Commit af653209 authored by Alan Maguire's avatar Alan Maguire Committed by Alexei Starovoitov
Browse files

bpf: Bump iter seq size to support BTF representation of large data structures 



BPF iter size is limited to PAGE_SIZE; if we wish to display BTF-based
representations of larger kernel data structures such as task_struct,
this will be insufficient.

Suggested-by: default avatarAlexei Starovoitov <alexei.starovoitov@gmail.com>
Signed-off-by: default avatarAlan Maguire <alan.maguire@oracle.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/1601292670-1616-6-git-send-email-alan.maguire@oracle.com
parent 076a95f5

kernel/bpf/bpf_iter.c

+2 −2
Original line number Diff line number Diff line
@@ -88,8 +88,8 @@ static ssize_t bpf_seq_read(struct file *file, char __user *buf, size_t size, 
	mutex_lock(&seq->lock);



	if (!seq->buf) {

		seq->size = PAGE_SIZE;

		seq->buf = kmalloc(seq->size, GFP_KERNEL);

		seq->size = PAGE_SIZE << 3;

		seq->buf = kvmalloc(seq->size, GFP_KERNEL);

		if (!seq->buf) {

			err = -ENOMEM;

			goto done;