LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Yuyang Du <duyuyang@gmail.com>
To: peterz@infradead.org, will.deacon@arm.com, mingo@kernel.org
Cc: bvanassche@acm.org, ming.lei@redhat.com, frederic@kernel.org,
	tglx@linutronix.de, boqun.feng@gmail.com,
	linux-kernel@vger.kernel.org, Yuyang Du <duyuyang@gmail.com>
Subject: [PATCH 00/17] Support for read-write lock deadlock detection
Date: Mon, 13 May 2019 17:11:46 +0800	[thread overview]
Message-ID: <20190513091203.7299-1-duyuyang@gmail.com> (raw)

Hi Peter and Ingo,

Historically, the read-write locks (recursive-read locks included) are not
well supported in lockdep. This patchset attempts to solve this problem
sound and complete.

The bulk of the algorithm is in patch #10, which is actually not complex at
all. Hopefully, it simply works.

Now that we have read-write locks suppported, we have all the 262 cases
passed, though I have to flip some cases which, I think, are wrong.

P.S. To Boqun, I haven't got time to read your patchset except that I did
carefully read your design doc and learnt from it a lot. It is helpful.
Please give this patchset at least a look.

Thanks,
Yuyang

--

Yuyang Du (17):
  locking/lockdep: Add lock type enum to explicitly specify read or
    write locks
  locking/lockdep: Add read-write type for dependency
  locking/lockdep: Add helper functions to operate on the searched path
  locking/lockdep: Update direct dependency's read-write type if it
    exists
  locking/lockdep: Rename deadlock check functions
  locking/lockdep: Adjust BFS algorithm to support multiple matches
  locking/lockdep: Introduce mark_lock_unaccessed()
  locking/lockdep: Introduce chain_hlocks_type for held lock's
    read-write type
  locking/lockdep: Hash held lock's read-write type into chain key
  locking/lockdep: Support read-write lock's deadlock detection
  locking/lockdep: Adjust lockdep selftest cases
  locking/lockdep: Remove useless lock type assignment
  locking/lockdep: Add nest lock type
  locking/lockdep: Support recursive read locks
  locking/lockdep: Adjust selftest case for recursive read lock
  locking/lockdep: Add more lockdep selftest cases
  locking/lockdep: Remove irq-safe to irq-unsafe read check

 include/linux/lockdep.h            |   40 +-
 kernel/locking/lockdep.c           |  454 +++++++++++----
 kernel/locking/lockdep_internals.h |    4 +
 lib/locking-selftest.c             | 1099 +++++++++++++++++++++++++++++++++++-
 4 files changed, 1464 insertions(+), 133 deletions(-)

-- 
1.8.3.1


             reply	other threads:[~2019-05-13  9:13 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-13  9:11 Yuyang Du [this message]
2019-05-13  9:11 ` [PATCH 01/17] locking/lockdep: Add lock type enum to explicitly specify read or write locks Yuyang Du
2019-05-13 11:45   ` Peter Zijlstra
2019-05-14  1:31     ` Yuyang Du
2019-05-14 12:04       ` Peter Zijlstra
2019-05-13  9:11 ` [PATCH 02/17] locking/lockdep: Add read-write type for dependency Yuyang Du
2019-05-13  9:11 ` [PATCH 03/17] locking/lockdep: Add helper functions to operate on the searched path Yuyang Du
2019-05-13  9:11 ` [PATCH 04/17] locking/lockdep: Update direct dependency's read-write type if it exists Yuyang Du
2019-05-13  9:11 ` [PATCH 05/17] locking/lockdep: Rename deadlock check functions Yuyang Du
2019-05-13  9:11 ` [PATCH 06/17] locking/lockdep: Adjust BFS algorithm to support multiple matches Yuyang Du
2019-05-13  9:11 ` [PATCH 07/17] locking/lockdep: Introduce mark_lock_unaccessed() Yuyang Du
2019-05-13  9:11 ` [PATCH 08/17] locking/lockdep: Introduce chain_hlocks_type for held lock's read-write type Yuyang Du
2019-05-13  9:11 ` [PATCH 09/17] locking/lockdep: Hash held lock's read-write type into chain key Yuyang Du
2019-05-13  9:11 ` [PATCH 10/17] locking/lockdep: Support read-write lock's deadlock detection Yuyang Du
2019-05-13  9:11 ` [PATCH 11/17] locking/lockdep: Adjust lockdep selftest cases Yuyang Du
2019-05-13  9:11 ` [PATCH 12/17] locking/lockdep: Remove useless lock type assignment Yuyang Du
2019-05-13  9:11 ` [PATCH 13/17] locking/lockdep: Add nest lock type Yuyang Du
2019-05-13  9:12 ` [PATCH 14/17] locking/lockdep: Support recursive read locks Yuyang Du
2019-05-13  9:12 ` [PATCH 15/17] locking/lockdep: Adjust selftest case for recursive read lock Yuyang Du
2019-05-13  9:12 ` [PATCH 16/17] locking/lockdep: Add more lockdep selftest cases Yuyang Du
2019-05-13  9:12 ` [PATCH 17/17] locking/lockdep: Remove irq-safe to irq-unsafe read check Yuyang Du
2019-05-13  9:17 ` [PATCH 00/17] Support for read-write lock deadlock detection Yuyang Du

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20190513091203.7299-1-duyuyang@gmail.com \
    --to=duyuyang@gmail.com \
    --cc=boqun.feng@gmail.com \
    --cc=bvanassche@acm.org \
    --cc=frederic@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=ming.lei@redhat.com \
    --cc=mingo@kernel.org \
    --cc=peterz@infradead.org \
    --cc=tglx@linutronix.de \
    --cc=will.deacon@arm.com \
    --subject='Re: [PATCH 00/17] Support for read-write lock deadlock detection' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).