nilfs2: flush palloc cache before manipulating data pages of GC dat (c3ea56c8) · Commits · 戴 / test

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>

fs/nilfs2/gcdat.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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);
		}

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