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From: "Luis R. Rodriguez" <mcgrof@kernel.org>
To: akpm@linux-foundation.org, jeyu@redhat.com, shuah@kernel.org,
	rusty@rustcorp.com.au, ebiederm@xmission.com,
	dmitry.torokhov@gmail.com, acme@redhat.com, corbet@lwn.net
Cc: martin.wilck@suse.com, mmarek@suse.com, pmladek@suse.com,
	hare@suse.com, rwright@hpe.com, jeffm@suse.com, DSterba@suse.com,
	fdmanana@suse.com, neilb@suse.com, linux@roeck-us.net,
	rgoldwyn@suse.com, subashab@codeaurora.org, xypron.glpk@gmx.de,
	keescook@chromium.org, atomlin@redhat.com, mbenes@suse.cz,
	paulmck@linux.vnet.ibm.com, dan.j.williams@intel.com,
	jpoimboe@redhat.com, davem@davemloft.net, mingo@redhat.com,
	alan@linux.intel.com, tytso@mit.edu, gregkh@linuxfoundation.org,
	torvalds@linux-foundation.org, linux-kselftest@vger.kernel.org,
	linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
	"Luis R. Rodriguez" <mcgrof@kernel.org>
Subject: [PATCH v2 0/5] kmod: help make deterministic
Date: Thu, 25 May 2017 17:16:25 -0700
Message-ID: <20170526001630.19203-1-mcgrof@kernel.org> (raw)
In-Reply-To: <20170519032444.18416-1-mcgrof@kernel.org>

On this v2 I'm following Dmitry Torokhov's recommendation from the v1 series
[0] and I stop dancing around with work arounds and try to go straight for what
I think should be a proper fix for kmod: throttle instead of failing when kmod
max concurrent threshold is reached.

This patch series depends on the unsigned int range proc sysctl changes which
Andrew Morton recently merged into his -mm tree [1].

The kmod stress test driver uses a new license (GPL on Linux, copyleft-next
outside of Linux). Linus was fine with the copyleft-next so long as it was
clear GPL applies to Linux [2] and an or clause was used if I wanted to use
copyleft-next. Later based on discussions with Alan and Ted ironed out an "or"
language clause to use [3].

All code is also available on my 20170525-kmod-throttle branch of my linux-next
tree based on tag next-20170525 [4].

If there are any questions please let me know.

[0] https://lkml.kernel.org/r/20170519032444.18416-1-mcgrof@kernel.org
[1] https://lkml.kernel.org/r/20170519033554.18592-1-mcgrof@kernel.org
[2] https://lkml.kernel.org/r/CA+55aFyhxcvD+q7tp+-yrSFDKfR0mOHgyEAe=f_94aKLsOu0Og@mail.gmail.com
[3] https://lkml.kernel.org/r/1495234558.7848.122.camel@linux.intel.com
[4] https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git/log/?h=20170525-kmod-throttle

  Luis

Luis R. Rodriguez (5):
  module: use list_for_each_entry_rcu() on find_module_all()
  kmod: reduce atomic operations on kmod_concurrent
  kmod: add test driver to stress test the module loader
  kmod: add helpers for getting kmod limit
  kmod: throttle kmod thread limit

 Documentation/sysctl/kernel.txt       |   20 +
 include/linux/kmod.h                  |    7 +
 init/main.c                           |    1 +
 kernel/kmod.c                         |   92 ++-
 kernel/module.c                       |    2 +-
 kernel/sysctl.c                       |    7 +
 lib/Kconfig.debug                     |   25 +
 lib/Makefile                          |    1 +
 lib/test_kmod.c                       | 1246 +++++++++++++++++++++++++++++++++
 tools/testing/selftests/kmod/Makefile |   11 +
 tools/testing/selftests/kmod/config   |    7 +
 tools/testing/selftests/kmod/kmod.sh  |  615 ++++++++++++++++
 12 files changed, 2004 insertions(+), 30 deletions(-)
 create mode 100644 lib/test_kmod.c
 create mode 100644 tools/testing/selftests/kmod/Makefile
 create mode 100644 tools/testing/selftests/kmod/config
 create mode 100755 tools/testing/selftests/kmod/kmod.sh

