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| author | Mark Fasheh <mark.fasheh@oracle.com> | 2006-12-11 11:06:36 -0800 |
|---|---|---|
| committer | Mark Fasheh <mark.fasheh@oracle.com> | 2006-12-28 16:38:59 -0800 |
| commit | 7f4a2a97e324e8c826d1d983bc8efb5c59194f02 (patch) | |
| tree | 649129bc73b4de1dee662250892acf883cf45ba2 /fs/ocfs2 | |
| parent | 6c2aad0567e693f9588d0a0683f96ed872fb4641 (diff) | |
| download | lwn-7f4a2a97e324e8c826d1d983bc8efb5c59194f02.tar.gz lwn-7f4a2a97e324e8c826d1d983bc8efb5c59194f02.zip | |
ocfs2: always unmap in ocfs2_data_convert_worker()
Mmap-heavy clustered workloads were sometimes finding stale data on mmap
reads. The solution is to call unmap_mapping_range() on any down convert of
a data lock.
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Diffstat (limited to 'fs/ocfs2')
| -rw-r--r-- | fs/ocfs2/dlmglue.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c index e6220137bf69..e335541727f9 100644 --- a/fs/ocfs2/dlmglue.c +++ b/fs/ocfs2/dlmglue.c @@ -2718,6 +2718,15 @@ static int ocfs2_data_convert_worker(struct ocfs2_lock_res *lockres, inode = ocfs2_lock_res_inode(lockres); mapping = inode->i_mapping; + /* + * We need this before the filemap_fdatawrite() so that it can + * transfer the dirty bit from the PTE to the + * page. Unfortunately this means that even for EX->PR + * downconverts, we'll lose our mappings and have to build + * them up again. + */ + unmap_mapping_range(mapping, 0, 0, 0); + if (filemap_fdatawrite(mapping)) { mlog(ML_ERROR, "Could not sync inode %llu for downconvert!", (unsigned long long)OCFS2_I(inode)->ip_blkno); @@ -2725,7 +2734,6 @@ static int ocfs2_data_convert_worker(struct ocfs2_lock_res *lockres, sync_mapping_buffers(mapping); if (blocking == LKM_EXMODE) { truncate_inode_pages(mapping, 0); - unmap_mapping_range(mapping, 0, 0, 0); } else { /* We only need to wait on the I/O if we're not also * truncating pages because truncate_inode_pages waits |