committed in r4045.

assertion failure that was accidentally introduced in r4036.
Instead of calling buf_block_get_frame(), which asserts that the
block must be buffer-fixed, access block->frame directly.  That
is safe, because changes of block->page.state are protected by
the buffer pool mutex, which we are holding.

This bug was reported by Michael.

read zip_size while still holding block_mutex.

Adjust the paths in innodb_file_per_table.diff with a recent rename of
the test/result files in the MySQL tree.

within UNIV_DEBUG. The two remaining callers in non-debug builds,
btr_search_guess_on_hash() and btr_search_validate(), were rewritten
to call buf_page_hash_get().

To implement support for a resizeable buffer pool, the function
buf_block_align() had been rewritten to perform a page hash lookup in
the buffer pool. The caller was also made responsible for holding the
buffer pool mutex.

Because the page hash lookup is expensive and it has to be done while
holding the buffer pool mutex, implement buf_block_align() by pointer
arithmetics again, and make btr_search_guess_on_hash() call it. Note
that this will have to be adjusted if the interface to the resizeable
buffer pool is actually implemented.

rb://83 approved by Heikki Tuuri, to address Issue #161.

As a deviation from the approved patch, this patch also makes
btr_search_validate() (invoked by CHECK TABLE) check that
buf_pool->page_hash is consistent with buf_block_align().

that was introduced in r4030.

  ------------------------------------------------------------------------
  r4032 | marko | 2009-01-23 15:43:51 +0200 (Fri, 23 Jan 2009) | 10 lines

  branches/5.1: Merge r4031 from branches/5.0:

  btr_search_drop_page_hash_when_freed(): Check if buf_page_get_gen()
  returns NULL.  The page may have been evicted from the buffer pool
  between buf_page_peek_if_search_hashed() and buf_page_get_gen(),
  because the buffer pool mutex will be released between these two calls.
  (Bug #42279, Issue #160)

  rb://82 approved by Heikki Tuuri
  ------------------------------------------------------------------------

This was noticed while investigating Issue #160.

This will help trim the dependencies of InnoDB Hot Backup.

recv_recovery_from_checkpoint_start(): Rename to
recv_recovery_from_checkpoint_start_func(), and remove the two first
parameters unless UNIV_LOG_ARCHIVE is defined.  Define and use
the auxiliary macros TYPE_CHECKPOINT and LIMIT_LSN in the function.

struct recv_sys_struct: Remove archive_group unless UNIV_LOG_ARCHIVE
is defined.

Do not define LOG_ARCHIVE unless UNIV_LOG_ARCHIVE is defined.

Add ChangeLog entries for the bugfixes in r4004 and r4005.

  ------------------------------------------------------------------------
  r4004 | marko | 2009-01-20 16:19:00 +0200 (Tue, 20 Jan 2009) | 12 lines

  branches/5.1: Merge r4003 from branches/5.0:

  rec_set_nth_field(): When the field already is SQL null,
  do nothing when it is being changed to SQL null. (Bug #41571)

  Normally, MySQL does not pass "do-nothing" updates to the storage engine.
  When it does and a column of an InnoDB table that is in ROW_FORMAT=COMPACT
  is being updated from NULL to NULL, the InnoDB buffer pool will be corrupted
  without this fix.

  rb://81 approved by Heikki Tuuri
  ------------------------------------------------------------------------
  r4005 | marko | 2009-01-20 16:22:36 +0200 (Tue, 20 Jan 2009) | 8 lines

  branches/5.1: lock_is_table_exclusive(): Acquire kernel_mutex before
  accessing table->locks and release kernel_mutex before returning from
  the function.  This fixes a portential race condition in the
  "commit every 10,000 rows" in ALTER TABLE, CREATE INDEX, DROP INDEX,
  and OPTIMIZE TABLE. (Bug #42152)

  rb://80 approved by Heikki Tuuri
  ------------------------------------------------------------------------

while accessing table->locks or un_member.tab_lock.locks.
This is related to Issue #158.  According to static analysis,
the added debug assertions should always hold.

lock_table_has_to_wait_in_queue(), lock_queue_iterator_reset(),
lock_queue_iterator_get_prev(), add_trx_relevant_locks_to_cache(),
fetch_data_into_cache(): Add ut_ad(mutex_own(&kernel_mutex)).

