- 06 11月, 2017 1 次提交
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由 Harry Morris 提交于
Remove non-functioning secondary email address from maintainer information. Signed-off-by: NHarry Morris <h.morris@cascoda.com> Signed-off-by: NStefan Schmidt <stefan@osg.samsung.com>
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- 04 11月, 2017 1 次提交
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由 Paul Burton 提交于
MIPS will soon not be a part of Imagination Technologies, and as such many @imgtec.com email addresses will no longer be valid. This patch updates the addresses for those who: - Have 10 or more patches in mainline authored using an @imgtec.com email address, or any patches dated within the past year. - Are still with Imagination but leaving as part of the MIPS business unit, as determined from an internal email address list. - Haven't already updated their email address (ie. JamesH) or expressed a desire to be excluded (ie. Maciej). - Acked v2 or earlier of this patch, which leaves Deng-Cheng, Matt & myself. New addresses are of the form firstname.lastname@mips.com, and all verified against an internal email address list. An entry is added to .mailmap for each person such that get_maintainer.pl will report the new addresses rather than @imgtec.com addresses which will soon be dead. Instances of the affected addresses throughout the tree are then mechanically replaced with the new @mips.com address. Signed-off-by: NPaul Burton <paul.burton@mips.com> Cc: Deng-Cheng Zhu <dengcheng.zhu@imgtec.com> Cc: Deng-Cheng Zhu <dengcheng.zhu@mips.com> Acked-by: NDengcheng Zhu <dengcheng.zhu@mips.com> Cc: Matt Redfearn <matt.redfearn@imgtec.com> Cc: Matt Redfearn <matt.redfearn@mips.com> Acked-by: NMatt Redfearn <matt.redfearn@mips.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: trivial@kernel.org Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 02 11月, 2017 1 次提交
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由 Parvi Kaustubhi 提交于
Add myself to list of maintainers for cisco vic ethernet nic driver. Remove Neel as he left. Signed-off-by: NParvi Kaustubhi <pkaustub@cisco.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 01 11月, 2017 4 次提交
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由 Andy Shevchenko 提交于
It looks like the best place in MAINTAINERS data base to cover this orphaned module. Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Alexei Starovoitov 提交于
to address common misconceptions about what BPF is and what it's not add short BPF Q&A that clarifies core BPF design principles and answers some common questions. Signed-off-by: NAlexei Starovoitov <ast@kernel.org> Acked-by: NDaniel Borkmann <daniel@iogearbox.net> Acked-by: NJohn Fastabend <john.fastabend@gmail.com> Acked-by: NJakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Yuval Mintz 提交于
Provide a mailing list for maintenance of the module instead. Signed-off-by: NYuval Mintz <yuvalm@mellanox.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Yotam Gigi 提交于
For the time being I will be available in my private mail. Update both the MAINTAINERS file and the individual modules MODULE_AUTHOR directive with the new address. Signed-off-by: NYotam Gigi <yotam.gi@gmail.com> Signed-off-by: NYuval Mintz <yuvalm@mellanox.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 27 10月, 2017 4 次提交
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由 Florian Fainelli 提交于
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Egil Hjelmeland 提交于
The next patch require net/dsa/tag_lan9303.c to access struct lan9303. Therefore move struct lan9303 definitions from drivers/net/dsa/lan9303.h to new file include/linux/dsa/lan9303.h. Signed-off-by: NEgil Hjelmeland <privat@egil-hjelmeland.no> Reviewed-by: NAndrew Lunn <andrew@lunn.ch> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Johannes Berg 提交于
This file doesn't exist. Signed-off-by: NJohannes Berg <johannes.berg@intel.com> Signed-off-by: NKalle Valo <kvalo@qca.qualcomm.com>
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由 Juergen Gross 提交于
Mails to chrisw@sous-sol.org are not deliverable since several months. Drop him as PARAVIRT_OPS maintainer. Signed-off-by: NJuergen Gross <jgross@suse.com> Acked-by: NChris Wright <chrisw@redhat.com> Signed-off-by: NJuergen Gross <jgross@suse.com>
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- 19 10月, 2017 1 次提交
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由 Netanel Belgazal 提交于
ENA driver was developed by developers from Annapurna Labs. Annapurna Labs was acquired by Amazon and the company's domain (@annapurnalabs.com) will become deprecated soon. Update the email addresses of the maintainers to the alternative amazon emails (@amazon.com) Signed-off-by: NNetanel Belgazal <netanel@amazon.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 17 10月, 2017 1 次提交
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由 Bin Liu 提交于
