#include <linux/slab.h>
#include <linux/highmem.h>
#include <linux/bitops.h>
-#include <linux/debugfs.h>
#define MLOG_MASK_PREFIX ML_DISK_ALLOC
#include <cluster/masklog.h>
#include "ocfs2.h"
#include "alloc.h"
+#include "blockcheck.h"
#include "dlmglue.h"
#include "inode.h"
#include "journal.h"
static int ocfs2_local_alloc_find_clear_bits(struct ocfs2_super *osb,
struct ocfs2_dinode *alloc,
- u32 numbits);
+ u32 *numbits,
+ struct ocfs2_alloc_reservation *resv);
static void ocfs2_clear_local_alloc(struct ocfs2_dinode *alloc);
static int ocfs2_local_alloc_slide_window(struct ocfs2_super *osb,
struct inode *local_alloc_inode);
-#ifdef CONFIG_OCFS2_FS_STATS
-
-DEFINE_MUTEX(la_debug_mutex);
-
-static int ocfs2_la_debug_open(struct inode *inode, struct file *file)
+/*
+ * ocfs2_la_default_mb() - determine a default size, in megabytes of
+ * the local alloc.
+ *
+ * Generally, we'd like to pick as large a local alloc as
+ * possible. Performance on large workloads tends to scale
+ * proportionally to la size. In addition to that, the reservations
+ * code functions more efficiently as it can reserve more windows for
+ * write.
+ *
+ * Some things work against us when trying to choose a large local alloc:
+ *
+ * - We need to ensure our sizing is picked to leave enough space in
+ * group descriptors for other allocations (such as block groups,
+ * etc). Picking default sizes which are a multiple of 4 could help
+ * - block groups are allocated in 2mb and 4mb chunks.
+ *
+ * - Likewise, we don't want to starve other nodes of bits on small
+ * file systems. This can easily be taken care of by limiting our
+ * default to a reasonable size (256M) on larger cluster sizes.
+ *
+ * - Some file systems can't support very large sizes - 4k and 8k in
+ * particular are limited to less than 128 and 256 megabytes respectively.
+ *
+ * The following reference table shows group descriptor and local
+ * alloc maximums at various cluster sizes (4k blocksize)
+ *
+ * csize: 4K group: 126M la: 121M
+ * csize: 8K group: 252M la: 243M
+ * csize: 16K group: 504M la: 486M
+ * csize: 32K group: 1008M la: 972M
+ * csize: 64K group: 2016M la: 1944M
+ * csize: 128K group: 4032M la: 3888M
+ * csize: 256K group: 8064M la: 7776M
+ * csize: 512K group: 16128M la: 15552M
+ * csize: 1024K group: 32256M la: 31104M
+ */
+#define OCFS2_LA_MAX_DEFAULT_MB 256
+#define OCFS2_LA_OLD_DEFAULT 8
+unsigned int ocfs2_la_default_mb(struct ocfs2_super *osb)
{
- file->private_data = inode->i_private;
- return 0;
-}
+ unsigned int la_mb;
+ unsigned int gd_mb;
+ unsigned int megs_per_slot;
+ struct super_block *sb = osb->sb;
-#define LA_DEBUG_BUF_SZ PAGE_CACHE_SIZE
-#define LA_DEBUG_VER 1
-static ssize_t ocfs2_la_debug_read(struct file *file, char __user *userbuf,
- size_t count, loff_t *ppos)
-{
- struct ocfs2_super *osb = file->private_data;
- int written, ret;
- char *buf = osb->local_alloc_debug_buf;
+ gd_mb = ocfs2_clusters_to_megabytes(osb->sb,
+ 8 * ocfs2_group_bitmap_size(sb, 0, osb->s_feature_incompat));
- mutex_lock(&la_debug_mutex);
- memset(buf, 0, LA_DEBUG_BUF_SZ);
+ /*
+ * This takes care of files systems with very small group
+ * descriptors - 512 byte blocksize at cluster sizes lower
+ * than 16K and also 1k blocksize with 4k cluster size.
