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| author | Nicolai Stange <nicstange@gmail.com> | 2015-08-06 15:46:16 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-08-07 04:39:40 +0300 |
| commit | d3cd131d935ab3bab700491edbbd7cad4040ce50 (patch) | |
| tree | 50d9755ae9dfbb3105761b3f87e37fe9454d7a1b /init/main.c | |
| parent | 7ace99170789bc53cbb7e9e352d7a3851208fbcf (diff) | |
| download | linux-d3cd131d935ab3bab700491edbbd7cad4040ce50.tar.bz2 | |
mm, meminit: replace rwsem with completion
Commit 0e1cc95b4cc7 ("mm: meminit: finish initialisation of struct pages
before basic setup") introduced a rwsem to signal completion of the
initialization workers.
Lockdep complains about possible recursive locking:
=============================================
[ INFO: possible recursive locking detected ]
4.1.0-12802-g1dc51b8 #3 Not tainted
---------------------------------------------
swapper/0/1 is trying to acquire lock:
(pgdat_init_rwsem){++++.+},
at: [<ffffffff8424c7fb>] page_alloc_init_late+0xc7/0xe6
but task is already holding lock:
(pgdat_init_rwsem){++++.+},
at: [<ffffffff8424c772>] page_alloc_init_late+0x3e/0xe6
Replace the rwsem by a completion together with an atomic
"outstanding work counter".
[peterz@infradead.org: Barrier removal on the grounds of being pointless]
[mgorman@suse.de: Applied review feedback]
Signed-off-by: Nicolai Stange <nicstange@gmail.com>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Alex Ng <alexng@microsoft.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'init/main.c')
0 files changed, 0 insertions, 0 deletions