Commit 3b243519 ("MAINTAINERS: drop OMAP USB and MUSB maintainership") switched the maintainer for musb module, but didn't update the git tree location. Delete the git tree information, since the current maintainer doesn't have a public tree. Reported-by: NJonathan Liu <net147@gmail.com> Signed-off-by: NBin Liu <b-liu@ti.com> Acked-by: NFelipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 16 10月, 2017 1 次提交
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由 Arnaldo Carvalho de Melo 提交于
Jiri and Namhyung have long contributed a lot of code and time reviewing patches to tools/, so lets make that reflected in the MAINTAINERS file to encourage patch submitters to add them to the CC list, speeding up the process of tools/perf/ patch processing. Acked-by: NJiri Olsa <jolsa@kernel.org> Acked-by: NNamhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-onicopw68bg6kn56lnybfpns@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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- 12 10月, 2017 1 次提交
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由 Thomas Huth 提交于
Paul is handling almost all of the powerpc related KVM patches nowadays, so he should be mentioned in the MAINTAINERS file accordingly. Signed-off-by: NThomas Huth <thuth@redhat.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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- 11 10月, 2017 1 次提交
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由 Johannes Berg 提交于
Update my MAINTAINERS file entries to list all the right files. Since I'm also the de-facto wireless extensions maintainer, there's little point in excluding those. Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
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- 06 10月, 2017 2 次提交
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由 Stefan Hajnoczi 提交于
This patch adds tests for the vsock_diag.ko module. These tests are not self-tests because they require manual set up of a KVM or VMware guest. Please see tools/testing/vsock/README for instructions. The control.h and timeout.h infrastructure can be used for additional AF_VSOCK tests in the future. Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Stefan Hajnoczi 提交于
This patch adds the sock_diag interface for querying sockets from userspace. Tools like ss(8) and netstat(8) can use this interface to list open sockets. The userspace ABI is defined in <linux/vm_sockets_diag.h> and includes netlink request and response structs. The request can query sockets based on their sk_state (e.g. listening sockets only) and the response contains socket information fields including the local/remote addresses, inode number, etc. This patch does not dump VMCI pending sockets because I have only tested the virtio transport, which does not use pending sockets. Support can be added later by extending vsock_diag_dump() if needed by VMCI users. Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 05 10月, 2017 2 次提交
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由 Jakub Kicinski 提交于
We currently only have BPF tools in the tools/net directory. We are about to add more BPF tools there, not necessarily networking related, rename the directory and related Makefile targets to bpf. Suggested-by: NDaniel Borkmann <daniel@iogearbox.net> Signed-off-by: NJakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: NSimon Horman <simon.horman@netronome.com> Acked-by: NDaniel Borkmann <daniel@iogearbox.net> Acked-by: NAlexei Starovoitov <ast@kernel.org> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 James Hogan 提交于
Update my imgtec.com and personal email address to my kernel.org one in a few places as MIPS will soon no longer be part of Imagination Technologies, and add mappings in .mailcap so get_maintainer.pl reports the right address. Signed-off-by: NJames Hogan <jhogan@kernel.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 04 10月, 2017 2 次提交
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由 Vineet Gupta 提交于
Signed-off-by: NVineet Gupta <vgupta@synopsys.com>
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由 Wouter Verhelst 提交于
nbd-general@sourceforge.net becomes nbd@other.debian.org, because sourceforge is just a spamtrap these days. Signed-off-by: NWouter Verhelst <w@uter.be> Reviewed-by: NJosef Bacik <jbacik@fb.com> Signed-off-by: NJens Axboe <axboe@kernel.dk>
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- 03 10月, 2017 2 次提交
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由 Mika Westerberg 提交于
I will be maintaining the Thunderbolt network driver along with Michael and Yehezkel. Signed-off-by: NMichael Jamet <michael.jamet@intel.com> Signed-off-by: NYehezkel Bernat <yehezkel.bernat@intel.com> Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Mika Westerberg 提交于
The new API header (include/linux/thunderbolt.h) is maintained by the Thunderbolt driver maintainers. Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: NMichael Jamet <michael.jamet@intel.com> Reviewed-by: NYehezkel Bernat <yehezkel.bernat@intel.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 26 9月, 2017 1 次提交
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由 Sean Wang 提交于