+ */
+ if ((sb->s_blocksize == 512 && osb->s_clustersize <= 8192)
+ || (sb->s_blocksize == 1024 && osb->s_clustersize == 4096))
+ return OCFS2_LA_OLD_DEFAULT;
- written = snprintf(buf, LA_DEBUG_BUF_SZ,
- "0x%x\t0x%llx\t%u\t%u\t0x%x\n",
- LA_DEBUG_VER,
- (unsigned long long)osb->la_last_gd,
- osb->local_alloc_default_bits,
- osb->local_alloc_bits, osb->local_alloc_state);
+ /*
+ * Leave enough room for some block groups and make the final
+ * value we work from a multiple of 4.
+ */
+ gd_mb -= 16;
+ gd_mb &= 0xFFFFFFFB;
- ret = simple_read_from_buffer(userbuf, count, ppos, buf, written);
+ la_mb = gd_mb;
- mutex_unlock(&la_debug_mutex);
- return ret;
-}
+ /*
+ * Keep window sizes down to a reasonable default
+ */
+ if (la_mb > OCFS2_LA_MAX_DEFAULT_MB) {
+ /*
+ * Some clustersize / blocksize combinations will have
+ * given us a larger than OCFS2_LA_MAX_DEFAULT_MB
+ * default size, but get poor distribution when
+ * limited to exactly 256 megabytes.
+ *
+ * As an example, 16K clustersize at 4K blocksize
+ * gives us a cluster group size of 504M. Paring the
+ * local alloc size down to 256 however, would give us
+ * only one window and around 200MB left in the
+ * cluster group. Instead, find the first size below
+ * 256 which would give us an even distribution.
+ *
+ * Larger cluster group sizes actually work out pretty
+ * well when pared to 256, so we don't have to do this
+ * for any group that fits more than two
+ * OCFS2_LA_MAX_DEFAULT_MB windows.
+ */
+ if (gd_mb > (2 * OCFS2_LA_MAX_DEFAULT_MB))
+ la_mb = 256;
+ else {
+ unsigned int gd_mult = gd_mb;
-static const struct file_operations ocfs2_la_debug_fops = {
- .open = ocfs2_la_debug_open,
- .read = ocfs2_la_debug_read,
-};
+ while (gd_mult > 256)
+ gd_mult = gd_mult >> 1;
-static void ocfs2_init_la_debug(struct ocfs2_super *osb)
-{
- osb->local_alloc_debug_buf = kmalloc(LA_DEBUG_BUF_SZ, GFP_NOFS);
- if (!osb->local_alloc_debug_buf)
- return;
-
- osb->local_alloc_debug = debugfs_create_file("local_alloc_stats",
- S_IFREG|S_IRUSR,
- osb->osb_debug_root,
- osb,
- &ocfs2_la_debug_fops);
- if (!osb->local_alloc_debug) {
- kfree(osb->local_alloc_debug_buf);
- osb->local_alloc_debug_buf = NULL;
+ la_mb = gd_mult;
+ }
}
-}
-
-static void ocfs2_shutdown_la_debug(struct ocfs2_super *osb)
-{
- if (osb->local_alloc_debug)
- debugfs_remove(osb->local_alloc_debug);
- if (osb->local_alloc_debug_buf)
- kfree(osb->local_alloc_debug_buf);
+ megs_per_slot = osb->osb_clusters_at_boot / osb->max_slots;
+ megs_per_slot = ocfs2_clusters_to_megabytes(osb->sb, megs_per_slot);
+ /* Too many nodes, too few disk clusters. */
+ if (megs_per_slot < la_mb)
+ la_mb = megs_per_slot;
- osb->local_alloc_debug_buf = NULL;
- osb->local_alloc_debug = NULL;
+ return la_mb;
}
-#else /* CONFIG_OCFS2_FS_STATS */
-static void ocfs2_init_la_debug(struct ocfs2_super *osb)
-{
- return;
-}
-static void ocfs2_shutdown_la_debug(struct ocfs2_super *osb)
+
+void ocfs2_la_set_sizes(struct ocfs2_super *osb, int requested_mb)
{
- return;
