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seq_file: account everything to kmemcg 

All it takes to open a file and read 1 byte from it.

seq_file will be allocated along with any private allocations, and more
importantly seq file buffer which is 1 page by default.

Link: http://lkml.kernel.org/r/20180310085252.GB17121@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Glauber Costa <glommer@gmail.com>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hifive-unleashed-5.1
Alexey Dobriyan 2018-04-10 16:34:49 -07:00 committed by Linus Torvalds
parent 0965232035
commit d64d01a155
1 changed files with 4 additions and 4 deletions
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8
fs/seq_file.c
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@ -29,7 +29,7 @@ static void seq_set_overflow(struct seq_file *m)
static void *seq_buf_alloc(unsigned long size)
{
return kvmalloc(size, GFP_KERNEL);
return kvmalloc(size, GFP_KERNEL_ACCOUNT);
}
/**
@ -566,7 +566,7 @@ static void single_stop(struct seq_file *p, void *v)
int single_open(struct file *file, int (*show)(struct seq_file *, void *),
void *data)
{
struct seq_operations *op = kmalloc(sizeof(*op), GFP_KERNEL);
struct seq_operations *op = kmalloc(sizeof(*op), GFP_KERNEL_ACCOUNT);
int res = -ENOMEM;
if (op) {
@ -628,7 +628,7 @@ void *__seq_open_private(struct file *f, const struct seq_operations *ops,
void *private;
struct seq_file *seq;
private = kzalloc(psize, GFP_KERNEL);
private = kzalloc(psize, GFP_KERNEL_ACCOUNT);
if (private == NULL)
goto out;
@ -1112,5 +1112,5 @@ EXPORT_SYMBOL(seq_hlist_next_percpu);
void __init seq_file_init(void)
{
seq_file_cache = KMEM_CACHE(seq_file, SLAB_PANIC);
seq_file_cache = KMEM_CACHE(seq_file, SLAB_ACCOUNT|SLAB_PANIC);
}