Add myself as a maintainer to support existing SoCs and push forward following MediaTek PMICs with LEDs to reuse the driver. Signed-off-by: NSean Wang <sean.wang@mediatek.com> Signed-off-by: NJacek Anaszewski <jacek.anaszewski@gmail.com>
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- 23 9月, 2017 1 次提交
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由 Stefan Schmidt 提交于
Patches for ieee802154 will go through my new trees towards netdev from now on. The 6LoWPAN subsystem will stay as is (shared between ieee802154 and bluetooth) and go through the bluetooth tree as usual. Signed-off-by: NStefan Schmidt <stefan@osg.samsung.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 20 9月, 2017 1 次提交
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由 Ariel Elior 提交于
Remove Yuval from maintaining the bnx2x & qed* modules as he is no longer working for the company. Thanks Yuval for your huge contributions and tireless efforts over the many years and various companies. Ariel Signed-off-by: NAriel Elior <aelior@cavium.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 19 9月, 2017 2 次提交
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由 Russell King 提交于
Add a maintainers entry for the Macchiatobin board. Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk> Signed-off-by: NGregory CLEMENT <gregory.clement@free-electrons.com>
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由 Eric Biggers 提交于
include/linux/fs.h and include/uapi/linux/fs.h deal with much more than just file locking. Move them to the "FILESYSTEMS (VFS and infrastructure)" section of the MAINTAINERS file so that the first suggestion from get_maintainer.pl isn't the file locking maintainers, which has caused some confusion. Cc: J. Bruce Fields <bfields@fieldses.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: NEric Biggers <ebiggers@google.com> Acked-by: NJeff Layton <jlayton@redhat.com> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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- 18 9月, 2017 2 次提交
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由 Rafael Wysocki 提交于
Andy and Mika review code changes under drivers/acpi/pmic/ on a regular basis and I rely on their help with that, so add them as code reviwewers for that part of the kernel. Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: NLee Jones <lee.jones@linaro.org> Reviewed-by: NMika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
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由 Vineet Gupta 提交于
There is no plan yet to do a v2 board. And even if we were to do it only some IPs would actually change, so it be best to add suffixes at that point, not now ! Signed-off-by: NVineet Gupta <vgupta@synopsys.com> Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>
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- 14 9月, 2017 3 次提交
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由 Thor Thayer 提交于
Add driver support for the Altera I2C Controller. The I2C controller is soft IP for use in FPGAs. Signed-off-by: NThor Thayer <thor.thayer@linux.intel.com> Reviewed-by: NAndy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: NWolfram Sang <wsa@the-dreams.de>
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由 Sergei Shtylyov 提交于
When adding myself as a reviewer for the Renesas Ethernet drivers I somehow forgot about the bindings -- I want to review them as well. Fixes: 8e6569af ("MAINTAINERS: add myself as Renesas Ethernet drivers reviewer") Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Linus Torvalds 提交于
Another merge window, another MAINTAINERS file disaster. People have serious problems with the alphabet and sorting, and poor Jérôme Glisse and Radim Krčmář get their names mangled by locale issues, turning them into some mangled mess (probably others do too, but those two stood out when sorting things again). And we now have two copies of the same 'AS3645A LED FLASH CONTROLLER DRIVER' in the tree and in the MAINTAINERS file, but that's a separate issue - the duplication is real, and I left them as two entries for the same name. This does not try to sort the actual section pattern entries, although I may end up doing that later. Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 13 9月, 2017 1 次提交
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由 Juergen Gross 提交于
Jeremy Fitzhardinge is stepping down as a paravirt maintainer. I'll replace him. While at it, update the file list to the actual pattern. Signed-off-by: NJuergen Gross <jgross@suse.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: akataria@vmware.com Cc: chrisw@sous-sol.org Cc: jeremy@goop.org Cc: rusty@rustcorp.com.au Cc: virtualization@lists.linux-foundation.org Link: http://lkml.kernel.org/r/20170905143407.9227-1-jgross@suse.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
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- 09 9月, 2017 5 次提交
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由 Robert P. J. Day 提交于