+ struct super_block *sb = osb->sb;
+ unsigned int la_default_mb = ocfs2_la_default_mb(osb);
+ unsigned int la_max_mb;
+
+ la_max_mb = ocfs2_clusters_to_megabytes(sb,
+ ocfs2_local_alloc_size(sb) * 8);
+
+ mlog(0, "requested: %dM, max: %uM, default: %uM\n",
+ requested_mb, la_max_mb, la_default_mb);
+
+ if (requested_mb == -1) {
+ /* No user request - use defaults */
+ osb->local_alloc_default_bits =
+ ocfs2_megabytes_to_clusters(sb, la_default_mb);
+ } else if (requested_mb > la_max_mb) {
+ /* Request is too big, we give the maximum available */
+ osb->local_alloc_default_bits =
+ ocfs2_megabytes_to_clusters(sb, la_max_mb);
+ } else {
+ osb->local_alloc_default_bits =
+ ocfs2_megabytes_to_clusters(sb, requested_mb);
+ }
+
+ osb->local_alloc_bits = osb->local_alloc_default_bits;
}
-#endif
static inline int ocfs2_la_state_enabled(struct ocfs2_super *osb)
{
mlog_entry_void();
- ocfs2_init_la_debug(osb);
-
if (osb->local_alloc_bits == 0)
goto bail;
osb->local_alloc_bits, (osb->bitmap_cpg - 1));
osb->local_alloc_bits =
ocfs2_megabytes_to_clusters(osb->sb,
- OCFS2_DEFAULT_LOCAL_ALLOC_SIZE);
+ ocfs2_la_default_mb(osb));
}
/* read the alloc off disk */
goto bail;
}
- status = ocfs2_read_block(osb, OCFS2_I(inode)->ip_blkno,
- &alloc_bh, 0, inode);
+ status = ocfs2_read_inode_block_full(inode, &alloc_bh,
+ OCFS2_BH_IGNORE_CACHE);
if (status < 0) {
mlog_errno(status);
goto bail;
bail:
if (status < 0)
- if (alloc_bh)
- brelse(alloc_bh);
+ brelse(alloc_bh);
if (inode)
iput(inode);
- if (status < 0)
- ocfs2_shutdown_la_debug(osb);
-
mlog(0, "Local alloc window bits = %d\n", osb->local_alloc_bits);
mlog_exit(status);
cancel_delayed_work(&osb->la_enable_wq);
flush_workqueue(ocfs2_wq);
- ocfs2_shutdown_la_debug(osb);
-
if (osb->local_alloc_state == OCFS2_LA_UNUSED)
goto out;
osb->local_alloc_state = OCFS2_LA_DISABLED;
+ ocfs2_resmap_uninit(&osb->osb_la_resmap);
+
main_bm_inode = ocfs2_get_system_file_inode(osb,
GLOBAL_BITMAP_SYSTEM_INODE,
OCFS2_INVALID_SLOT);
}
memcpy(alloc_copy, alloc, bh->b_size);
- status = ocfs2_journal_access(handle, local_alloc_inode, bh,
- OCFS2_JOURNAL_ACCESS_WRITE);
+ status = ocfs2_journal_access_di(handle, INODE_CACHE(local_alloc_inode),
+ bh, OCFS2_JOURNAL_ACCESS_WRITE);
if (status < 0) {
mlog_errno(status);
goto out_commit;
}
ocfs2_clear_local_alloc(alloc);
-
- status = ocfs2_journal_dirty(handle, bh);
- if (status < 0) {
- mlog_errno(status);
- goto out_commit;
- }
+ ocfs2_journal_dirty(handle, bh);
brelse(bh);
osb->local_alloc_bh = NULL;
ocfs2_commit_trans(osb, handle);
out_unlock:
- if (main_bm_bh)
- brelse(main_bm_bh);
+ brelse(main_bm_bh);
ocfs2_inode_unlock(main_bm_inode, 1);
mutex_lock(&inode->i_mutex);
- status = ocfs2_read_block(osb, OCFS2_I(inode)->ip_blkno,
- &alloc_bh, 0, inode);
+ status = ocfs2_read_inode_block_full(inode, &alloc_bh,
+ OCFS2_BH_IGNORE_CACHE);
if (status < 0) {
mlog_errno(status);
goto bail;
alloc = (struct ocfs2_dinode *) alloc_bh->b_data;
ocfs2_clear_local_alloc(alloc);
- status = ocfs2_write_block(osb, alloc_bh, inode);
