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| author | Dmitry Monakhov <dmonakhov@openvz.org> | 2014-12-02 22:09:50 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2014-12-02 22:09:50 +0100 |
| commit | 5cc28a9eaab21ce7ded7845b32e2eafc4bbeb175 (patch) | |
| tree | a2c58f9c69d275ab8a6794c89ccb64232d5634fb /fs/ext4 | |
| parent | ext4: forbid journal_async_commit in data=ordered mode (diff) | |
| download | linux-5cc28a9eaab21ce7ded7845b32e2eafc4bbeb175.tar.xz linux-5cc28a9eaab21ce7ded7845b32e2eafc4bbeb175.zip | |
ext4: prevent fsreentrance deadlock for inline_data
ext4_da_convert_inline_data_to_extent() invokes
grab_cache_page_write_begin(). grab_cache_page_write_begin performs
memory allocation, so fs-reentrance should be prohibited because we
are inside journal transaction.
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/inline.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c index 3ea62695abce..efdcede40c22 100644 --- a/fs/ext4/inline.c +++ b/fs/ext4/inline.c @@ -870,6 +870,12 @@ retry_journal: goto out_journal; } + /* + * We cannot recurse into the filesystem as the transaction + * is already started. + */ + flags |= AOP_FLAG_NOFS; + if (ret == -ENOSPC) { ret = ext4_da_convert_inline_data_to_extent(mapping, inode, @@ -882,11 +888,6 @@ retry_journal: goto out; } - /* - * We cannot recurse into the filesystem as the transaction - * is already started. - */ - flags |= AOP_FLAG_NOFS; page = grab_cache_page_write_begin(mapping, 0, flags); if (!page) { |