Add ChangeLog entries for the bug fixes in r3911 and r3930.

buf_LRU_block_free_non_file_page(): ut_ad(block) before dereferencing block.

buf_LRU_block_remove_hashed_page(): Forbid buf_pool_mutex_exit() while
calling buf_buddy_free().  Callers of buf_LRU_block_remove_hashed_page()
assume that the buffer pool mutex will not be released and reacquired.

Add comments and assertions that buf_LRU_block_remove_hashed_page()
will release block_mutex when it returns BUF_BLOCK_ZIP_FREE.

  ------------------------------------------------------------------------
  r3911 | sunny | 2009-01-13 14:15:24 +0200 (Tue, 13 Jan 2009) | 13 lines

  branches/5.1: Fix Bug#38187 Error 153 when creating savepoints
  InnoDB previously treated savepoints as a stack e.g.,
    SAVEPOINT a;
    SAVEPOINT b;
    SAVEPOINT c;
    SAVEPOINT b; <- This would delete b and c.

  This fix changes the behavior to:
    SAVEPOINT a;
    SAVEPOINT b;
    SAVEPOINT c;
    SAVEPOINT b; <- Does not delete savepoint c
  ------------------------------------------------------------------------
  r3930 | marko | 2009-01-14 15:51:30 +0200 (Wed, 14 Jan 2009) | 4 lines

  branches/5.1: dict_load_table(): If dict_load_indexes() fails,
  invoke dict_table_remove_from_cache() instead of dict_mem_table_free(),
  so that the data dictionary will not point to freed data.
  (Bug #42075, Issue #153, rb://76 approved by Heikki Tuuri)
  ------------------------------------------------------------------------

satisfy some conditions when UNIV_DEBUG is defined.

HASH_SEARCH(): New parameter: ASSERTION. All users will pass an appropriate
ut_ad() or nothing.

dict_table_add_to_columns(): Assert that the table being added to the data
dictionary cache is not already being pointed to by the name_hash and
id_hash tables.

HASH_SEARCH_ALL(): New macro, for use in dict_table_add_to_columns().

dict_mem_table_free(): Set ut_d(table->cached = FALSE), so that we can
check ut_ad(table->cached) when traversing the hash tables, as in
HASH_SEARCH(name_hash, dict_sys->table_hash, ...) and
HASH_SEARCH(id_hash, dict_sys->table_id_hash, ...).

dict_table_get_low(), dict_table_get_on_id_low(): Assert
ut_ad(!table || table->cached).

fil_space_get_by_id(): Check ut_ad(space->magic_n == FIL_SPACE_MAGIC_N)
in HASH_SEARCH(hash, fil_system->spaces, ...).

fil_space_get_by_name(): Check ut_ad(space->magic_n == FIL_SPACE_MAGIC_N)
in HASH_SEARCH(name_hash, fil_system->name_hash, ...).

buf_buddy_block_free(): Check that the blocks are in valid state in
HASH_SEARCH(hash, buf_pool->zip_hash, ...).

buf_page_hash_get(): Check that the blocks are in valid state in
HASH_SEARCH(hash, buf_pool->page_hash, ...).

get_share(), free_share(): Check ut_ad(share->use_count > 0) in
HASH_SEARCH(table_name_hash, innobase_open_tables, ...).