+ ocfs2_compute_meta_ecc(osb->sb, alloc_bh->b_data, &alloc->i_check);
+ status = ocfs2_write_block(osb, alloc_bh, INODE_CACHE(inode));
if (status < 0)
mlog_errno(status);
*alloc_copy = NULL;
}
- if (alloc_bh)
- brelse(alloc_bh);
+ brelse(alloc_bh);
if (inode) {
mutex_unlock(&inode->i_mutex);
out_mutex:
mutex_unlock(&main_bm_inode->i_mutex);
- if (main_bm_bh)
- brelse(main_bm_bh);
+ brelse(main_bm_bh);
iput(main_bm_inode);
out:
if (!status)
- ocfs2_init_inode_steal_slot(osb);
+ ocfs2_init_steal_slots(osb);
mlog_exit(status);
return status;
}
goto bail;
}
+ if (ac->ac_max_block)
+ mlog(0, "Calling in_range for max block %llu\n",
+ (unsigned long long)ac->ac_max_block);
+
ac->ac_inode = local_alloc_inode;
/* We should never use localalloc from another slot */
ac->ac_alloc_slot = osb->slot_num;
alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data;
la = OCFS2_LOCAL_ALLOC(alloc);
- start = ocfs2_local_alloc_find_clear_bits(osb, alloc, bits_wanted);
+ start = ocfs2_local_alloc_find_clear_bits(osb, alloc, &bits_wanted,
+ ac->ac_resv);
if (start == -1) {
/* TODO: Shouldn't we just BUG here? */
status = -ENOSPC;
bitmap = la->la_bitmap;
*bit_off = le32_to_cpu(la->la_bm_off) + start;
- /* local alloc is always contiguous by nature -- we never
- * delete bits from it! */
*num_bits = bits_wanted;
- status = ocfs2_journal_access(handle, local_alloc_inode,
- osb->local_alloc_bh,
- OCFS2_JOURNAL_ACCESS_WRITE);
+ status = ocfs2_journal_access_di(handle,
+ INODE_CACHE(local_alloc_inode),
+ osb->local_alloc_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
if (status < 0) {
mlog_errno(status);
goto bail;
}
+ ocfs2_resmap_claimed_bits(&osb->osb_la_resmap, ac->ac_resv, start,
+ bits_wanted);
+
while(bits_wanted--)
ocfs2_set_bit(start++, bitmap);
le32_add_cpu(&alloc->id1.bitmap1.i_used, *num_bits);
+ ocfs2_journal_dirty(handle, osb->local_alloc_bh);
- status = ocfs2_journal_dirty(handle, osb->local_alloc_bh);
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
-
- status = 0;
bail:
mlog_exit(status);
return status;
}
static int ocfs2_local_alloc_find_clear_bits(struct ocfs2_super *osb,
- struct ocfs2_dinode *alloc,
- u32 numbits)
+ struct ocfs2_dinode *alloc,
+ u32 *numbits,
+ struct ocfs2_alloc_reservation *resv)
{
int numfound, bitoff, left, startoff, lastzero;
+ int local_resv = 0;
+ struct ocfs2_alloc_reservation r;
void *bitmap = NULL;
+ struct ocfs2_reservation_map *resmap = &osb->osb_la_resmap;
- mlog_entry("(numbits wanted = %u)\n", numbits);
+ mlog_entry("(numbits wanted = %u)\n", *numbits);
if (!alloc->id1.bitmap1.i_total) {
mlog(0, "No bits in my window!\n");
goto bail;
}
+ if (!resv) {
+ local_resv = 1;
+ ocfs2_resv_init_once(&r);
+ ocfs2_resv_set_type(&r, OCFS2_RESV_FLAG_TMP);
+ resv = &r;
+ }
+
+ numfound = *numbits;
+ if (ocfs2_resmap_resv_bits(resmap, resv, &bitoff, &numfound) == 0) {
+ if (numfound < *numbits)
+ *numbits = numfound;
+ goto bail;
+ }
+
+ /*
+ * Code error. While reservations are enabled, local
+ * allocation should _always_ go through them.
