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| author | Mingming Cao <cmm@us.ibm.com> | 2008-07-11 19:27:31 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2008-07-11 19:27:31 -0400 |
| commit | 61628a3f3a37af2bf25daf8e26fd6b76a78c4f76 (patch) | |
| tree | 25375b739b2e3f65c8dff3d3dd2a78e0724d0f96 /fs/ext4/xattr.c | |
| parent | 06d6cf6959d22037fcec598f4f954db5db3d7356 (diff) | |
| download | lwn-61628a3f3a37af2bf25daf8e26fd6b76a78c4f76.tar.gz lwn-61628a3f3a37af2bf25daf8e26fd6b76a78c4f76.zip | |
ext4: Invert lock ordering of page_lock and transaction start in delalloc
With the reverse locking, we need to start a transation before taking
the page lock, so in ext4_da_writepages() we need to break the write-out
into chunks, and restart the journal for each chunck to ensure the
write-out fits in a single transaction.
Updated patch from Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
which fixes delalloc sync hang with journal lock inversion, and address
the performance regression issue.
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/xattr.c')
0 files changed, 0 insertions, 0 deletions