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From: Jeff Hostetler <git@jeffhostetler.com>
To: martin.agren@gmail.com
Cc: git@vger.kernel.org, jeffhost@microsoft.com, gitster@pobox.com,
	peff@peff.net
Subject: [PATCH] hashmap: address ThreadSanitizer concerns
Date: Wed, 30 Aug 2017 18:59:21 +0000	[thread overview]
Message-ID: <20170830185922.10107-1-git@jeffhostetler.com> (raw)
In-Reply-To: <adb37b70139fd1e2bac18bfd22c8b96683ae18eb.1502780344.git.martin.agren@gmail.com>

From: Jeff Hostetler <jeffhost@microsoft.com>

This is to address concerns raised by ThreadSanitizer on the
mailing list about threaded unprotected R/W access to map.size with my previous
"disallow rehash" change (0607e10009ee4e37cb49b4cec8d28a9dda1656a4).

See:
https://public-inbox.org/git/adb37b70139fd1e2bac18bfd22c8b96683ae18eb.1502780344.git.martin.agren@gmail.com/

TODO  This version contains methods to disable item counting and automatic
rehashing independently.  Since the latter is implicit with the former, we
could get by with just the one, but I thought we could discuss it since it
does provide a little extra clarity of intent.


Jeff Hostetler (1):
  hashmap: add API to disable item counting when threaded

 attr.c                  | 14 ++++---
 builtin/describe.c      |  2 +-
 hashmap.c               | 31 +++++++++++-----
 hashmap.h               | 98 ++++++++++++++++++++++++++++++++++++++-----------
 name-hash.c             |  6 ++-
 t/helper/test-hashmap.c |  2 +-
 6 files changed, 113 insertions(+), 40 deletions(-)

-- 
2.9.3


  parent reply	other threads:[~2017-08-30 18:59 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-08-15 12:53 [PATCH/RFC 0/5] Some ThreadSanitizer-results Martin Ågren
2017-08-15 12:53 ` [PATCH 1/5] convert: initialize attr_action in convert_attrs Martin Ågren
2017-08-15 14:17   ` Torsten Bögershausen
2017-08-15 14:29     ` Torsten Bögershausen
2017-08-15 14:40     ` Martin Ågren
2017-08-15 12:53 ` [PATCH 2/5] pack-objects: take lock before accessing `remaining` Martin Ågren
2017-08-15 19:50   ` Johannes Sixt
2017-08-15 12:53 ` [PATCH 3/5] Makefile: define GIT_THREAD_SANITIZER Martin Ågren
2017-08-15 12:53 ` [PATCH 4/5] strbuf_reset: don't write to slopbuf with ThreadSanitizer Martin Ågren
2017-08-15 18:43   ` Junio C Hamano
2017-08-15 19:06     ` Martin Ågren
2017-08-15 19:19       ` Junio C Hamano
2017-08-15 12:53 ` [PATCH 5/5] ThreadSanitizer: add suppressions Martin Ågren
2017-08-15 12:53 ` tsan: t3008: hashmap_add touches size from multiple threads Martin Ågren
2017-08-15 17:59   ` Jeff Hostetler
2017-08-15 18:17     ` Stefan Beller
2017-08-15 18:40       ` Martin Ågren
2017-08-15 18:48         ` Stefan Beller
2017-08-15 19:21           ` Martin Ågren
2017-08-15 20:46             ` Jeff Hostetler
2017-08-30 18:59   ` Jeff Hostetler [this message]
2017-08-30 18:59     ` [PATCH] hashmap: add API to disable item counting when threaded Jeff Hostetler
2017-09-01 23:31       ` Johannes Schindelin
2017-09-01 23:50         ` Jonathan Nieder
2017-09-05 16:39           ` Jeff Hostetler
2017-09-05 17:13             ` Martin Ågren
2017-09-02  8:17         ` Jeff King
2017-09-04 15:59           ` Johannes Schindelin
2017-09-05 16:54           ` Jeff Hostetler
2017-09-06  3:43           ` Junio C Hamano
2017-09-05 16:33         ` Jeff Hostetler
2017-09-02  8:05       ` Jeff King
2017-09-05 17:07         ` Jeff Hostetler
2017-09-02  8:39       ` Simon Ruderich
2017-09-06  1:24       ` Junio C Hamano
2017-09-06 15:33         ` Jeff Hostetler
2017-09-06 15:43     ` [PATCH v2] hashmap: address ThreadSanitizer concerns Jeff Hostetler
2017-09-06 15:43       ` [PATCH v2] hashmap: add API to disable item counting when threaded Jeff Hostetler
2017-08-15 12:53 ` tsan: t5400: set_try_to_free_routine Martin Ågren
2017-08-15 17:35   ` Stefan Beller
2017-08-15 18:44     ` Martin Ågren
2017-08-17 10:57   ` Jeff King
2017-08-20 10:06 ` [PATCH/RFC 0/5] Some ThreadSanitizer-results Jeff King
2017-08-20 10:45   ` Martin Ågren
2017-08-21 17:43 ` [PATCH v2 0/4] " Martin Ågren
2017-08-21 17:43   ` [PATCH v2 1/4] convert: always initialize attr_action in convert_attrs Martin Ågren
2017-08-21 17:43   ` [PATCH v2 2/4] pack-objects: take lock before accessing `remaining` Martin Ågren
2017-08-21 17:43   ` [PATCH v2 3/4] strbuf_setlen: don't write to strbuf_slopbuf Martin Ågren
2017-08-23 17:24     ` Junio C Hamano
2017-08-23 17:43       ` Martin Ågren
2017-08-23 18:30         ` Junio C Hamano
2017-08-23 20:37     ` Brandon Casey
2017-08-23 21:04       ` Junio C Hamano
2017-08-23 21:20         ` Brandon Casey
2017-08-23 21:54           ` Brandon Casey
2017-08-23 22:11             ` Brandon Casey
2017-08-24 16:52             ` Junio C Hamano
2017-08-24 18:29               ` Brandon Casey
2017-08-24 19:16                 ` Martin Ågren
2017-08-23 22:24           ` Junio C Hamano
2017-08-23 22:39             ` Brandon Casey
2017-08-21 17:43   ` [PATCH v2 4/4] ThreadSanitizer: add suppressions Martin Ågren
2017-08-25 17:04     ` Jeff King
2017-08-28 20:56   ` [PATCH v2 0/4] Some ThreadSanitizer-results Jeff Hostetler

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