+ */
+ BUG_ON(osb->osb_resv_level != 0);
+
+ /*
+ * Reservations are disabled. Handle this the old way.
+ */
+
bitmap = OCFS2_LOCAL_ALLOC(alloc)->la_bitmap;
numfound = bitoff = startoff = 0;
startoff = bitoff+1;
}
/* we got everything we needed */
- if (numfound == numbits) {
+ if (numfound == *numbits) {
/* mlog(0, "Found it all!\n"); */
break;
}
mlog(0, "Exiting loop, bitoff = %d, numfound = %d\n", bitoff,
numfound);
- if (numfound == numbits)
+ if (numfound == *numbits)
bitoff = startoff - numfound;
else
bitoff = -1;
bail:
+ if (local_resv)
+ ocfs2_resv_discard(resmap, resv);
+
mlog_exit(bitoff);
return bitoff;
}
(unsigned long long)la_start_blk,
(unsigned long long)blkno);
- status = ocfs2_free_clusters(handle, main_bm_inode,
- main_bm_bh, blkno, count);
+ status = ocfs2_release_clusters(handle,
+ main_bm_inode,
+ main_bm_bh, blkno,
+ count);
if (status < 0) {
mlog_errno(status);
goto bail;
}
retry_enospc:
- (*ac)->ac_bits_wanted = osb->local_alloc_bits;
-
+ (*ac)->ac_bits_wanted = osb->local_alloc_default_bits;
status = ocfs2_reserve_cluster_bitmap_bits(osb, *ac);
if (status == -ENOSPC) {
if (ocfs2_recalc_la_window(osb, OCFS2_LA_EVENT_ENOSPC) ==
/* we used the generic suballoc reserve function, but we set
* everything up nicely, so there's no reason why we can't use
* the more specific cluster api to claim bits. */
- status = ocfs2_claim_clusters(osb, handle, ac, osb->local_alloc_bits,
+ status = ocfs2_claim_clusters(handle, ac, osb->local_alloc_bits,
&cluster_off, &cluster_count);
if (status == -ENOSPC) {
retry_enospc:
OCFS2_LA_DISABLED)
goto bail;
- status = ocfs2_claim_clusters(osb, handle, ac,
+ ac->ac_bits_wanted = osb->local_alloc_default_bits;
+ status = ocfs2_claim_clusters(handle, ac,
osb->local_alloc_bits,
&cluster_off,
&cluster_count);
memset(OCFS2_LOCAL_ALLOC(alloc)->la_bitmap, 0,
le16_to_cpu(la->la_size));
+ ocfs2_resmap_restart(&osb->osb_la_resmap, cluster_count,
+ OCFS2_LOCAL_ALLOC(alloc)->la_bitmap);
+
mlog(0, "New window allocated:\n");
mlog(0, "window la_bm_off = %u\n",
OCFS2_LOCAL_ALLOC(alloc)->la_bm_off);
}
memcpy(alloc_copy, alloc, osb->local_alloc_bh->b_size);
- status = ocfs2_journal_access(handle, local_alloc_inode,
- osb->local_alloc_bh,
- OCFS2_JOURNAL_ACCESS_WRITE);
+ status = ocfs2_journal_access_di(handle,
+ INODE_CACHE(local_alloc_inode),
+ osb->local_alloc_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
if (status < 0) {
mlog_errno(status);
goto bail;
}
ocfs2_clear_local_alloc(alloc);
-
- status = ocfs2_journal_dirty(handle, osb->local_alloc_bh);
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
+ ocfs2_journal_dirty(handle, osb->local_alloc_bh);
status = ocfs2_sync_local_to_main(osb, handle, alloc_copy,
main_bm_inode, main_bm_bh);
atomic_inc(&osb->alloc_stats.moves);
- status = 0;
bail:
if (handle)
ocfs2_commit_trans(osb, handle);
- if (main_bm_bh)
- brelse(main_bm_bh);
+ brelse(main_bm_bh);
if (main_bm_inode)
iput(main_bm_inode);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff