block dump

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「block dump」(2009/02/26 (木) 14:36:29) の最新版変更点

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削除された行は赤色になります。

 # dump on
 echo -n 1 > /proc/sys/vm/block_dump
 # dump off
 echo -n 0 > /proc/sys/vm/block_dump

 block/ll_rw_blk.c
     if (unlikely(block_dump)) {
         char b[BDEVNAME_SIZE];
         printk(KERN_DEBUG "%s(%d): %s block %Lu on %s\n",
             current->comm, current->pid,
             (rw & WRITE) ? "WRITE" : "READ",
             (unsigned long long)bio->bi_sector,
             bdevname(bio->bi_bdev,b));
     } 

 fs/fs-writeback.c
     if (unlikely(block_dump)) {
         struct dentry *dentry = NULL;
         const char *name = "?";
 
         if (!list_empty(&inode->i_dentry)) {
             dentry = list_entry(inode->i_dentry.next,
                         struct dentry, d_alias);
             if (dentry && dentry->d_name.name)
                 name = (const char *) dentry->d_name.name;
         }
 
         if (inode->i_ino || strcmp(inode->i_sb->s_id, "bdev"))
             printk(KERN_DEBUG
                    "%s(%d): dirtied inode %lu (%s) on %s\n",
                    current->comm, current->pid, inode->i_ino,
                    name, inode->i_sb->s_id);
     }