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hugetlbfs: use tracepoints in hugetlbfs functions.

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Here we use the hugetlbfs tracepoint to track the call stack. And
the output in trace is as follows:

```
   touch-5265    [005] .....    43.246550: hugetlbfs_alloc_inode: dev 0,51 ino 24621 dir 21959 mode 0100644
   touch-5265    [005] .....    43.246638: hugetlbfs_setattr: dev 0,51 ino 24621 name testfile valid 0x20070 mode 0177777 old_size 0 size -51622648042749952
truncate-5266    [005] .....    45.590890: hugetlbfs_setattr: dev 0,51 ino 24621 name testfile valid 0x2068 mode 00 old_size 0 size 2097152
rm-5273    [007] .....   110.052783: hugetlbfs_evict_inode: dev 0,51 ino 24621 mode 0100644 size 2097152 nlink 0 seals 1 blocks 0
  <idle>-0       [007] ..s1.   110.059441: hugetlbfs_free_inode: dev 0,51 ino 24621 mode 0100644 size 2097152 nlink 0 seals 1 blocks 0
```

Signed-off-by: Hongbo Li <lihongbo22@huawei.com>
Link: https://lore.kernel.org/r/20240829064110.67884-3-lihongbo22@huawei.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Hongbo Li 2024-08-29 14:41:10 +08:00 committed by Christian Brauner
parent 318580ad7f
commit 014ad7c42a
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
1 changed files with 15 additions and 2 deletions
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17
fs/hugetlbfs/inode.c
View File

@ -39,6 +39,9 @@
#include <linux/uaccess.h>
#include <linux/sched/mm.h>
#define CREATE_TRACE_POINTS
#include <trace/events/hugetlbfs.h>
static const struct address_space_operations hugetlbfs_aops;
static const struct file_operations hugetlbfs_file_operations;
static const struct inode_operations hugetlbfs_dir_inode_operations;
@ -687,6 +690,7 @@ static void hugetlbfs_evict_inode(struct inode *inode)
{
struct resv_map *resv_map;
trace_hugetlbfs_evict_inode(inode);
remove_inode_hugepages(inode, 0, LLONG_MAX);
/*
@ -814,8 +818,10 @@ static long hugetlbfs_fallocate(struct file *file, int mode, loff_t offset,
if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
return -EOPNOTSUPP;
if (mode & FALLOC_FL_PUNCH_HOLE)
return hugetlbfs_punch_hole(inode, offset, len);
if (mode & FALLOC_FL_PUNCH_HOLE) {
error = hugetlbfs_punch_hole(inode, offset, len);
goto out_nolock;
}
/*
* Default preallocate case.
@ -919,6 +925,9 @@ static long hugetlbfs_fallocate(struct file *file, int mode, loff_t offset,
inode_set_ctime_current(inode);
out:
inode_unlock(inode);
out_nolock:
trace_hugetlbfs_fallocate(inode, mode, offset, len, error);
return error;
}
@ -935,6 +944,8 @@ static int hugetlbfs_setattr(struct mnt_idmap *idmap,
if (error)
return error;
trace_hugetlbfs_setattr(inode, dentry, attr);
if (ia_valid & ATTR_SIZE) {
loff_t oldsize = inode->i_size;
loff_t newsize = attr->ia_size;
@ -1033,6 +1044,7 @@ static struct inode *hugetlbfs_get_inode(struct super_block *sb,
break;
}
lockdep_annotate_inode_mutex_key(inode);
trace_hugetlbfs_alloc_inode(inode, dir, mode);
} else {
if (resv_map)
kref_put(&resv_map->refs, resv_map_release);
@ -1272,6 +1284,7 @@ static struct inode *hugetlbfs_alloc_inode(struct super_block *sb)
static void hugetlbfs_free_inode(struct inode *inode)
{
trace_hugetlbfs_free_inode(inode);
kmem_cache_free(hugetlbfs_inode_cachep, HUGETLBFS_I(inode));
}