- May 14, 2019
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Jérôme Glisse authored
The HMM mirror API can be use in two fashions. The first one where the HMM user coalesce multiple page faults into one request and set flags per pfns for of those faults. The second one where the HMM user want to pre-fault a range with specific flags. For the latter one it is a waste to have the user pre-fill the pfn arrays with a default flags value. This patch adds a default flags value allowing user to set them for a range without having to pre-fill the pfn array. Link: http://lkml.kernel.org/r/20190403193318.16478-8-jglisse@redhat.com Signed-off-by:
Jérôme Glisse <jglisse@redhat.com> Reviewed-by:
Ralph Campbell <rcampbell@nvidia.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Balbir Singh <bsingharora@gmail.com> Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: Ira Weiny <ira.weiny@intel.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Souptick Joarder <jrdr.linux@gmail.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Jérôme Glisse authored
A common use case for HMM mirror is user trying to mirror a range and before they could program the hardware it get invalidated by some core mm event. Instead of having user re-try right away to mirror the range provide a completion mechanism for them to wait for any active invalidation affecting the range. This also changes how hmm_range_snapshot() and hmm_range_fault() works by not relying on vma so that we can drop the mmap_sem when waiting and lookup the vma again on retry. Link: http://lkml.kernel.org/r/20190403193318.16478-7-jglisse@redhat.com Signed-off-by:
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Jérôme Glisse authored
Minor optimization around hmm_pte_need_fault(). Rename for consistency between code, comments and documentation. Also improves the comments on all the possible returns values. Improve the function by returning the number of populated entries in pfns array. Link: http://lkml.kernel.org/r/20190403193318.16478-6-jglisse@redhat.com Signed-off-by:
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Jérôme Glisse authored
Rename for consistency between code, comments and documentation. Also improves the comments on all the possible returns values. Improve the function by returning the number of populated entries in pfns array. Link: http://lkml.kernel.org/r/20190403193318.16478-5-jglisse@redhat.com Signed-off-by:
John Hubbard <jhubbard@nvidia.com> Reviewed-by:
Ira Weiny <ira.weiny@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Balbir Singh <bsingharora@gmail.com> Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Souptick Joarder <jrdr.linux@gmail.com> Signed-off-by:
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Kirill Tkhai authored
Patch series "mm: Generalize putback functions"] putback_inactive_pages() and move_active_pages_to_lru() are almost similar, so this patchset merges them ina single function. This patch (of 4): The patch moves the calculation from putback_inactive_pages() to shrink_inactive_list(). This makes putback_inactive_pages() looking more similar to move_active_pages_to_lru(). To do that, we account activated pages in reclaim_stat::nr_activate. Since a page may change its LRU type from anon to file cache inside shrink_page_list() (see ClearPageSwapBacked()), we have to account pages for the both types. So, nr_activate becomes an array. Previously we used nr_activate to account PGACTIVATE events, but now we account them into pgactivate variable (since they are about number of pages in general, not about sum of hpage_nr_pages). Link: http://lkml.kernel.org/r/155290127956.31489.3393586616054413298.stgit@localhost.localdomain Signed-off-by:
Kirill Tkhai <ktkhai@virtuozzo.com> Reviewed-by:
Daniel Jordan <daniel.m.jordan@oracle.com> Cc: Michal Hocko <mhocko@kernel.org> Signed-off-by:
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Peter Xu authored
