When we leak some tty buffer, warn about that. For that we need to
account the memory used also in the tty_buffer_free_all function. On
other locations, the accounting is handled correctly.
Note that we do not account the free list, as that was accounted in
tty_buffer_free before put on the free list.
I have been using this patch for ages, so let's see if anybody else
encounters any issues.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
struct tty_bufhead *buf = &port->buf;
struct tty_buffer *p, *next;
struct llist_node *llist;
+ unsigned int freed = 0;
+ int still_used;
while ((p = buf->head) != NULL) {
buf->head = p->next;
+ freed += p->size;
if (p->size > 0)
kfree(p);
}
buf->head = &buf->sentinel;
buf->tail = &buf->sentinel;
- atomic_set(&buf->mem_used, 0);
+ still_used = atomic_xchg(&buf->mem_used, 0);
+ WARN(still_used != freed, "we still have not freed %d bytes!",
+ still_used - freed);
}
/**