-- 
2.11.0

  parent reply index

Thread overview: 69+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-05-19  3:24 [PATCH 0/6] kmod: few simple enhancements Luis R. Rodriguez
2017-05-19  3:24 ` [PATCH 1/6] kmod: add dynamic max concurrent thread count Luis R. Rodriguez
2017-05-19 20:44   ` Dmitry Torokhov
     [not found]     ` <CAB=NE6XGL24O+JfTNUG0HO4obhDc-v+HyL0SCrQELiZrj2-qNw@mail.gmail.com>
     [not found]       ` <CAB=NE6Wa4Nemh80yaCCwbjrNRLPD+GJMncg12APg9Vq63AWVng@mail.gmail.com>
     [not found]         ` <CAB=NE6Vc6RDAytn2Pkv2V58HFo8ncR0eOHZ3===kbZ2NF78ubg@mail.gmail.com>
     [not found]           ` <CAB=NE6Vqmx=y6muenpuQKynTP=pGWMF8tzoCA0BXD6d63q9wPg@mail.gmail.com>
2017-05-19 21:58             ` Dmitry Torokhov
2017-05-25 16:22               ` Luis R. Rodriguez
2017-05-25 16:38                 ` Dmitry Torokhov
2017-05-25 16:50                   ` Luis R. Rodriguez
2017-05-25 17:30                     ` Dmitry Torokhov
2017-05-25 17:38                       ` Luis R. Rodriguez
2017-05-25 18:06                         ` Luis R. Rodriguez
2017-05-25 18:26                           ` Dmitry Torokhov
2017-05-25 19:01                             ` Luis R. Rodriguez
2017-05-25 21:38                               ` Luis R. Rodriguez
2017-05-19  3:24 ` [PATCH 2/6] module: use list_for_each_entry_rcu() on find_module_all() Luis R. Rodriguez
2017-05-23 14:46   ` Miroslav Benes
2017-05-19  3:24 ` [PATCH 3/6] kmod: provide wrappers for kmod_concurrent inc/dec Luis R. Rodriguez
2017-05-19  3:24 ` [PATCH 4/6] kmod: return -EBUSY if modprobe limit is reached Luis R. Rodriguez
2017-05-19  3:24 ` [PATCH 5/6] kmod: preempt on kmod_umh_threads_get() Luis R. Rodriguez
2017-05-19 22:27   ` Dmitry Torokhov
2017-05-25  0:14     ` Luis R. Rodriguez
2017-05-25  0:45       ` Dmitry Torokhov
2017-05-25  1:00         ` Luis R. Rodriguez
2017-05-25  2:27           ` Dmitry Torokhov
2017-05-25 11:19             ` Petr Mladek
2017-05-25 15:38               ` Luis R. Rodriguez
2017-05-25 16:42               ` Dmitry Torokhov
2017-05-25 15:18             ` Jessica Yu
2017-05-19  3:24 ` [PATCH 6/6] kmod: use simplified rate limit printk Luis R. Rodriguez
2017-05-19 22:23   ` Dmitry Torokhov
2017-05-23  9:00     ` Petr Mladek
2017-05-26  0:16 ` Luis R. Rodriguez [this message]
2017-05-26  0:16   ` [PATCH v2 1/5] module: use list_for_each_entry_rcu() on find_module_all() Luis R. Rodriguez
2017-05-26  0:16   ` [PATCH v2 2/5] kmod: reduce atomic operations on kmod_concurrent Luis R. Rodriguez
2017-05-26  1:11     ` Dmitry Torokhov
2017-05-26 20:03       ` Luis R. Rodriguez
2017-05-26  0:16   ` [PATCH v2 3/5] kmod: add test driver to stress test the module loader Luis R. Rodriguez
2017-05-26  0:16   ` [PATCH v2 4/5] kmod: add helpers for getting kmod limit Luis R. Rodriguez
2017-05-26  0:56     ` Dmitry Torokhov
2017-05-26 20:27       ` Luis R. Rodriguez
2017-05-26  0:16   ` [PATCH v2 5/5] kmod: throttle kmod thread limit Luis R. Rodriguez
2017-05-26 21:12   ` [PATCH v3 0/4] kmod: help make deterministic Luis R. Rodriguez
2017-05-26 21:12     ` [PATCH v3 1/4] module: use list_for_each_entry_rcu() on find_module_all() Luis R. Rodriguez
2017-05-26 21:12     ` [PATCH v3 2/4] kmod: reduce atomic operations on kmod_concurrent and simplify Luis R. Rodriguez
2017-06-23 19:19       ` [PATCH v4 " Luis R. Rodriguez
2017-06-26 11:36       ` [PATCH v3 " Petr Mladek
2017-05-26 21:12     ` [PATCH v3 3/4] kmod: add test driver to stress test the module loader Luis R. Rodriguez
2017-05-26 21:12     ` [PATCH v3 4/4] kmod: throttle kmod thread limit Luis R. Rodriguez
2017-06-22 15:19       ` Petr Mladek
2017-06-23 16:16         ` Luis R. Rodriguez
2017-06-23 17:56           ` Luis R. Rodriguez
2017-06-23 19:16             ` Luis R. Rodriguez
2017-06-26 10:03               ` Petr Mladek
2017-06-26  9:55           ` Petr Mladek
2017-06-23 19:20       ` [PATCH v4 " Luis R. Rodriguez
2017-06-26 11:38         ` Petr Mladek
2017-06-28 22:11           ` Luis R. Rodriguez
2017-06-20 20:56     ` [PATCH v3 0/4] kmod: help make deterministic Luis R. Rodriguez
2017-06-21  0:23       ` Kees Cook
2017-06-26 21:37         ` Jessica Yu
2017-06-26 22:44           ` Luis R. Rodriguez
2017-06-27  0:27             ` Luis R. Rodriguez
2017-06-27  8:13               ` Petr Mladek
2017-06-27 10:04                 ` Jessica Yu
2017-06-27 15:26             ` Jessica Yu
2017-06-28  0:49               ` Luis R. Rodriguez
2017-06-28 22:31     ` [PATCH v4 0/3] " Luis R. Rodriguez
2017-06-28 22:31       ` [PATCH v4 1/3] MAINTAINERS: give kmod some maintainer love Luis R. Rodriguez
2017-06-28 22:31       ` [PATCH v4 2/3] kmod: add test driver to stress test the module loader Luis R. Rodriguez
2017-06-28 22:31       ` [PATCH v4 3/3] kmod: throttle kmod thread limit Luis R. Rodriguez

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