AcoSail/kernel_optimize_test
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Merge branch 'allocation-fixes' into integration

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This commit is contained in:
Chris Mason 2012-01-16 15:25:42 -05:00
commit 64e05503ab
4 changed files with 91 additions and 108 deletions
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72
fs/btrfs/extent-tree.c
View File

@ -2267,9 +2267,7 @@ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans,
BUG_ON(ret);
kfree(extent_op);
cond_resched();
spin_lock(&delayed_refs->lock);
continue;
goto next;
}
list_del_init(&locked_ref->cluster);
@ -2289,7 +2287,11 @@ static noinline int run_clustered_refs(struct btrfs_trans_handle *trans,
btrfs_put_delayed_ref(ref);
kfree(extent_op);
count++;
next:
do_chunk_alloc(trans, root->fs_info->extent_root,
2 * 1024 * 1024,
btrfs_get_alloc_profile(root, 0),
CHUNK_ALLOC_NO_FORCE);
cond_resched();
spin_lock(&delayed_refs->lock);
}
@ -2317,6 +2319,10 @@ int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
if (root == root->fs_info->extent_root)
root = root->fs_info->tree_root;
do_chunk_alloc(trans, root->fs_info->extent_root,
2 * 1024 * 1024, btrfs_get_alloc_profile(root, 0),
CHUNK_ALLOC_NO_FORCE);
delayed_refs = &trans->transaction->delayed_refs;
INIT_LIST_HEAD(&cluster);
again:
@ -3257,27 +3263,12 @@ static int should_alloc_chunk(struct btrfs_root *root,
if (num_bytes - num_allocated < thresh)
return 1;
}
/*
* we have two similar checks here, one based on percentage
* and once based on a hard number of 256MB. The idea
* is that if we have a good amount of free
* room, don't allocate a chunk. A good mount is
* less than 80% utilized of the chunks we have allocated,
* or more than 256MB free
*/
if (num_allocated + alloc_bytes + 256 * 1024 * 1024 < num_bytes)
return 0;
if (num_allocated + alloc_bytes < div_factor(num_bytes, 8))
return 0;
thresh = btrfs_super_total_bytes(root->fs_info->super_copy);
/* 256MB or 5% of the FS */
thresh = max_t(u64, 256 * 1024 * 1024, div_factor_fine(thresh, 5));
/* 256MB or 2% of the FS */
thresh = max_t(u64, 256 * 1024 * 1024, div_factor_fine(thresh, 2));
if (num_bytes > thresh && sinfo->bytes_used < div_factor(num_bytes, 3))
if (num_bytes > thresh && sinfo->bytes_used < div_factor(num_bytes, 8))
return 0;
return 1;
}
@ -5295,15 +5286,6 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans,
if (unlikely(block_group->ro))
goto loop;
spin_lock(&block_group->free_space_ctl->tree_lock);
if (cached &&
block_group->free_space_ctl->free_space <
num_bytes + empty_cluster + empty_size) {
spin_unlock(&block_group->free_space_ctl->tree_lock);
goto loop;
}
spin_unlock(&block_group->free_space_ctl->tree_lock);
/*
* Ok we want to try and use the cluster allocator, so
* lets look there
@ -5349,8 +5331,15 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans,
* plenty of times and not have found
* anything, so we are likely way too
* fragmented for the clustering stuff to find
* anything. */
if (loop >= LOOP_NO_EMPTY_SIZE) {
* anything.
*
* However, if the cluster is taken from the
* current block group, release the cluster
* first, so that we stand a better chance of
* succeeding in the unclustered
* allocation. */
if (loop >= LOOP_NO_EMPTY_SIZE &&
last_ptr->block_group != block_group) {
spin_unlock(&last_ptr->refill_lock);
goto unclustered_alloc;
}
@ -5361,6 +5350,11 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans,
*/
btrfs_return_cluster_to_free_space(NULL, last_ptr);
if (loop >= LOOP_NO_EMPTY_SIZE) {
spin_unlock(&last_ptr->refill_lock);
goto unclustered_alloc;
}
/* allocate a cluster in this block group */
ret = btrfs_find_space_cluster(trans, root,
block_group, last_ptr,
@ -5401,6 +5395,15 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans,
}
unclustered_alloc:
spin_lock(&block_group->free_space_ctl->tree_lock);
if (cached &&
block_group->free_space_ctl->free_space <
num_bytes + empty_cluster + empty_size) {
spin_unlock(&block_group->free_space_ctl->tree_lock);
goto loop;
}
spin_unlock(&block_group->free_space_ctl->tree_lock);
offset = btrfs_find_space_for_alloc(block_group, search_start,
num_bytes, empty_size);
/*
@ -5438,9 +5441,6 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans,
goto loop;
}
ins->objectid = search_start;
ins->offset = num_bytes;
if (offset < search_start)
btrfs_add_free_space(used_block_group, offset,
search_start - offset);

