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Diffstat (limited to 'fs/gfs2/glock.c')
-rw-r--r--fs/gfs2/glock.c39
1 files changed, 30 insertions, 9 deletions
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index dab2526071cc..1ed81f40da0d 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -46,10 +46,11 @@
#include "trace_gfs2.h"
struct gfs2_glock_iter {
- int hash; /* hash bucket index */
- struct gfs2_sbd *sdp; /* incore superblock */
- struct gfs2_glock *gl; /* current glock struct */
- char string[512]; /* scratch space */
+ int hash; /* hash bucket index */
+ unsigned nhash; /* Index within current bucket */
+ struct gfs2_sbd *sdp; /* incore superblock */
+ struct gfs2_glock *gl; /* current glock struct */
+ loff_t last_pos; /* last position */
};
typedef void (*glock_examiner) (struct gfs2_glock * gl);
@@ -767,6 +768,7 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
gl->gl_stats.stats[GFS2_LKS_DCOUNT] = 0;
gl->gl_stats.stats[GFS2_LKS_QCOUNT] = 0;
memset(&gl->gl_lksb, 0, sizeof(struct dlm_lksb));
+ memset(gl->gl_lvb, 0, 32 * sizeof(char));
gl->gl_lksb.sb_lvbptr = gl->gl_lvb;
gl->gl_tchange = jiffies;
gl->gl_object = NULL;
@@ -948,9 +950,7 @@ void gfs2_print_dbg(struct seq_file *seq, const char *fmt, ...)
va_start(args, fmt);
if (seq) {
- struct gfs2_glock_iter *gi = seq->private;
- vsprintf(gi->string, fmt, args);
- seq_printf(seq, gi->string);
+ seq_vprintf(seq, fmt, args);
} else {
vaf.fmt = fmt;
vaf.va = &args;
@@ -1854,8 +1854,14 @@ static int gfs2_glock_iter_next(struct gfs2_glock_iter *gi)
gl = gi->gl;
if (gl) {
gi->gl = glock_hash_next(gl);
+ gi->nhash++;
} else {
+ if (gi->hash >= GFS2_GL_HASH_SIZE) {
+ rcu_read_unlock();
+ return 1;
+ }
gi->gl = glock_hash_chain(gi->hash);
+ gi->nhash = 0;
}
while (gi->gl == NULL) {
gi->hash++;
@@ -1864,6 +1870,7 @@ static int gfs2_glock_iter_next(struct gfs2_glock_iter *gi)
return 1;
}
gi->gl = glock_hash_chain(gi->hash);
+ gi->nhash = 0;
}
/* Skip entries for other sb and dead entries */
} while (gi->sdp != gi->gl->gl_sbd || atomic_read(&gi->gl->gl_ref) == 0);
@@ -1876,7 +1883,12 @@ static void *gfs2_glock_seq_start(struct seq_file *seq, loff_t *pos)
struct gfs2_glock_iter *gi = seq->private;
loff_t n = *pos;
- gi->hash = 0;
+ if (gi->last_pos <= *pos)
+ n = gi->nhash + (*pos - gi->last_pos);
+ else
+ gi->hash = 0;
+
+ gi->nhash = 0;
rcu_read_lock();
do {
@@ -1884,6 +1896,7 @@ static void *gfs2_glock_seq_start(struct seq_file *seq, loff_t *pos)
return NULL;
} while (n--);
+ gi->last_pos = *pos;
return gi->gl;
}
@@ -1893,7 +1906,7 @@ static void *gfs2_glock_seq_next(struct seq_file *seq, void *iter_ptr,
struct gfs2_glock_iter *gi = seq->private;
(*pos)++;
-
+ gi->last_pos = *pos;
if (gfs2_glock_iter_next(gi))
return NULL;
@@ -1964,6 +1977,8 @@ static const struct seq_operations gfs2_sbstats_seq_ops = {
.show = gfs2_sbstats_seq_show,
};
+#define GFS2_SEQ_GOODSIZE min(PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER, 65536UL)
+
static int gfs2_glocks_open(struct inode *inode, struct file *file)
{
int ret = seq_open_private(file, &gfs2_glock_seq_ops,
@@ -1972,6 +1987,9 @@ static int gfs2_glocks_open(struct inode *inode, struct file *file)
struct seq_file *seq = file->private_data;
struct gfs2_glock_iter *gi = seq->private;
gi->sdp = inode->i_private;
+ seq->buf = kmalloc(GFS2_SEQ_GOODSIZE, GFP_KERNEL | __GFP_NOWARN);
+ if (seq->buf)
+ seq->size = GFS2_SEQ_GOODSIZE;
}
return ret;
}
@@ -1984,6 +2002,9 @@ static int gfs2_glstats_open(struct inode *inode, struct file *file)
struct seq_file *seq = file->private_data;
struct gfs2_glock_iter *gi = seq->private;
gi->sdp = inode->i_private;
+ seq->buf = kmalloc(GFS2_SEQ_GOODSIZE, GFP_KERNEL | __GFP_NOWARN);
+ if (seq->buf)
+ seq->size = GFS2_SEQ_GOODSIZE;
}
return ret;
}