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Viewing changes to storage/innodb_plugin/buf/buf0lru.c

  • Committer: Bazaar Package Importer
  • Author(s): Chuck Short
  • Date: 2010-06-21 15:31:05 UTC
  • mfrom: (1.1.3 upstream)
  • mto: This revision was merged to the branch mainline in revision 6.
  • Revision ID: james.westby@ubuntu.com-20100621153105-pbbz3t6nyrf9t2zq
Tags: upstream-5.1.48
Import upstream version 5.1.48

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storage/innodb_plugin/buf/buf0lru.c
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Try to free a block.  If bpage is a descriptor of a compressed-only
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page, the descriptor object will be freed as well.
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NOTE: If this function returns BUF_LRU_FREED, it will not temporarily
 
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NOTE: If this function returns BUF_LRU_FREED, it will temporarily
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release buf_pool_mutex.  Furthermore, the page frame will no longer be
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accessible via bpage.
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        ut_ad(buf_page_in_file(bpage));
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        ut_ad(bpage->in_LRU_list);
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        ut_ad(!bpage->in_flush_list == !bpage->oldest_modification);
 
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#if UNIV_WORD_SIZE == 4
 
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        /* On 32-bit systems, there is no padding in buf_page_t.  On
 
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        other systems, Valgrind could complain about uninitialized pad
 
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        bytes. */
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        UNIV_MEM_ASSERT_RW(bpage, sizeof *bpage);
 
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#endif
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        if (!buf_page_can_relocate(bpage)) {
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                                ut_ad(prev_b->in_LRU_list);
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                                ut_ad(buf_page_in_file(prev_b));
 
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#if UNIV_WORD_SIZE == 4
 
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                                /* On 32-bit systems, there is no
 
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                                padding in buf_page_t.  On other
 
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                                systems, Valgrind could complain about
 
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                                uninitialized pad bytes. */
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                                UNIV_MEM_ASSERT_RW(prev_b, sizeof *prev_b);
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#endif
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                                UT_LIST_INSERT_AFTER(LRU, buf_pool->LRU,
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                                                     prev_b, b);
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        ut_a(buf_page_get_io_fix(bpage) == BUF_IO_NONE);
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        ut_a(bpage->buf_fix_count == 0);
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#if UNIV_WORD_SIZE == 4
 
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        /* On 32-bit systems, there is no padding in
 
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        buf_page_t.  On other systems, Valgrind could complain
 
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        about uninitialized pad bytes. */
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        UNIV_MEM_ASSERT_RW(bpage, sizeof *bpage);
 
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#endif
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        buf_LRU_remove_block(bpage);
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