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Diffstat (limited to 'fs/ocfs2/localalloc.c')
-rw-r--r--fs/ocfs2/localalloc.c42
1 files changed, 30 insertions, 12 deletions
diff --git a/fs/ocfs2/localalloc.c b/fs/ocfs2/localalloc.c
index 0de0792fce7..add1ffdc5c6 100644
--- a/fs/ocfs2/localalloc.c
+++ b/fs/ocfs2/localalloc.c
@@ -75,18 +75,12 @@ static int ocfs2_local_alloc_new_window(struct ocfs2_super *osb,
static int ocfs2_local_alloc_slide_window(struct ocfs2_super *osb,
struct inode *local_alloc_inode);
-/*
- * Determine how large our local alloc window should be, in bits.
- *
- * These values (and the behavior in ocfs2_alloc_should_use_local) have
- * been chosen so that most allocations, including new block groups go
- * through local alloc.
- */
static inline int ocfs2_local_alloc_window_bits(struct ocfs2_super *osb)
{
- BUG_ON(osb->s_clustersize_bits < 12);
+ BUG_ON(osb->s_clustersize_bits > 20);
- return 2048 >> (osb->s_clustersize_bits - 12);
+ /* Size local alloc windows by the megabyte */
+ return osb->local_alloc_size << (20 - osb->s_clustersize_bits);
}
/*
@@ -96,18 +90,23 @@ static inline int ocfs2_local_alloc_window_bits(struct ocfs2_super *osb)
int ocfs2_alloc_should_use_local(struct ocfs2_super *osb, u64 bits)
{
int la_bits = ocfs2_local_alloc_window_bits(osb);
+ int ret = 0;
if (osb->local_alloc_state != OCFS2_LA_ENABLED)
- return 0;
+ goto bail;
/* la_bits should be at least twice the size (in clusters) of
* a new block group. We want to be sure block group
* allocations go through the local alloc, so allow an
* allocation to take up to half the bitmap. */
if (bits > (la_bits / 2))
- return 0;
+ goto bail;
- return 1;
+ ret = 1;
+bail:
+ mlog(0, "state=%d, bits=%llu, la_bits=%d, ret=%d\n",
+ osb->local_alloc_state, (unsigned long long)bits, la_bits, ret);
+ return ret;
}
int ocfs2_load_local_alloc(struct ocfs2_super *osb)
@@ -121,6 +120,19 @@ int ocfs2_load_local_alloc(struct ocfs2_super *osb)
mlog_entry_void();
+ if (ocfs2_mount_local(osb))
+ goto bail;
+
+ if (osb->local_alloc_size == 0)
+ goto bail;
+
+ if (ocfs2_local_alloc_window_bits(osb) >= osb->bitmap_cpg) {
+ mlog(ML_NOTICE, "Requested local alloc window %d is larger "
+ "than max possible %u. Using defaults.\n",
+ ocfs2_local_alloc_window_bits(osb), (osb->bitmap_cpg - 1));
+ osb->local_alloc_size = OCFS2_DEFAULT_LOCAL_ALLOC_SIZE;
+ }
+
/* read the alloc off disk */
inode = ocfs2_get_system_file_inode(osb, LOCAL_ALLOC_SYSTEM_INODE,
osb->slot_num);
@@ -181,6 +193,9 @@ bail:
if (inode)
iput(inode);
+ mlog(0, "Local alloc window bits = %d\n",
+ ocfs2_local_alloc_window_bits(osb));
+
mlog_exit(status);
return status;
}
@@ -521,6 +536,9 @@ bail:
iput(local_alloc_inode);
}
+ mlog(0, "bits=%d, slot=%d, ret=%d\n", bits_wanted, osb->slot_num,
+ status);
+
mlog_exit(status);
return status;
}