XFS development tree branch, master, updated. for-linus-v3.11-rc1-2-12211-g00574da
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The branch, master has been updated
00574da xfs: introduce object readahead to log recovery 8d1d408 xfs: Simplify xfs_ail_min() with list_first_entry_or_null() 46677e6 xfs: Register hotcpu notifier after initialization
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- Log ----------------------------------------------------------------- commit 00574da199291751bfaaee15ad0f42a7144276ad
Author: Zhi Yong Wu <[email protected]> Date: Wed Aug 14 15:16:03 2013 +0800
xfs: introduce object readahead to log recovery
It can take a long time to run log recovery operation because it is
single threaded and is bound by read latency. We can find that it took most of the time to wait for the read IO to occur, so if one object readahead is introduced to log recovery, it will obviously reduce the log recovery time.
Log recovery time stat:
w/o this patch w/ this patch
real: 0m15.023s 0m7.802s
user: 0m0.001s 0m0.001s
sys: 0m0.246s 0m0.107s
commit 8d1d40832b1c53ae73931f1b536ce1ab7375b3c8
Author: Jie Liu <[email protected]> Date: Thu Aug 15 13:08:35 2013 +0800
xfs: Simplify xfs_ail_min() with list_first_entry_or_null()
At xfs_ail_min(), we do check if the AIL list is empty or not before returning the first item in it with list_empty() and list_first_entry().
This can be simplified a bit with a new list operation routine that is the list_first_entry_or_null() which has been introduced by:
commit 6d7581e62f8be462440d7b22c6361f7c9fa4902b
list: introduce list_first_entry_or_null
v2: make xfs_ail_min() as a static inline function and move it to
xfs_trans_priv.h as per Dave Chinner's comments.
commit 46677e679fba8c2db7c94a7142ad9abb72192ebc
Author: Richard Weinberger <[email protected]> Date: Mon Aug 19 22:56:44 2013 +0200
xfs: Register hotcpu notifier after initialization
Currently the code initializizes mp->m_icsb_mutex and other things _after_ register_hotcpu_notifier().
As the notifier takes mp->m_icsb_mutex it can happen that it takes the lock before it's initialization.
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Summary of changes:
fs/xfs/xfs_log_recover.c | 159 ++++++++++++++++++++++++++++++++++++++++++++--- fs/xfs/xfs_mount.c | 13 ++-- fs/xfs/xfs_trans_ail.c | 14 ----- fs/xfs/xfs_trans_priv.h | 12 ++++ 4 files changed, 171 insertions(+), 27 deletions(-)
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