112
fs/btrfs/free-space-cache.c
View File

@ -2283,23 +2283,23 @@ u64 btrfs_alloc_from_cluster(struct btrfs_block_group_cache *block_group,
static int btrfs_bitmap_cluster(struct btrfs_block_group_cache *block_group,
struct btrfs_free_space *entry,
struct btrfs_free_cluster *cluster,
u64 offset, u64 bytes, u64 min_bytes)
u64 offset, u64 bytes,
u64 cont1_bytes, u64 min_bytes)
{
struct btrfs_free_space_ctl *ctl = block_group->free_space_ctl;
unsigned long next_zero;
unsigned long i;
unsigned long search_bits;
unsigned long total_bits;
unsigned long want_bits;
unsigned long min_bits;
unsigned long found_bits;
unsigned long start = 0;
unsigned long total_found = 0;
int ret;
bool found = false;
i = offset_to_bit(entry->offset, block_group->sectorsize,
max_t(u64, offset, entry->offset));
search_bits = bytes_to_bits(bytes, block_group->sectorsize);
total_bits = bytes_to_bits(min_bytes, block_group->sectorsize);
want_bits = bytes_to_bits(bytes, block_group->sectorsize);
min_bits = bytes_to_bits(min_bytes, block_group->sectorsize);
again:
found_bits = 0;
@ -2308,7 +2308,7 @@ static int btrfs_bitmap_cluster(struct btrfs_block_group_cache *block_group,
i = find_next_bit(entry->bitmap, BITS_PER_BITMAP, i + 1)) {
next_zero = find_next_zero_bit(entry->bitmap,
BITS_PER_BITMAP, i);
if (next_zero - i >= search_bits) {
if (next_zero - i >= min_bits) {
found_bits = next_zero - i;
break;
}
@ -2318,10 +2318,9 @@ static int btrfs_bitmap_cluster(struct btrfs_block_group_cache *block_group,
if (!found_bits)
return -ENOSPC;
if (!found) {
if (!total_found) {
start = i;
cluster->max_size = 0;
found = true;
}
total_found += found_bits;
@ -2329,13 +2328,8 @@ static int btrfs_bitmap_cluster(struct btrfs_block_group_cache *block_group,
if (cluster->max_size < found_bits * block_group->sectorsize)
cluster->max_size = found_bits * block_group->sectorsize;
if (total_found < total_bits) {
i = find_next_bit(entry->bitmap, BITS_PER_BITMAP, next_zero);
if (i - start > total_bits * 2) {
total_found = 0;
cluster->max_size = 0;
found = false;
}
if (total_found < want_bits || cluster->max_size < cont1_bytes) {
i = next_zero + 1;
goto again;
}
@ -2351,23 +2345,23 @@ static int btrfs_bitmap_cluster(struct btrfs_block_group_cache *block_group,
/*
* This searches the block group for just extents to fill the cluster with.
* Try to find a cluster with at least bytes total bytes, at least one
* extent of cont1_bytes, and other clusters of at least min_bytes.
*/
static noinline int
setup_cluster_no_bitmap(struct btrfs_block_group_cache *block_group,
struct btrfs_free_cluster *cluster,
struct list_head *bitmaps, u64 offset, u64 bytes,
u64 min_bytes)
u64 cont1_bytes, u64 min_bytes)
{
struct btrfs_free_space_ctl *ctl = block_group->free_space_ctl;
struct btrfs_free_space *first = NULL;
struct btrfs_free_space *entry = NULL;
struct btrfs_free_space *prev = NULL;
struct btrfs_free_space *last;
struct rb_node *node;
u64 window_start;
u64 window_free;
u64 max_extent;
u64 max_gap = 128 * 1024;
entry = tree_search_offset(ctl, offset, 0, 1);
if (!entry)
@ -2377,8 +2371,8 @@ setup_cluster_no_bitmap(struct btrfs_block_group_cache *block_group,
* We don't want bitmaps, so just move along until we find a normal
* extent entry.
*/
while (entry->bitmap) {
if (list_empty(&entry->list))
while (entry->bitmap || entry->bytes < min_bytes) {
if (entry->bitmap && list_empty(&entry->list))
list_add_tail(&entry->list, bitmaps);
node = rb_next(&entry->offset_index);
if (!node)
@ -2391,12 +2385,9 @@ setup_cluster_no_bitmap(struct btrfs_block_group_cache *block_group,
max_extent = entry->bytes;
first = entry;
last = entry;
prev = entry;
while (window_free <= min_bytes) {
node = rb_next(&entry->offset_index);
if (!node)
return -ENOSPC;
for (node = rb_next(&entry->offset_index); node;
node = rb_next(&entry->offset_index)) {
entry = rb_entry(node, struct btrfs_free_space, offset_index);
if (entry->bitmap) {
@ -2405,26 +2396,18 @@ setup_cluster_no_bitmap(struct btrfs_block_group_cache *block_group,
