GFS2: Be more aggressive in reclaiming unlinked inodes

This patch increases the frequency with which gfs2 looks
for unlinked, but still allocated inodes. Its the equivalent
operation to ext3's orphan list, but done with bitmaps in
the resource groups.

This also fixes a bug where a field in the rgrp was too small.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index dd87379b61e67f2803c61a7c680c5942b867e58e..225347fbff3c25ee72fdaa1e3d5106356bafde16 100644 (file)
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -94,7 +94,7 @@ struct gfs2_rgrpd {
        struct gfs2_sbd *rd_sbd;
        unsigned int rd_bh_count;
        u32 rd_last_alloc;
-       unsigned char rd_flags;
+       u32 rd_flags;
 #define GFS2_RDF_CHECK         0x10000000 /* check for unlinked inodes */
 #define GFS2_RDF_UPTODATE      0x20000000 /* rg is up to date */
 #define GFS2_RDF_ERROR         0x40000000 /* error in rg */

diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index 23637b9d1c739e0d89b4612dbe06842c252e1b18..ee3d5c1876a32fe89907a6199c0199c2d64d1b82 100644 (file)
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -581,7 +581,6 @@ static int read_rindex_entry(struct gfs2_inode *ip,
 
        rgd->rd_gl->gl_object = rgd;
        rgd->rd_flags &= ~GFS2_RDF_UPTODATE;
-       rgd->rd_flags |= GFS2_RDF_CHECK;
        return error;
 }
 
@@ -703,6 +702,8 @@ static void gfs2_rgrp_in(struct gfs2_rgrpd *rgd, const void *buf)
 
        rg_flags = be32_to_cpu(str->rg_flags);
        rg_flags &= ~GFS2_RDF_MASK;
+       rgd->rd_flags &= GFS2_RDF_MASK;
+       rgd->rd_flags |= rg_flags;
        rgd->rd_free = be32_to_cpu(str->rg_free);
        rgd->rd_dinodes = be32_to_cpu(str->rg_dinodes);
        rgd->rd_igeneration = be64_to_cpu(str->rg_igeneration);
@@ -773,7 +774,7 @@ int gfs2_rgrp_bh_get(struct gfs2_rgrpd *rgd)
                for (x = 0; x < length; x++)
                        clear_bit(GBF_FULL, &rgd->rd_bits[x].bi_flags);
                gfs2_rgrp_in(rgd, (rgd->rd_bits[0].bi_bh)->b_data);
-               rgd->rd_flags |= GFS2_RDF_UPTODATE;
+               rgd->rd_flags |= (GFS2_RDF_UPTODATE | GFS2_RDF_CHECK);
        }
 
        spin_lock(&sdp->sd_rindex_spin);