linux-kernel - [PATCH 0/2] rcu: Transform kfree_rcu() into kvfree

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Date:   Tue, 06 Feb 2018 13:19:29 +0300
From:   Kirill Tkhai <ktkhai@...tuozzo.com>
To:     paulmck@...ux.vnet.ibm.com, josh@...htriplett.org,
        rostedt@...dmis.org, mathieu.desnoyers@...icios.com,
        jiangshanlai@...il.com, mingo@...hat.com, cl@...ux.com,
        penberg@...nel.org, rientjes@...gle.com, iamjoonsoo.kim@....com,
        akpm@...ux-foundation.org, ktkhai@...tuozzo.com,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: [PATCH 0/2] rcu: Transform kfree_rcu() into kvfree_rcu()

Recent times kvmalloc() begun widely be used in kernel.
Some of such memory allocations have to be freed after
rcu grace period, and this patchset introduces a generic
primitive for doing this.

Actually, everything is made in [1/2]. Patch [2/2] is just
added to make new kvfree_rcu() have the first user.

The patch [1/2] transforms kfree_rcu(), its sub definitions
and its sub functions into kvfree_rcu() form. The most
significant change is in __rcu_reclaim(), where kvfree()
is used instead of kfree(). Since kvfree() is able to
have a deal with memory allocated via kmalloc(), vmalloc()
and kvmalloc(); kfree_rcu() and vfree_rcu() may simply
be defined through this new kvfree_rcu().

---

Kirill Tkhai (2):
      rcu: Transform kfree_rcu() into kvfree_rcu()
      mm: Use kvfree_rcu() in update_memcg_params()

 include/linux/rcupdate.h   |   31 +++++++++++++++++--------------
 include/linux/rcutiny.h    |    4 ++--
 include/linux/rcutree.h    |    2 +-
 include/trace/events/rcu.h |   12 ++++++------
 kernel/rcu/rcu.h           |    8 ++++----
 kernel/rcu/tree.c          |   14 +++++++-------
 kernel/rcu/tree_plugin.h   |   10 +++++-----
 mm/slab_common.c           |   10 +---------
 8 files changed, 43 insertions(+), 48 deletions(-)

--
Signed-off-by: Kirill Tkhai <ktkhai@...tuozzo.com>