continue;
}
/*
* we haven't filled the empty size and the window is
* very large. reset and try again
*/
if (entry->offset - (prev->offset + prev->bytes) > max_gap ||
entry->offset - window_start > (min_bytes * 2)) {
first = entry;
window_start = entry->offset;
window_free = entry->bytes;
last = entry;
if (entry->bytes < min_bytes)
continue;
last = entry;
window_free += entry->bytes;
if (entry->bytes > max_extent)
max_extent = entry->bytes;
} else {
last = entry;
window_free += entry->bytes;
if (entry->bytes > max_extent)
max_extent = entry->bytes;
}
prev = entry;
}
if (window_free < bytes || max_extent < cont1_bytes)
return -ENOSPC;
cluster->window_start = first->offset;
node = &first->offset_index;
@ -2438,7 +2421,7 @@ setup_cluster_no_bitmap(struct btrfs_block_group_cache *block_group,
entry = rb_entry(node, struct btrfs_free_space, offset_index);
node = rb_next(&entry->offset_index);
if (entry->bitmap)
if (entry->bitmap || entry->bytes < min_bytes)
continue;
rb_erase(&entry->offset_index, &ctl->free_space_offset);
@ -2460,7 +2443,7 @@ static noinline int
setup_cluster_bitmap(struct btrfs_block_group_cache *block_group,
struct btrfs_free_cluster *cluster,
struct list_head *bitmaps, u64 offset, u64 bytes,
u64 min_bytes)
u64 cont1_bytes, u64 min_bytes)
{
struct btrfs_free_space_ctl *ctl = block_group->free_space_ctl;
struct btrfs_free_space *entry;
@ -2485,7 +2468,7 @@ setup_cluster_bitmap(struct btrfs_block_group_cache *block_group,
if (entry->bytes < min_bytes)
continue;
ret = btrfs_bitmap_cluster(block_group, entry, cluster, offset,
bytes, min_bytes);
bytes, cont1_bytes, min_bytes);
if (!ret)
return 0;
}
@ -2499,7 +2482,7 @@ setup_cluster_bitmap(struct btrfs_block_group_cache *block_group,
/*
* here we try to find a cluster of blocks in a block group. The goal
* is to find at least bytes free and up to empty_size + bytes free.
* is to find at least bytes+empty_size.
* We might not find them all in one contiguous area.
*
* returns zero and sets up cluster if things worked out, otherwise
@ -2515,23 +2498,24 @@ int btrfs_find_space_cluster(struct btrfs_trans_handle *trans,
struct btrfs_free_space *entry, *tmp;
LIST_HEAD(bitmaps);
u64 min_bytes;
u64 cont1_bytes;
int ret;
/* for metadata, allow allocates with more holes */
/*
* Choose the minimum extent size we'll require for this
* cluster. For SSD_SPREAD, don't allow any fragmentation.
* For metadata, allow allocates with smaller extents. For
* data, keep it dense.
*/
if (btrfs_test_opt(root, SSD_SPREAD)) {
min_bytes = bytes + empty_size;
cont1_bytes = min_bytes = bytes + empty_size;
} else if (block_group->flags & BTRFS_BLOCK_GROUP_METADATA) {
/*
* we want to do larger allocations when we are
* flushing out the delayed refs, it helps prevent
* making more work as we go along.
*/
if (trans->transaction->delayed_refs.flushing)
min_bytes = max(bytes, (bytes + empty_size) >> 1);
else
min_bytes = max(bytes, (bytes + empty_size) >> 4);
} else
min_bytes = max(bytes, (bytes + empty_size) >> 2);
cont1_bytes = bytes;
min_bytes = block_group->sectorsize;
} else {
cont1_bytes = max(bytes, (bytes + empty_size) >> 2);
min_bytes = block_group->sectorsize;
}
spin_lock(&ctl->tree_lock);
@ -2539,7 +2523,7 @@ int btrfs_find_space_cluster(struct btrfs_trans_handle *trans,
* If we know we don't have enough space to make a cluster don't even
* bother doing all the work to try and find one.
*/
if (ctl->free_space < min_bytes) {
if (ctl->free_space < bytes) {
spin_unlock(&ctl->tree_lock);
return -ENOSPC;
}
@ -2553,10 +2537,12 @@ int btrfs_find_space_cluster(struct btrfs_trans_handle *trans,
}
ret = setup_cluster_no_bitmap(block_group, cluster, &bitmaps, offset,
bytes, min_bytes);
bytes + empty_size,
cont1_bytes, min_bytes);
if (ret)
ret = setup_cluster_bitmap(block_group, cluster, &bitmaps,
offset, bytes, min_bytes);
offset, bytes + empty_size,
cont1_bytes, min_bytes);
/* Clear our temporary list */
list_for_each_entry_safe(entry, tmp, &bitmaps, list)

