硬盘扇区的读写函数及其调用路径

    几种情况下的调用路径

    1）

    8044 "pdflush" c68be034 {   } | __ide_do_rw_disk | ide_do_rw_disk | start_request | ide_do_request | do_ide_request | __generic_unplug_device | __elv_add_request | __make_request | generic_make_request | submit_bio | mpage_bio_submit | __mpage_writepage | mpage_writepages | ext2_writepages | do_writepages | __sync_single_inode | __writeback_single_inode | generic_sync_sb_inodes | sync_sb_inodes | writeback_inodes | wb_kupdate | __pdflush | pdflush | kthread | kernel_thread_helper

    2）

    1288 "kjournald" de850034 {   } | __ide_do_rw_disk | ide_do_rw_disk | start_request | ide_do_request | do_ide_request | __generic_unplug_device | generic_unplug_device | blk_backing_dev_unplug | sync_buffer | __wait_on_bit | out_of_line_wait_on_bit | __wait_on_buffer | sync_dirty_buffer | journal_write_commit_record | journal_commit_transaction | kjournald | kernel_thread_helper

    3）

    4409 "syslog-ng" dccf6034 {   } | __ide_do_rw_disk | ide_do_rw_disk | start_request | ide_do_request | do_ide_request | __generic_unplug_device | cfq_start_queueing | cfq_crq_enqueued | cfq_enqueue | cfq_insert_request | __elv_add_request | __make_request | generic_make_request | submit_bio | submit_bh | __block_write_full_page | block_write_full_page | ext3_ordered_writepage | mpage_writepages | do_writepages | __filemap_fdatawrite_range | filemap_fdatawrite | do_fsync | sys_fsync | sysenter_past_esp

    4）

    448 "kblockd/0" dfe20034 {   } | __ide_do_rw_disk | ide_do_rw_disk | start_request | ide_do_request | do_ide_request | cfq_kick_queue | worker_thread | kthread | kernel_thread_helper

    希望对分析DISK IO的关系有一点帮助。

    CODE