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Acked-by: Markus Heiser <markus.heiser@darmarit.de> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-08-07Linux 4.8-rc1Linus Torvalds
2016-08-07Merge branch 'for-linus' of git://git.kernel.dk/linux-blockLinus Torvalds
Pull more block fixes from Jens Axboe: "As mentioned in the pull the other day, a few more fixes for this round, all related to the bio op changes in this series. Two fixes, and then a cleanup, renaming bio->bi_rw to bio->bi_opf. I wanted to do that change right after or right before -rc1, so that risk of conflict was reduced. I just rebased the series on top of current master, and no new ->bi_rw usage has snuck in" * 'for-linus' of git://git.kernel.dk/linux-block: block: rename bio bi_rw to bi_opf target: iblock_execute_sync_cache() should use bio_set_op_attrs() mm: make __swap_writepage() use bio_set_op_attrs() block/mm: make bdev_ops->rw_page() take a bool for read/write
2016-08-07Merge tag 'drm-for-v4.8-zpos' of git://people.freedesktop.org/~airlied/linuxLinus Torvalds
Pull drm zpos property support from Dave Airlie: "This tree was waiting on some media stuff I hadn't had time to get a stable branchpoint off, so I just waited until it was all in your tree first. It's been around a bit on the list and shouldn't affect anything outside adding the generic API and moving some ARM drivers to using it" * tag 'drm-for-v4.8-zpos' of git://people.freedesktop.org/~airlied/linux: drm: rcar: use generic code for managing zpos plane property drm/exynos: use generic code for managing zpos plane property drm: sti: use generic zpos for plane drm: add generic zpos property
2016-08-07block: rename bio bi_rw to bi_opfJens Axboe
Since commit 63a4cc24867d, bio->bi_rw contains flags in the lower portion and the op code in the higher portions. This means that old code that relies on manually setting bi_rw is most likely going to be broken. Instead of letting that brokeness linger, rename the member, to force old and out-of-tree code to break at compile time instead of at runtime. No intended functional changes in this commit. Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-07target: iblock_execute_sync_cache() should use bio_set_op_attrs()Jens Axboe
The original commit missed this function, it needs to mark it a write flush. Cc: Mike Christie <mchristi@redhat.com> Fixes: e742fc32fcb4 ("target: use bio op accessors") Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-07mm: make __swap_writepage() use bio_set_op_attrs()Jens Axboe
Cleaner than manipulating bio->bi_rw flags directly. Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-07block/mm: make bdev_ops->rw_page() take a bool for read/writeJens Axboe
Commit abf545484d31 changed it from an 'rw' flags type to the newer ops based interface, but now we're effectively leaking some bdev internals to the rest of the kernel. Since we only care about whether it's a read or a write at that level, just pass in a bool 'is_write' parameter instead. Then we can also move op_is_write() and friends back under CONFIG_BLOCK protection. Reviewed-by: Mike Christie <mchristi@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2016-08-07Merge tag 'doc-4.8-fixes' of git://git.lwn.net/linuxLinus Torvalds
Pull documentation fixes from Jonathan Corbet: "Three fixes for the docs build, including removing an annoying warning on 'make help' if sphinx isn't present" * tag 'doc-4.8-fixes' of git://git.lwn.net/linux: DocBook: use DOCBOOKS="" to ignore DocBooks instead of IGNORE_DOCBOOKS=1 Documenation: update cgroup's document path Documentation/sphinx: do not warn about missing tools in 'make help'
2016-08-07Merge tag 'binfmt-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/binfmt_misc Pull binfmt_misc update from James Bottomley: "This update is to allow architecture emulation containers to function such that the emulation binary can be housed outside the container itself. The container and fs parts both have acks from relevant experts. To use the new feature you have to add an F option to your binfmt_misc configuration" From the docs: "The usual behaviour of binfmt_misc is to spawn the binary lazily when the misc format file is invoked. However, this doesn't work very well in the face of mount namespaces and changeroots, so the F mode opens the binary as soon as the emulation is installed and uses the opened image to spawn the emulator, meaning it is always available once installed, regardless of how the environment changes" * tag 'binfmt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/binfmt_misc: binfmt_misc: add F option description to documentation binfmt_misc: add persistent opened binary handler for containers fs: add filp_clone_open API
