Done away with following two status variables:

innodb_buffer_pool_read_ahead_rnd
innodb_buffer_pool_read_ahead_seq

Introduced two new status variables:
innodb_buffer_pool_read_ahead = number of pages read as part of
readahead since server startup
innodb_buffer_pool_read_ahead_evicted = number of pages that are read
in as readahead but were evicted before ever being accessed since
server startup i.e.: a measure of how badly our readahead is
performing

SHOW INNODB STATUS will show two extra numbers in buffer pool section:
pages read ahead/sec and pages evicted without access/sec

Approved by: Marko

return DB_CORRUPTION (HA_ERR_CRASHED) instead of abnormally
terminating the server.  Also, disable the previously added diagnostic
output to the error log, because mysql-test-run does not like extra
output in the error log.  (Bug #44571)

dict_index_add_to_cache(): Handle errors from dict_index_find_cols().

mysql-test/innodb_bug44571.test: A test case for triggering the bug.

rb://135 approved by Sunny Bains.

corrupt the created indexes.

row_merge(): Make "half" an in/out parameter. Determine the offset of
half the output file. Copy the last blocks record-by-record instead of
block-by-block, so that the records can be counted. Check that the
input and output have matching n_rec.

row_merge_sort(): Do not assume that two blocks of size N are merged
into a block of size 2*N. The output block can be shorter than the
input if the last page of each input block is almost empty. Use an
accurate termination condition, based on the "half" computed by
row_merge().

row_merge_read(), row_merge_write(), row_merge_blocks(): Add debug output.

merge_file_t, row_merge_file_create(): Add n_rec, the number of records
in the merge file.

row_merge_read_clustered_index(): Update n_rec.

row_merge_blocks(): Update and check n_rec.

row_merge_blocks_copy(): New function, for copying the last blocks in
row_merge().  Update and check n_rec.

This bug was discovered with a user-supplied test case that creates an
index where the initial temporary file is 249 one-megabyte blocks and
the merged files become smaller. In the test, possible merge record
sizes are 10, 18, and 26 bytes.

rb://150 approved by Sunny Bains.  This addresses Issue #320.

size with the settable global variable innodb_old_blocks_pct. The
minimum and maximum values are 5 and 95 per cent, respectively. The
default is 100*3/8, in line with the old behavior.

ut_time_ms(): New utility function, to return the current time in
milliseconds. TODO: Is there a more efficient timestamp function, such
as rdtsc divided by a power of two?

buf_LRU_old_threshold_ms: New variable, corresponding to
innodb_old_blocks_time. The value 0 is the default behaviour: no
timeout before making blocks 'new'.

bpage->accessed, bpage->LRU_position, buf_pool->ulint_clock: Remove.

bpage->access_time: New field, replacing bpage->accessed. Protected by
buf_pool_mutex instead of bpage->mutex. Updated when a page is created
or accessed the first time in the buffer pool.

buf_LRU_old_ratio, innobase_old_blocks_pct: New variables,
corresponding to innodb_old_blocks_pct

buf_LRU_old_ratio_update(), innobase_old_blocks_pct_update(): Update
functions for buf_LRU_old_ratio, innobase_old_blocks_pct.

buf_page_peek_if_too_old(): Compare ut_time_ms() to bpage->access_time
if buf_LRU_old_threshold_ms && bpage->old.  Else observe
buf_LRU_old_ratio and bpage->freed_page_clock.

buf_pool_t: Add n_pages_made_young, n_pages_not_made_young,
n_pages_made_young_old, n_pages_not_made_young, for statistics.

buf_print(): Display buf_pool->n_pages_made_young,
buf_pool->n_pages_not_made_young.  This function is only for crash
diagnostics.

buf_print_io(): Display buf_pool->LRU_old_len and quantities derived
from buf_pool->n_pages_made_young, buf_pool->n_pages_not_made_young.
This function is invoked by SHOW ENGINE INNODB STATUS.

rb://129 approved by Heikki Tuuri.  This addresses Bug #45015.

The call to put IO threads to sleep was most probably meant for Windows
only as the comment in buf0rea.c suggests. However it was enabled on
all platforms. This patch restricts the sleep call to windows. This
approach of not putting threads to sleep makes even more sense because
now we have multiple threads working in the background and it probably
is not a good idea to put all of them to sleep because a user thread
wants to post a batch for readahead.

Approved by: Marko

Fix typo.

