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Message-ID: <20150811170343.GA26881@redhat.com>
Date: Tue, 11 Aug 2015 19:03:43 +0200
From: Oleg Nesterov <oleg@...hat.com>
To: Al Viro <viro@...iv.linux.org.uk>,
Dave Chinner <david@...morbit.com>,
Dave Hansen <dave.hansen@...ux.intel.com>,
Jan Kara <jack@...e.cz>
Cc: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
Peter Zijlstra <peterz@...radead.org>,
linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/8] change sb_writers to use percpu_rw_semaphore
Jan, please consider this series. I didn't dare to preserve your acks,
I hope you can ack v2 too.
The only essential change is that I dropped the lockdep improvements
as we discussed. This means that 8/8 was changed a bit, and I decided
to add the new documentation patch, see 3/8.
6/8 is new too, I forgot to do this in V1.
To remind, I tested this with the following script:
dd if=/dev/zero of=TEST.img bs=1MiB count=4000
dd if=/dev/zero of=SCRATCH.img bs=1MiB count=4000
losetup --find --show TEST.img
losetup --find --show SCRATCH.img
mkfs.xfs -f /dev/loop0
mkfs.xfs -f /dev/loop1
mkdir -p TEST SCRATCH
mount /dev/loop0 TEST
mount /dev/loop1 SCRATCH
TEST_DEV=/dev/loop0 TEST_DIR=TEST SCRATCH_DEV=/dev/loop1 SCRATCH_MNT=SCRATCH \
./check `grep -il freeze tests/*/???`
seems to work:
Ran: generic/068 generic/085 generic/280 generic/311 xfs/011 xfs/119 xfs/297
Passed all 7 tests
and I see nothing interesting in dmesg.
If I replace mkfs.xfs above with mkfs.btrfs or mkfs.ext4 everything
looks fine too:
FSTYP -- btrfs
PLATFORM -- Linux/x86_64 intel-canoepass-10 4.2.0-rc6+
MKFS_OPTIONS -- /dev/loop1
MOUNT_OPTIONS -- -o context=system_u:object_r:nfs_t:s0 /dev/loop1 SCRATCH
generic/068 60s ... 53s
generic/085 24s ... 16s
generic/280 2s ... [not run] disk quotas not supported by this filesystem type: btrfs
generic/311 165s ... 136s
xfs/011 20s ... [not run] not suitable for this filesystem type: btrfs
xfs/119 22s ... [not run] not suitable for this filesystem type: btrfs
xfs/297 270s ... [not run] not suitable for this filesystem type: btrfs
Ran: generic/068 generic/085 generic/311
Not run: generic/280 xfs/011 xfs/119 xfs/297
Passed all 3 tests
and
FSTYP -- ext4
PLATFORM -- Linux/x86_64 intel-canoepass-10 4.2.0-rc6+
MKFS_OPTIONS -- /dev/loop1
MOUNT_OPTIONS -- -o acl,user_xattr -o context=system_u:object_r:nfs_t:s0 /dev/loop1 SCRATCH
generic/068 53s ... 52s
generic/085 16s ... 8s
generic/280 2s ... 4s
generic/311 136s ... 173s
xfs/011 20s ... [not run] not suitable for this filesystem type: ext4
xfs/119 22s ... [not run] not suitable for this filesystem type: ext4
xfs/297 270s ... [not run] not suitable for this filesystem type: ext4
Ran: generic/068 generic/085 generic/280 generic/311
Not run: xfs/011 xfs/119 xfs/297
Passed all 4 tests
Oleg.
arch/Kconfig | 1 -
fs/btrfs/transaction.c | 8 +--
fs/super.c | 167 ++++++++++++++++++-----------------------
fs/xfs/xfs_aops.c | 6 +-
include/linux/fs.h | 23 +++---
include/linux/percpu-rwsem.h | 20 +++++
init/Kconfig | 1 -
kernel/locking/Makefile | 3 +-
kernel/locking/percpu-rwsem.c | 13 +++
lib/Kconfig | 3 -
10 files changed, 122 insertions(+), 123 deletions(-)
--
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