fs/dirty_pages: dump the number of dirty pages for each inode

【特性描述】
RTOS要支持对buffer IO机制下的IO流量分析能力，其中一个重要的分析项就是分析buffer IO中文件脏页的信息。dirty_page特性能够支持打印inode的脏页信息。从OLK-5.10回合至OLK-6.6。
【特性竞争力】
能够分析buffer IO的性能，提升IO流量分析能力。
【硬件架构】
NA
【特性约束】
依赖CONFIG_DIRTY_PAGES
【涉及仓库】
openEuler/kernel
【交付个人/团队】
wozizhi
【验证信息】
特性依赖：
CONFIG_DIRTY_PAGES=y

用例：
#!/bin/bash                                                                                                   
mkfs.ext4 -F /dev/vdb                                        
mount /dev/vdb /mnt/test
                                                                   
file_prefix="file"                                           
file_dir="/mnt/test"                                         
int=1                                                                                    
echo 1 > /proc/dirty/buffer_size                             
#echo 10000 > /proc/sys/vm/dirty_writeback_centisecs
                                       
while (( "$int < 100" ))                                     
do                                                           
    echo "$int"                                              
    let "int++"                                              
    file_name="$file_prefix-$(date +'%Y%m%d%H%M%S')-$int.txt"
    echo "This is a small file." > $file_dir/$file_name      
    echo "Created file: $file_name"                          
    sleep 0.1                                                
done                                                         
                                                             
umount /dev/vdb                                              
cat /proc/dirty/dirty_list

输出脏页：
[root@fedora dirty]# cat dirty_list                                                            
FSType: btrfs, Dev ID: 20(0:20) ino 18430616, dirty pages 1, path /var/log/messages            
FSType: btrfs, Dev ID: 20(0:20) ino 18440616, dirty pages 477, path /var/log/journal/5c02d1b4b9
4b0a9c79159df4b0d265/system.journal                                                            
FSType: btrfs, Dev ID: 20(0:20) ino 1, dirty pages 32, path unknown                            
FSType: ext4, Dev ID: 265289744(253:16) ino 36, dirty pages 1, path /file-20240108211242-26.txt
FSType: ext4, Dev ID: 265289744(253:16) ino 35, dirty pages 1, path /file-20240108211242-25.txt
FSType: ext4, Dev ID: 265289744(253:16) ino 34, dirty pages 1, path /file-20240108211242-24.txt
FSType: ext4, Dev ID: 265289744(253:16) ino 33, dirty pages 1, path /file-20240108211242-23.txt
FSType: ext4, Dev ID: 265289744(253:16) ino 32, dirty pages 1, path /file-20240108211242-22.txt
FSType: ext4, Dev ID: 265289744(253:16) ino 31, dirty pages 1, path /file-20240108211242-21.txt
FSType: ext4, Dev ID: 265289744(253:16) ino 30, dirty pages 1, path /file-20240108211241-20.txt
FSType: ext4, Dev ID: 265289744(253:16) ino 29, dirty pages 1, path /file-20240108211241-19.txt
FSType: ext4, Dev ID: 265289744(253:16) ino 28, dirty pages 1, path /file-20240108211241-18.txt
FSType: ext4, Dev ID: 265289744(253:16) ino 27, dirty pages 1, path /file-20240108211241-17.txt
FSType: ext4, Dev ID: 265289744(253:16) ino 26, dirty pages 1, path /file-20240108211241-16.txt
FSType: ext4, Dev ID: 265289744(253:16) ino 25, dirty pages 1, path /file-20240108211241-15.txt
FSType: ext4, Dev ID: 265289744(253:16) ino 24, dirty pages 1, path /file-20240108211241-14.txt
FSType: ext4, Dev ID: 265289744(253:16) ino 23, dirty pages 1, path /file-20240108211241-13.txt
FSType: ext4, Dev ID: 265289744(253:16) ino 22, dirty pages 1, path /file-20240108211241-12.txt
FSType: ext4, Dev ID: 265289744(253:16) ino 21, dirty pages 1, path /file-20240108211240-11.txt
FSType: ext4, Dev ID: 265289744(253:16) ino 20, dirty pages 1, path /file-20240108211240-10.txt
..........

正常打印脏页。

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