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nilfs2: flush palloc cache before manipulating data pages of GC dat

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Data pages in gcdat metadata file (i.e. the secondary DAT for GC), are
cleared or even moved back to the normal DAT when a shot of garbage
collection was done.

Buffer heads held by the palloc cache of gcdat must be cleared before
these page cache manipulation.  This adds nilfs_palloc_clear_cache()
to ensure this.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
This commit is contained in:
Ryusuke Konishi 2009-11-15 20:13:21 +09:00
parent 8908b2f70b
commit c3ea56c800
1 changed files with 3 additions and 0 deletions
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3
fs/nilfs2/gcdat.c
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@ -61,6 +61,8 @@ void nilfs_commit_gcdat_inode(struct the_nilfs *nilfs)
nilfs_bmap_commit_gcdat(gii->i_bmap, dii->i_bmap);
nilfs_palloc_clear_cache(dat);
nilfs_palloc_clear_cache(gcdat);
nilfs_clear_dirty_pages(mapping);
nilfs_copy_back_pages(mapping, gmapping);
/* note: mdt dirty flags should be cleared by segctor. */
@ -79,6 +81,7 @@ void nilfs_clear_gcdat_inode(struct the_nilfs *nilfs)
gcdat->i_state = I_CLEAR;
gii->i_flags = 0;
nilfs_palloc_clear_cache(gcdat);
truncate_inode_pages(gcdat->i_mapping, 0);
truncate_inode_pages(&gii->i_btnode_cache, 0);
}