2016-08-07fs: return EPERM on immutable inodeEryu Guan
In most cases, EPERM is returned on immutable inode, and there're only a few places returning EACCES. I noticed this when running LTP on overlayfs, setxattr03 failed due to unexpected EACCES on immutable inode. So converting all EACCES to EPERM on immutable inode. Acked-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-07Merge branch 'for-linus-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull more vfs updates from Al Viro: "Assorted cleanups and fixes. In the "trivial API change" department - ->d_compare() losing 'parent' argument" * 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: cachefiles: Fix race between inactivating and culling a cache object 9p: use clone_fid() 9p: fix braino introduced in "9p: new helper - v9fs_parent_fid()" vfs: make dentry_needs_remove_privs() internal vfs: remove file_needs_remove_privs() vfs: fix deadlock in file_remove_privs() on overlayfs get rid of 'parent' argument of ->d_compare() cifs, msdos, vfat, hfs+: don't bother with parent in ->d_compare() affs ->d_compare(): don't bother with ->d_inode fold _d_rehash() and __d_rehash() together fold dentry_rcuwalk_invalidate() into its only remaining caller
2016-08-06Merge tag 'xfs-rmap-for-linus-4.8-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs Pull more xfs updates from Dave Chinner: "This is the second part of the XFS updates for this merge cycle, and contains the new reverse block mapping feature for XFS. Reverse mapping allows us to track the owner of a specific block on disk precisely. It is implemented as a set of btrees (one per allocation group) that track the owners of allocated extents. Effectively it is a "used space tree" that is updated when we allocate or free extents. i.e. it is coherent with the free space btrees we already maintain and never overlaps with them. This reverse mapping infrastructure is the building block of several upcoming features - reflink, copy-on-write data, dedupe, online metadata and data scrubbing, highly accurate bad sector/data loss reporting to users, and significantly improved reconstruction of damaged and corrupted filesystems. There's a lot of new stuff coming along in the next couple of cycles,a nd it all builds in the rmap infrastructure. As such, it's a huge chunk of new code with new on-disk format features and internal infrastructure. It warns at mount time as an experimental feature and that it may eat data (as we do with all new on-disk features until they stabilise). We have not released userspace suport for it yet - userspace support currently requires download from Darrick's xfsprogs repo and build from source, so the access to this feature is really developer/tester only at this point. Initial userspace support will be released at the same time kernel with this code in it is released. The new rmap enabled code regresses 3 xfstests - all are ENOSPC related corner cases, one of which Darrick posted a fix for a few hours ago. The other two are fixed by infrastructure that is part of the upcoming reflink patchset. This new ENOSPC infrastructure requires a on-disk format tweak required to keep mount times in check - we need to keep an on-disk count of allocated rmapbt blocks so we don't have to scan the entire btrees at mount time to count them. This is currently being tested and will be part of the fixes sent in the next week or two so users will not be exposed to this change" * tag 'xfs-rmap-for-linus-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs: (52 commits) xfs: move (and rename) the deferred bmap-free tracepoints xfs: collapse single use static functions xfs: remove unnecessary parentheses from log redo item recovery functions xfs: remove the extents array from the rmap update done log item xfs: in btree_lshift, only allocate temporary cursor when needed xfs: remove unnecesary lshift/rshift key initialization xfs: remove the get*keys and update_keys btree ops pointers xfs: enable the rmap btree functionality xfs: don't update rmapbt when fixing agfl xfs: disable XFS_IOC_SWAPEXT when rmap btree is enabled xfs: add rmap btree block detection to log recovery xfs: add rmap btree geometry feature flag xfs: propagate bmap updates to rmapbt xfs: enable the xfs_defer mechanism to process rmaps to update xfs: log rmap intent items xfs: create rmap update intent log items xfs: add rmap btree insert and delete helpers xfs: convert unwritten status of reverse mappings xfs: remove an extent from the rmap btree xfs: add an extent to the rmap btree ...
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-08 11:54:17 +0000