linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: "Joel Fernandes (Google)" <joel@joelfernandes.org>
To: linux-kernel@vger.kernel.org
Cc: "Joel Fernandes (Google)" <joel@joelfernandes.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Ingo Molnar <mingo@redhat.com>,
	Josh Triplett <josh@joshtriplett.org>,
	Lai Jiangshan <jiangshanlai@gmail.com>,
	linux-mm@kvack.org,
	Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
	"Paul E. McKenney" <paulmck@kernel.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
	rcu@vger.kernel.org, Steven Rostedt <rostedt@goodmis.org>,
	"Uladzislau Rezki (Sony)" <urezki@gmail.com>
Subject: [PATCH 00/18] kfree_rcu() improvements for -rcu dev
Date: Sun, 29 Mar 2020 22:32:30 -0400	[thread overview]
Message-ID: <20200330023248.164994-1-joel@joelfernandes.org> (raw)

Hello,
These patches improve kfree_rcu() to support:
- kfree_rcu() headless usage.
- both vmalloc() and slab free'ing support using array of pointers.
- simpler debugobjects handling.

It applies on rcu/dev branch as of March 29th.

Testing with rcuperf shows following changes. The memory footprint reduces and
batches go slightly up. This is assumed an acceptable change.

with all patches:
Total time taken by all kfree'ers: 27312964461 ns, loops: 20000, batches: 3120, memory footprint: 211MB
Total time taken by all kfree'ers: 26773272309 ns, loops: 20000, batches: 3084, memory footprint: 208M

without:
Total time taken by all kfree'ers: 25711621811 ns, loops: 20000, batches: 2814, memory footprint: 230MB          
 Total time taken by all kfree'ers: 25775800546 ns, loops: 20000, batches: 2755, memory footprint: 230MB

These have been pushed to the git tree at:
git://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux.git (branch rcu/kfree)

cgit view:
https://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux.git/log/?h=rcu/kfree

thanks,

 - Joel

Joel Fernandes (Google) (5):
rcu/tree: Simplify debug_objects handling
rcu/tree: Clarify emergency path comment better
rcu/tree: Remove extra next variable in kfree worker function
rcu/tree: Simplify is_vmalloc_addr expression
rcu/tree: Make kvfree_rcu() tolerate any alignment

Uladzislau Rezki (Sony) (13):
mm/list_lru.c: Rename kvfree_rcu() to local variant
rcu: Introduce kvfree_rcu() interface
rcu: Rename rcu_invoke_kfree_callback/rcu_kfree_callback
rcu: Rename __is_kfree_rcu_offset() macro
rcu: Rename kfree_call_rcu() to the kvfree_call_rcu().
mm/list_lru.c: Remove kvfree_rcu_local() function
rcu/tree: Simplify KFREE_BULK_MAX_ENTR macro
rcu/tree: Maintain separate array for vmalloc ptrs
rcu/tree: Introduce expedited_drain flag
rcu/tree: Support reclaim for head-less object
rcu/tiny: Move kvfree_call_rcu() out of header
rcu/tiny: Support reclaim for head-less object
rcu: Support headless variant in the kvfree_rcu()

include/linux/rcupdate.h   |  53 ++++++-
include/linux/rcutiny.h    |   6 +-
include/linux/rcutree.h    |   2 +-
include/trace/events/rcu.h |   8 +-
kernel/rcu/tiny.c          | 168 +++++++++++++++++++-
kernel/rcu/tree.c          | 315 ++++++++++++++++++++++++++-----------
mm/list_lru.c              |  11 +-
7 files changed, 443 insertions(+), 120 deletions(-)

--
2.26.0.rc2.310.g2932bb562d-goog


             reply	other threads:[~2020-03-30  2:33 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-30  2:32 Joel Fernandes (Google) [this message]
2020-03-30  2:32 ` [PATCH 01/18] mm/list_lru.c: Rename kvfree_rcu() to local variant Joel Fernandes (Google)
2020-03-30  2:32 ` [PATCH 02/18] rcu: Introduce kvfree_rcu() interface Joel Fernandes (Google)
2020-03-30  2:32 ` [PATCH 03/18] rcu: Rename rcu_invoke_kfree_callback/rcu_kfree_callback Joel Fernandes (Google)
2020-03-30  2:32 ` [PATCH 04/18] rcu: Rename __is_kfree_rcu_offset() macro Joel Fernandes (Google)
2020-03-30  2:32 ` [PATCH 05/18] rcu: Rename kfree_call_rcu() to the kvfree_call_rcu() Joel Fernandes (Google)
2020-03-30  2:32 ` [PATCH 06/18] mm/list_lru.c: Remove kvfree_rcu_local() function Joel Fernandes (Google)
2020-03-30  2:32 ` [PATCH 07/18] rcu/tree: Simplify debug_objects handling Joel Fernandes (Google)
2020-03-30  7:00   ` kbuild test robot
2020-03-30 18:42     ` Joel Fernandes
2020-03-30  2:32 ` [PATCH 08/18] rcu/tree: Clarify emergency path comment better Joel Fernandes (Google)
2020-03-30  2:32 ` [PATCH 09/18] rcu/tree: Simplify KFREE_BULK_MAX_ENTR macro Joel Fernandes (Google)
2020-03-30  2:32 ` [PATCH 10/18] rcu/tree: Maintain separate array for vmalloc ptrs Joel Fernandes (Google)
2020-03-30  6:48   ` kbuild test robot
2020-03-30  9:10   ` kbuild test robot
2020-03-30 15:29     ` Uladzislau Rezki
2020-03-30 15:31       ` Matthew Wilcox
2020-03-30 15:37         ` Paul E. McKenney
2020-03-30 17:16           ` Joel Fernandes
2020-03-30 17:43             ` Uladzislau Rezki
2020-03-30 18:21               ` Paul E. McKenney
2020-03-30  2:32 ` [PATCH 11/18] rcu/tree: Introduce expedited_drain flag Joel Fernandes (Google)
2020-03-30  2:32 ` [PATCH 12/18] rcu/tree: Support reclaim for head-less object Joel Fernandes (Google)
2020-03-30  2:32 ` [PATCH 13/18] rcu/tiny: Move kvfree_call_rcu() out of header Joel Fernandes (Google)
2020-03-30  2:32 ` [PATCH 14/18] rcu/tiny: Support reclaim for head-less object Joel Fernandes (Google)
2020-03-30  2:32 ` [PATCH 15/18] rcu: Support headless variant in the kvfree_rcu() Joel Fernandes (Google)
2020-03-30  2:32 ` [PATCH 16/18] rcu/tree: Remove extra next variable in kfree worker function Joel Fernandes (Google)
2020-03-30  2:32 ` [PATCH 17/18] rcu/tree: Simplify is_vmalloc_addr expression Joel Fernandes (Google)
2020-03-30  2:32 ` [PATCH 18/18] rcu/tree: Make kvfree_rcu() tolerate any alignment Joel Fernandes (Google)

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=20200330023248.164994-1-joel@joelfernandes.org \
    --to=joel@joelfernandes.org \
    --cc=akpm@linux-foundation.org \
    --cc=jiangshanlai@gmail.com \
    --cc=josh@joshtriplett.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=mathieu.desnoyers@efficios.com \
    --cc=mingo@redhat.com \
    --cc=paulmck@kernel.org \
    --cc=rafael.j.wysocki@intel.com \
    --cc=rcu@vger.kernel.org \
    --cc=rostedt@goodmis.org \
    --cc=urezki@gmail.com \
    --subject='Re: [PATCH 00/18] kfree_rcu() improvements for -rcu dev' \
    /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).