Collection of aesthetic adjustments to various PPS-related files, directories and Documentation, some quite minor just for the sake of consistency, including: * Updated example of pps device tree node (courtesy Rodolfo G.) * "PPS-API" -> "PPS API" * "pps_source_info_s" -> "pps_source_info" * "ktimer driver" -> "pps-ktimer driver" * "ppstest /dev/pps0" -> "ppstest /dev/pps1" to match example * Add missing PPS-related entries to MAINTAINERS file * Other trivialities Link: http://lkml.kernel.org/r/alpine.LFD.2.20.1708261048220.8106@localhost.localdomainSigned-off-by: NRobert P. J. Day <rpjday@crashcourse.ca> Acked-by: NRodolfo Giometti <giometti@enneenne.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Luis R. Rodriguez 提交于
In the future usermode helper users do not need to carry in all the of kmod headers declarations. Since kmod.h still includes umh.h this change has no functional changes, each umh user can be cleaned up separately later and with time. Link: http://lkml.kernel.org/r/20170810180618.22457-4-mcgrof@kernel.orgSigned-off-by: NLuis R. Rodriguez <mcgrof@kernel.org> Cc: Kees Cook <keescook@chromium.org> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: Jessica Yu <jeyu@redhat.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Michal Marek <mmarek@suse.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Miroslav Benes <mbenes@suse.cz> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Guenter Roeck <linux@roeck-us.net> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Matt Redfearn <matt.redfearn@imgtec.com> Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: Colin Ian King <colin.king@canonical.com> Cc: Daniel Mentz <danielmentz@google.com> Cc: David Binderman <dcb314@hotmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Luis R. Rodriguez 提交于
This should make it clearer what the kmod code is now that the umh code is split out separately. Link: http://lkml.kernel.org/r/20170810180618.22457-3-mcgrof@kernel.orgSigned-off-by: NLuis R. Rodriguez <mcgrof@kernel.org> Cc: Kees Cook <keescook@chromium.org> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: Jessica Yu <jeyu@redhat.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Michal Marek <mmarek@suse.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Miroslav Benes <mbenes@suse.cz> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Guenter Roeck <linux@roeck-us.net> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Matt Redfearn <matt.redfearn@imgtec.com> Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: Colin Ian King <colin.king@canonical.com> Cc: Daniel Mentz <danielmentz@google.com> Cc: David Binderman <dcb314@hotmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Luis R. Rodriguez 提交于
Patch series "kmod: few code cleanups to split out umh code" The usermode helper has a provenance from the old usb code which first required a usermode helper. Eventually this was shoved into kmod.c and the kernel's modprobe calls was converted over eventually to share the same code. Over time the list of usermode helpers in the kernel has grown -- so kmod is just but one user of the API. This series is a simple logical cleanup which acknowledges the code evolution of the usermode helper and shoves the UMH API into its own dedicated file. This way users of the API can later just include umh.h instead of kmod.h. Note despite the diff state the first patch really is just a code shove, no functional changes are done there. I did use git format-patch -M to generate the patch, but in the end the split was not enough for git to consider it a rename hence the large diffstat. I've put this through 0-day and it gives me their machine compilation blessings with all tests as OK. This patch (of 4): There's a slew of usermode helper users and kmod is just one of them. Split out the usermode helper code into its own file to keep the logic and focus split up. This change provides no functional changes. Link: http://lkml.kernel.org/r/20170810180618.22457-2-mcgrof@kernel.orgSigned-off-by: NLuis R. Rodriguez <mcgrof@kernel.org> Cc: Kees Cook <keescook@chromium.org> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: Jessica Yu <jeyu@redhat.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Michal Marek <mmarek@suse.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Miroslav Benes <mbenes@suse.cz> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Guenter Roeck <linux@roeck-us.net> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Matt Redfearn <matt.redfearn@imgtec.com> Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: Colin Ian King <colin.king@canonical.com> Cc: Daniel Mentz <danielmentz@google.com> Cc: David Binderman <dcb314@hotmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Jérôme Glisse 提交于
