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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2014-12-04 07:47:26 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2014-12-05 20:51:04 +0300 |
| commit | 769ec6e5b7d4a8115447736871be8bffaaba3a7d (patch) | |
| tree | 94e1062ffee03b4dc980da82c2da4ec06916b997 /fs/f2fs/segment.c | |
| parent | 8b26ef98da3387eb57a8a5c1747c6e628948ee0c (diff) | |
| download | linux-769ec6e5b7d4a8115447736871be8bffaaba3a7d.tar.xz | |
f2fs: call radix_tree_preload before radix_tree_insert
This patch tries to fix:
BUG: using smp_processor_id() in preemptible [00000000] code: f2fs_gc-254:0/384
(radix_tree_node_alloc+0x14/0x74) from [<c033d8a0>] (radix_tree_insert+0x110/0x200)
(radix_tree_insert+0x110/0x200) from [<c02e8264>] (gc_data_segment+0x340/0x52c)
(gc_data_segment+0x340/0x52c) from [<c02e8658>] (f2fs_gc+0x208/0x400)
(f2fs_gc+0x208/0x400) from [<c02e8a98>] (gc_thread_func+0x248/0x28c)
(gc_thread_func+0x248/0x28c) from [<c0139944>] (kthread+0xa0/0xac)
(kthread+0xa0/0xac) from [<c0105ef8>] (ret_from_fork+0x14/0x3c)
The reason is that f2fs calls radix_tree_insert under enabled preemption.
So, before calling it, we need to call radix_tree_preload.
Otherwise, we should use _GFP_WAIT for the radix tree, and use mutex or
semaphore to cover the radix tree operations.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/segment.c')
0 files changed, 0 insertions, 0 deletions