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Message-Id: <20200608005729.1874024-1-a.darwish@linutronix.de>
Date: Mon, 8 Jun 2020 02:57:11 +0200
From: "Ahmed S. Darwish" <a.darwish@...utronix.de>
To: Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>
Cc: Thomas Gleixner <tglx@...utronix.de>,
"Paul E. McKenney" <paulmck@...nel.org>,
"Sebastian A. Siewior" <bigeasy@...utronix.de>,
Steven Rostedt <rostedt@...dmis.org>,
LKML <linux-kernel@...r.kernel.org>,
"Ahmed S. Darwish" <a.darwish@...utronix.de>,
Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
dri-devel@...ts.freedesktop.org,
"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
Jens Axboe <axboe@...nel.dk>, linux-block@...r.kernel.org,
Alexander Viro <viro@...iv.linux.org.uk>,
linux-fsdevel@...r.kernel.org
Subject: [PATCH v2 00/18] seqlock: Extend seqcount API with associated locks
Hi,
This is v2 of the seqlock patch series:
[PATCH v1 00/25] seqlock: Extend seqcount API with associated locks
https://lore.kernel.org/lkml/20200519214547.352050-1-a.darwish@linutronix.de
Patches 1=>3 of this v2 series add documentation for the existing
seqlock.h datatypes and APIs. Hopefully they can hit v5.8 -rc2 or -rc3.
Changelog-v2
============
1. Drop, for now, the seqlock v1 patches #7 and #8. These patches added
lockdep non-preemptibility checks to seqcount_t write paths, but they
now depend on on-going work by Peter:
[PATCH v3 0/5] lockdep: Change IRQ state tracking to use per-cpu variables
https://lkml.kernel.org/r/20200529213550.683440625@infradead.org
[PATCH 00/14] x86/entry: disallow #DB more and x86/entry lockdep/nmi
https://lkml.kernel.org/r/20200529212728.795169701@infradead.org
Once Peter's work get merged, I'll send the non-preemptibility checks as
a separate series.
2. Drop the v1 seqcount_t call-sites bugfixes. I've already posted them
in an isolated series. They got merged into their respective trees, and
will hit v5.8-rc1 soon:
[PATCH v2 0/6] seqlock: seqcount_t call sites bugfixes
https://lore.kernel.org/lkml/20200603144949.1122421-1-a.darwish@linutronix.de
3. Patch #1: Add a small paragraph explaining that seqcount_t/seqlock_t
cannot be used if the protected data contains pointers. A similar
paragraph already existed in seqlock.h, but got mistakenly dropped.
4. Patch #2: Don't add RST directives inside kernel-doc comments. Peter
doesn't like them :) I've kept the indentation though, and found a
minimal way for Sphinx to properly render these code samples without too
much disruption.
5. Patch #3: Brush up the introduced kernel-doc comments. Make them more
consistent overall, and more concise.
Thanks,
8<--------------
Ahmed S. Darwish (18):
Documentation: locking: Describe seqlock design and usage
seqlock: Properly format kernel-doc code samples
seqlock: Add missing kernel-doc annotations
seqlock: Extend seqcount API with associated locks
dma-buf: Remove custom seqcount lockdep class key
dma-buf: Use sequence counter with associated wound/wait mutex
sched: tasks: Use sequence counter with associated spinlock
netfilter: conntrack: Use sequence counter with associated spinlock
netfilter: nft_set_rbtree: Use sequence counter with associated rwlock
xfrm: policy: Use sequence counters with associated lock
timekeeping: Use sequence counter with associated raw spinlock
vfs: Use sequence counter with associated spinlock
raid5: Use sequence counter with associated spinlock
iocost: Use sequence counter with associated spinlock
NFSv4: Use sequence counter with associated spinlock
userfaultfd: Use sequence counter with associated spinlock
kvm/eventfd: Use sequence counter with associated spinlock
hrtimer: Use sequence counter with associated raw spinlock
Documentation/locking/index.rst | 1 +
Documentation/locking/seqlock.rst | 242 +++++
MAINTAINERS | 2 +-
block/blk-iocost.c | 5 +-
drivers/dma-buf/dma-resv.c | 15 +-
.../gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 2 -
drivers/md/raid5.c | 2 +-
drivers/md/raid5.h | 2 +-
fs/dcache.c | 2 +-
fs/fs_struct.c | 4 +-
fs/nfs/nfs4_fs.h | 2 +-
fs/nfs/nfs4state.c | 2 +-
fs/userfaultfd.c | 4 +-
include/linux/dcache.h | 2 +-
include/linux/dma-resv.h | 4 +-
include/linux/fs_struct.h | 2 +-
include/linux/hrtimer.h | 2 +-
include/linux/kvm_irqfd.h | 2 +-
include/linux/sched.h | 2 +-
include/linux/seqlock.h | 855 ++++++++++++++----
include/linux/seqlock_types_internal.h | 187 ++++
include/net/netfilter/nf_conntrack.h | 2 +-
init/init_task.c | 3 +-
kernel/fork.c | 2 +-
kernel/time/hrtimer.c | 13 +-
kernel/time/timekeeping.c | 19 +-
net/netfilter/nf_conntrack_core.c | 5 +-
net/netfilter/nft_set_rbtree.c | 4 +-
net/xfrm/xfrm_policy.c | 10 +-
virt/kvm/eventfd.c | 2 +-
30 files changed, 1175 insertions(+), 226 deletions(-)
create mode 100644 Documentation/locking/seqlock.rst
create mode 100644 include/linux/seqlock_types_internal.h
base-commit: 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162
--
2.20.1
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