Userfaultfd can be misued to make it easier to exploit existing use-after-free (and similar) bugs that might otherwise only make a short window or race condition available. By using userfaultfd to stall a kernel thread, a malicious program can keep some state that it wrote, stable for an extended period, which it can then access using an existing exploit. While it doesn't cause the exploit itself, and while it's not the only thing that can stall a kernel thread when accessing a memory location, it's one of the few that never needs privilege. We can add a flag, allowing userfaultfd to be restricted, so that in general it won't be useable by arbitrary user programs, but in environments that require userfaultfd it can be turned back on. Add a global sysctl knob "vm.unprivileged_userfaultfd" to control whether userfaultfd is allowed by unprivileged users. When this is set to zero, only privileged users (root user, or users with the CAP_SYS_PTRACE capability) will be able to use the userfaultfd syscalls. Andrea said: : The only difference between the bpf sysctl and the userfaultfd sysctl : this way is that the bpf sysctl adds the CAP_SYS_ADMIN capability : requirement, while userfaultfd adds the CAP_SYS_PTRACE requirement, : because the userfaultfd monitor is more likely to need CAP_SYS_PTRACE : already if it's doing other kind of tracking on processes runtime, in : addition of userfaultfd. In other words both syscalls works only for : root, when the two sysctl are opt-in set to 1. [dgilbert@redhat.com: changelog additions] [akpm@linux-foundation.org: documentation tweak, per Mike] Link: http://lkml.kernel.org/r/20190319030722.12441-2-peterx@redhat.com Signed-off-by:
Peter Xu <peterx@redhat.com> Suggested-by:
Andrea Arcangeli <aarcange@redhat.com> Suggested-by:
Mike Rapoport <rppt@linux.ibm.com> Reviewed-by:
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- May 09, 2019
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Gary Lin authored
The section titles of 3.4 and 3.5 are not marked correctly. Signed-off-by:
Gary Lin <glin@suse.com> Signed-off-by:
Alexei Starovoitov <ast@kernel.org>
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Neil Armstrong authored
Update the doc to explicitly support Meson G12A Family. The 2 first (A & B) AO PWM uses different clock source than the last 2 (C & D) AO PWM modules, thus we need to differentiate them. Signed-off-by:
Neil Armstrong <narmstrong@baylibre.com> Reviewed-by:
Martin Blumenstingl <martin.blumenstingl@googlemail.com> Reviewed-by:
Rob Herring <robh@kernel.org> Signed-off-by:
Thierry Reding <thierry.reding@gmail.com>
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Anson Huang authored
Add i.MX TPM(Low Power Timer/Pulse Width Modulation Module) PWM binding. Signed-off-by:
Anson Huang <Anson.Huang@nxp.com> Reviewed-by:
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Marek Behun authored
This adds device tree binding documentation for the rWTM BIU mailbox driver on the Armada 37xx SOC (EspressoBin, Turris Mox). Signed-off-by:
Marek Behun <marek.behun@nic.cz> Reviewed-by:
Jassi Brar <jaswinder.singh@linaro.org>
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Mauro Carvalho Chehab authored
Rename the sparc documentation files to ReST, add an index for them and adjust in order to produce a nice html output via the Sphinx build system. There is an except from a document under oradax dir. It doesn't seem to make much sense to convert this one to ReST, so let's add it as an included document. At its new index.rst, let's add a :orphan: while this is not linked to the main index.rst file, in order to avoid build warnings. Signed-off-by:
Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- May 08, 2019
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
Changbin Du <changbin.du@gmail.com> Reviewed-by:
Jonathan Corbet <corbet@lwn.net>
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
This converts the plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by:
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Changbin Du authored
Add a index.rst for x86 support. More docs will be added later. Signed-off-by:
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Tzvetomir Stoyanov authored
The current trace documentation, the section describing histogram's "onmatch" is not straightforward enough about how this action is applied. It is not clear what criteria are used to "match" both events. A short note is added, describing what exactly is compared in order to match the events. Signed-off-by:
Tzvetomir Stoyanov <tstoyanov@vmware.com> Reviewed-by:
Steven Rostedt (VMware) <rostedt@goodmis.org> Reviewed-by:
Tom Zanussi <tom.zanussi@linux.intel.com> [jc: fixed trivial conflict with docs-next] Signed-off-by:
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Federico Vaga authored
This patch translates in Italian the following updates 62be257e LICENSES: Rename other to deprecated 8ea8814f LICENSES: Clearly mark dual license only licenses 6132c37c docs: Don't reference the ZLib license in license-rules.rst Signed-off-by:
Federico Vaga <federico.vaga@vaga.pv.it> Signed-off-by:
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