Patch series "HMM (Heterogeneous Memory Management)", v25. Heterogeneous Memory Management (HMM) (description and justification) Today device driver expose dedicated memory allocation API through their device file, often relying on a combination of IOCTL and mmap calls. The device can only access and use memory allocated through this API. This effectively split the program address space into object allocated for the device and useable by the device and other regular memory (malloc, mmap of a file, share memory, â) only accessible by CPU (or in a very limited way by a device by pinning memory). Allowing different isolated component of a program to use a device thus require duplication of the input data structure using device memory allocator. This is reasonable for simple data structure (array, grid, image, â) but this get extremely complex with advance data structure (list, tree, graph, â) that rely on a web of memory pointers. This is becoming a serious limitation on the kind of work load that can be offloaded to device like GPU. New industry standard like C++, OpenCL or CUDA are pushing to remove this barrier. This require a shared address space between GPU device and CPU so that GPU can access any memory of a process (while still obeying memory protection like read only). This kind of feature is also appearing in various other operating systems. HMM is a set of helpers to facilitate several aspects of address space sharing and device memory management. Unlike existing sharing mechanism that rely on pining pages use by a device, HMM relies on mmu_notifier to propagate CPU page table update to device page table. Duplicating CPU page table is only one aspect necessary for efficiently using device like GPU. GPU local memory have bandwidth in the TeraBytes/ second range but they are connected to main memory through a system bus like PCIE that is limited to 32GigaBytes/second (PCIE 4.0 16x). Thus it is necessary to allow migration of process memory from main system memory to device memory. Issue is that on platform that only have PCIE the device memory is not accessible by the CPU with the same properties as main memory (cache coherency, atomic operations, ...). To allow migration from main memory to device memory HMM provides a set of helper to hotplug device memory as a new type of ZONE_DEVICE memory which is un-addressable by CPU but still has struct page representing it. This allow most of the core kernel logic that deals with a process memory to stay oblivious of the peculiarity of device memory. When page backing an address of a process is migrated to device memory the CPU page table entry is set to a new specific swap entry. CPU access to such address triggers a migration back to system memory, just like if the page was swap on disk. HMM also blocks any one from pinning a ZONE_DEVICE page so that it can always be migrated back to system memory if CPU access it. Conversely HMM does not migrate to device memory any page that is pin in system memory. To allow efficient migration between device memory and main memory a new migrate_vma() helpers is added with this patchset. It allows to leverage device DMA engine to perform the copy operation. This feature will be use by upstream driver like nouveau mlx5 and probably other in the future (amdgpu is next suspect in line). We are actively working on nouveau and mlx5 support. To test this patchset we also worked with NVidia close source driver team, they have more resources than us to test this kind of infrastructure and also a bigger and better userspace eco-system with various real industry workload they can be use to test and profile HMM. The expected workload is a program builds a data set on the CPU (from disk, from network, from sensors, â). Program uses GPU API (OpenCL, CUDA, ...) to give hint on memory placement for the input data and also for the output buffer. Program call GPU API to schedule a GPU job, this happens using device driver specific ioctl. All this is hidden from programmer point of view in case of C++ compiler that transparently offload some part of a program to GPU. Program can keep doing other stuff on the CPU while the GPU is crunching numbers. It is expected that CPU will not access the same data set as the GPU while GPU is working on it, but this is not mandatory. In fact we expect some small memory object to be actively access by both GPU and CPU concurrently as synchronization channel and/or for monitoring purposes. Such object will stay in system memory and should not be bottlenecked by system bus bandwidth (rare write and read access from both CPU and GPU). As we are relying on device driver API, HMM does not introduce any new syscall nor does it modify any existing ones. It does not change any POSIX semantics or behaviors. For instance the child after a fork of a process that is using HMM will not be impacted in anyway, nor is there any data hazard between child COW or parent COW of memory that was migrated to device prior to fork. HMM assume a numbers of hardware features. Device must allow device page table to be updated at any time (ie device job must be preemptable). Device page table must provides memory protection such as read only. Device must track write access (dirty bit). Device must have a minimum granularity that match PAGE_SIZE (ie 4k). Reviewer (just hint): Patch 1 HMM documentation Patch 2 introduce core infrastructure and definition of HMM, pretty small patch and easy to review Patch 3 introduce the mirror functionality of HMM, it relies on mmu_notifier and thus someone familiar with that part would be in better position to review Patch 4 is an helper to snapshot CPU page table while synchronizing with concurrent page table update. Understanding mmu_notifier makes review easier. Patch 5 is mostly a wrapper around handle_mm_fault() Patch 6 add new add_pages() helper to avoid modifying each arch memory hot plug function Patch 7 add a new memory type for ZONE_DEVICE and also add all the logic in various core mm to support this new type. Dan Williams and any core mm contributor are best people to review each half of this patchset Patch 8 special case HMM ZONE_DEVICE pages inside put_page() Kirill and Dan Williams are best person to review this Patch 9 allow to uncharge a page from memory group without using the lru list field of struct page (best reviewer: Johannes Weiner or Vladimir Davydov or Michal Hocko) Patch 10 Add support to uncharge ZONE_DEVICE page from a memory cgroup (best reviewer: Johannes Weiner or Vladimir Davydov or Michal Hocko) Patch 11 add helper to hotplug un-addressable device memory as new type of ZONE_DEVICE memory (new type introducted in patch 3 of this serie). This is boiler plate code around memory hotplug and it also pick a free range of physical address for the device memory. Note that the physical address do not point to anything (at least as far as the kernel knows). Patch 12 introduce a new hmm_device class as an helper for device driver that want to expose multiple device memory under a common fake device driver. This is usefull for multi-gpu configuration. Anyone familiar with device driver infrastructure can review this. Boiler plate code really. Patch 13 add a new migrate mode. Any one familiar with page migration is welcome to review. Patch 14 introduce a new migration helper (migrate_vma()) that allow to migrate a range of virtual address of a process using device DMA engine to perform the copy. It is not limited to do copy from and to device but can also do copy between any kind of source and destination memory. Again anyone familiar with migration code should be able to verify the logic. Patch 15 optimize the new migrate_vma() by unmapping pages while we are collecting them. This can be review by any mm folks. Patch 16 add unaddressable memory migration to helper introduced in patch 7, this can be review by anyone familiar with migration code Patch 17 add a feature that allow device to allocate non-present page on the GPU when migrating a range of address to device memory. This is an helper for device driver to avoid having to first allocate system memory before migration to device memory Patch 18 add a new kind of ZONE_DEVICE memory for cache coherent device memory (CDM) Patch 19 add an helper to hotplug CDM memory Previous patchset posting : v1 http://lwn.net/Articles/597289/ v2 https://lkml.org/lkml/2014/6/12/559 v3 https://lkml.org/lkml/2014/6/13/633 v4 https://lkml.org/lkml/2014/8/29/423 v5 https://lkml.org/lkml/2014/11/3/759 v6 http://lwn.net/Articles/619737/ v7 http://lwn.net/Articles/627316/ v8 https://lwn.net/Articles/645515/ v9 https://lwn.net/Articles/651553/ v10 https://lwn.net/Articles/654430/ v11 http://www.gossamer-threads.com/lists/linux/kernel/2286424 v12 http://www.kernelhub.org/?msg=972982&p=2 v13 https://lwn.net/Articles/706856/ v14 https://lkml.org/lkml/2016/12/8/344 v15 http://www.mail-archive.com/linux-kernel@xxxxxxxxxxxxxxx/msg1304107.html v16 http://www.spinics.net/lists/linux-mm/msg119814.html v17 https://lkml.org/lkml/2017/1/27/847 v18 https://lkml.org/lkml/2017/3/16/596 v19 https://lkml.org/lkml/2017/4/5/831 v20 https://lwn.net/Articles/720715/ v21 https://lkml.org/lkml/2017/4/24/747 v22 http://lkml.iu.edu/hypermail/linux/kernel/1705.2/05176.html v23 https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1404788.html v24 https://lwn.net/Articles/726691/ This patch (of 19): This adds documentation for HMM (Heterogeneous Memory Management). It presents the motivation behind it, the features necessary for it to be useful and and gives an overview of how this is implemented. Link: http://lkml.kernel.org/r/20170817000548.32038-2-jglisse@redhat.comSigned-off-by: NJérôme Glisse <jglisse@redhat.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: David Nellans <dnellans@nvidia.com> Cc: Balbir Singh <bsingharora@gmail.com> Cc: Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Evgeny Baskakov <ebaskakov@nvidia.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Mark Hairgrove <mhairgrove@nvidia.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Sherry Cheung <SCheung@nvidia.com> Cc: Subhash Gutti <sgutti@nvidia.com> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Cc: Bob Liu <liubo95@huawei.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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