9
fs/btrfs/transaction.c
View File

@ -467,19 +467,12 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
btrfs_trans_release_metadata(trans, root);
trans->block_rsv = NULL;
while (count < 4) {
while (count < 2) {
unsigned long cur = trans->delayed_ref_updates;
trans->delayed_ref_updates = 0;
if (cur &&
trans->transaction->delayed_refs.num_heads_ready > 64) {
trans->delayed_ref_updates = 0;
/*
* do a full flush if the transaction is trying
* to close
*/
if (trans->transaction->delayed_refs.flushing)
cur = 0;
btrfs_run_delayed_refs(trans, root, cur);
} else {
break;

6
fs/btrfs/volumes.c
View File

@ -2441,7 +2441,11 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
max_stripe_size = 1024 * 1024 * 1024;
max_chunk_size = 10 * max_stripe_size;
} else if (type & BTRFS_BLOCK_GROUP_METADATA) {
max_stripe_size = 256 * 1024 * 1024;
/* for larger filesystems, use larger metadata chunks */
if (fs_devices->total_rw_bytes > 50ULL * 1024 * 1024 * 1024)
max_stripe_size = 1024 * 1024 * 1024;
else
max_stripe_size = 256 * 1024 * 1024;
max_chunk_size = max_stripe_size;
} else if (type & BTRFS_BLOCK_GROUP_SYSTEM) {
max_stripe_size = 8 * 1024 * 1024;