Merge a change from MySQL:

 http://lists.mysql.com/commits/80832

 2968 Jonathan Perkin	2009-08-14
      Build fixes for Windows, AIX, HP/UX and Sun Studio11, from Timothy Smith.
      modified:
        CMakeLists.txt
        cmd-line-utils/readline/util.c
        storage/innodb_plugin/handler/i_s.cc
        storage/innodb_plugin/include/univ.i

This comment was provoked by Inaam.

ChangeLog:
Follow the convention from the rest of the ChangeLog: for bugfixes from
bugs.mysql.com only the bug number and title goes in the ChangeLog. Detailed
explanation on what is the problem and how it was fixed is present in
the bugs database.

White-space fixup.

branches/zip: Fix bug# 46650:  Innodb assertion autoinc_lock == lock in lock_table_remove_low on INSERT SELECT

We only store the autoinc locks that are granted in the transaction's autoinc
lock vector. A transacton, that has been rolled back due to a deadlock because
of an AUTOINC lock attempt, will not have added that lock to the vector. We
need to check for that when we remove that lock.

rb://145
Approved by Marko.

move access to the this variable within a !UNIV_HOTBACKUP block.

after a successful operation, read innodb_table->flags from
the newly created table object, not from the old one that was just freed.

Approved by Sunny.

This is a non-functional change.

parameter partial. If savept==NULL, partial==FALSE.

do not tell Valgrind that the memory is free, to avoid
a bogus warning in Valgrind's built-in free() hook.

This should help track down Mantis Issue #289.

to avoid problems with Doxygen XML output.

Revert the dummy change from c5625.

(after resolving the conflict Makefile.am was not changed so I have made
a dummy change so I can commit and thus record that branches/5.1 has been
merged in branches/zip up to 5622):

  ------------------------------------------------------------------------
  r5622 | vasil | 2009-08-03 15:27:00 +0300 (Mon, 03 Aug 2009) | 20 lines
  Changed paths:
     M /branches/5.1/Makefile.am
  
  branches/5.1:
  
  Merge a change from MySQL:
  
    ------------------------------------------------------------
    revno: 2988
    committer: Satya B <satya.bn@sun.com>
    branch nick: mysql-5.1-bugteam
    timestamp: Wed 2009-07-01 11:06:05 +0530
    message:
      Fix build failure after applying Innodb snapshot 5.1-ss5282
      
      After applying Innodb snapshot 5.1-ss5282, build was broken
      because of missing header file. 
      
      Adding the header file to Makefile.am after informing the 
      innodb developers.
    modified:
      storage/innobase/Makefile.am
  
  ------------------------------------------------------------------------

Add fsp0types.h to the list of noinst_HEADERS

Suggested by:	Sergey Vojtovich <svoj@sun.com>

Add a test program to check whether the PAUSE instruction is available.

Fixups in ChangeLog: sort filenames alphabetically and wrap to 78 chars per
line.

Change the read ahead parameter name to innodb_read_ahead_threshold.
Change the meaning of this parameter to signify the number of pages
that must be sequentially accessed for InnoDB to trigger a readahead
request.

Suggested by: Ken

Add ChangeLog entries for r5498 and r5519.

  ------------------------------------------------------------------------
  r5518 | vasil | 2009-07-20 11:29:47 +0300 (Mon, 20 Jul 2009) | 22 lines
  Changed paths:
     M /branches/5.1/handler/ha_innodb.cc
  
  branches/5.1:
  
  Merge a change from MySQL:
  
    ------------------------------------------------------------
    revno: 2874.2.1
    committer: Anurag Shekhar <anurag.shekhar@sun.com>
    branch nick: mysql-5.1-bugteam-windows-warning
    timestamp: Wed 2009-05-13 15:41:24 +0530
    message:
      Bug #39802 On Windows, 32-bit time_t should be enforced
      
      This patch fixes compilation warning, "conversion from 'time_t' to 'ulong', 
      possible loss of data". 
      The fix is to typecast time_t to ulong before assigning it to ulong. 
      Backported this from 6.0-bugteam tree.
    modified:
      storage/archive/ha_archive.cc
      storage/federated/ha_federated.cc
      storage/innobase/handler/ha_innodb.cc
      storage/myisam/ha_myisam.cc
  
  ------------------------------------------------------------------------

been introduced called hb_univ.i. This file should have all the HotBackup
specific configuration.