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author | Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com> | 2009-01-05 22:38:14 -0500 |
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committer | Theodore Ts'o <tytso@mit.edu> | 2009-01-05 22:38:14 -0500 |
commit | 6b082b531228c43d454c082fc0f969da1695b060 (patch) | |
tree | dbd2f64945064e31383a24729fcdb672a23f65e9 /fs/ext4 | |
parent | 87d8fe1ee6b8d2f95076142d58c440dba4e7bdc2 (diff) |
ext3: provide function to release metadata pages under memory pressure
Pages in the page cache belonging to ext3 data files are released via
the ext3_releasepage() function specified in the ext3 inode's
address_space_ops. However, metadata blocks (such as indirect blocks,
directory blocks, etc) are managed via the block device
address_space_ops, and they can not be released by
try_to_free_buffers() if they have a journal head attached to them.
To address this, we supply a try_to_free_pages() function which calls
journal_try_to_free_buffers() function to free the metadata, and which
is called by the block device's blkdev_releasepage() function.
Signed-off-by: Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: linux-fsdevel@vger.kernel.org
Diffstat (limited to 'fs/ext4')
0 files changed, 0 insertions, 0 deletions