This was posted as rb://75 for tracking down errors similar to Issue #153.

row_create_table_for_mysql() already frees new_table.
Do not attempt to free it again.

that was introduced in r3879 (rb://73).

buf_page_t: Note that the LRU fields are protected by buf_pool_mutex
only, not block->mutex or buf_pool_zip_mutex.

buf_page_get_freed_page_clock(): Note that this is sometimes invoked
without mutex protection.

buf_pool_get_oldest_modification(): Note that the result may be out of
date.

buf_page_get_LRU_position(), buf_page_is_old(): Assert that the buffer
pool mutex is being held.

buf_page_release(): Assert that dirty blocks are in the flush list.

unless UNIV_DEBUG is defined.  mtr->magic_n is only assigned to
and checked in UNIV_DEBUG builds.

instead of the buffer pool mutex.  This is related to Issue #157.

in r3879.  Spotted by Sunny.

buf_flush_try_page(): Rename to buf_flush_page(), and change the
return type to void.  Replace the parameters space, offset with bpage,
and remove the second page hash lookup.  Note and assert that both
buf_pool_mutex and block_mutex must now be held upon entering the
function.  They will still be released by this function.

buf_flush_try_neighbors(): Replace buf_flush_try_page() with
buf_flush_page().  Make the logic easier to follow by not negating the
precondition of buf_flush_page().

rb://73 approved by Sunny Bains.  This is related to Issue #157.

remove dead code.

buf_flush_ready_for_flush(), buf_flush_try_page(): Assert that
flush_type is one of BUF_FLUSH_LRU or BUF_FLUSH_LIST.  The flush_type
comes from buf_flush_batch(), which already asserts this.  The
assertion holds for all calls in the source code.

buf_flush_try_page(): Remove the dead case BUF_FLUSH_SINGLE_PAGE
of switch (flush_type).

buf_flush_try_page(): Note why it is safe to access bpage without
holding buf_pool_mutex or block_mutex.

buf_page_struct: Note that space and offset are also protected by
buf_pool_mutex.  They are only assigned to by
buf_block_set_file_page().  Thus, it suffices for buf_flush_batch() to
hold just buf_pool_mutex when checking these fields.

buf_flush_try_page(): Rename "locked" to "is_s_latched", per Heikki's request.

buf_flush_batch(): Move the common statement mutex_exit(block_mutex)
from all if-else if-else branches before the if block.  Remove the
redundant test (buf_pool->init_flush[flush_type] == FALSE) that was
apparently copied from buf_flush_write_complete().

buf_flush_write_block_low(): Note why it is safe not to hold buf_pool_mutex
or block_mutex.  Enumerate the assumptions in debug assertions.

buf_flush_insert_sorted_into_flush_list(): Remove unused code.
Change the parameter to buf_block_t* block and assert that
block->state == BUF_BLOCK_FILE_PAGE.  This is part of Issue #155.

for caching the result of buf_page_get_state(bpage) == BUF_BLOCK_FILE_PAGE.

switch case before the switch block.

Add ChangeLog entries for r3795 r3796 r3797 r3798.

SYS_INDEXES when looking for partially created indexes.  Use the
transaction isolation level READ UNCOMMITTED to avoid interfering with
locks held by incomplete transactions that will be rolled back in a
subsequent step in the recovery.  (Issue #152)

Approved by Heikki Tuuri

helper functions that initialize some members of the transaction struct.
(Bug #41680)

innobase_trx_init(): New function: initialize some fields of a
transaction struct from a MySQL THD object.

innobase_trx_allocate(): New function: allocate and initialize a
transaction struct.

check_trx_exists(): Use the above two functions.

ha_innobase::delete_table(), ha_innobase::rename_table(),
ha_innobase::add_index(), ha_innobase::final_drop_index():
Use innobase_trx_allocate().

innobase_drop_database(): In the Windows plugin, initialize the trx_t
specially, because the THD is not available.  Otherwise, use
innobase_trx_allocate().

rb://69 accepted by Heikki Tuuri

if any of the fields are NULL.  While the tuples are equal in the
sorting order, SQL NULL is defined to be logically inequal to
anything else. (Bug #41904)

rb://70 approved by Heikki Tuuri