diff options
| author |   Alan Maguire <alan.maguire@oracle.com> | 2020-09-28 12:31:07 +0100 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2020-09-28 18:26:58 -0700 |
| commit | af65320948b848dd1ae65eb4bc3e164c53e741d8 (patch) | |
| tree | 6197f2ee307a58595c58bd26bd0f0f806b03fb8c /kernel/bpf/bpf_iter.c | |
| parent | selftests/bpf: Add bpf_snprintf_btf helper tests (diff) | |
| download | linux-dev-af65320948b848dd1ae65eb4bc3e164c53e741d8.tar.xz linux-dev-af65320948b848dd1ae65eb4bc3e164c53e741d8.zip | |
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: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/1601292670-1616-6-git-send-email-alan.maguire@oracle.com
Diffstat (limited to 'kernel/bpf/bpf_iter.c')
| -rw-r--r-- | kernel/bpf/bpf_iter.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/bpf/bpf_iter.c b/kernel/bpf/bpf_iter.c index 30833bbf3019..8f10e30ea0b0 100644 --- a/kernel/bpf/bpf_iter.c +++ b/kernel/bpf/bpf_iter.c @@ -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; |