Hello,
On Wed, Feb 21, 2024 at 9:24 AM Alexei Starovoitov
wrote:
>
> On Mon, Feb 19, 2024 at 7:51 PM Menglong Dong
> wrote:
> >
> > For now, the BPF program of type BPF_PROG_TYPE_TRACING is not allowed to
> > be attached to multiple hooks, and we have to create a BPF program for
> > each kernel
On Wed, Feb 21, 2024 at 10:35 AM 梦龙董 wrote:
>
> Hello,
>
> On Wed, Feb 21, 2024 at 9:24 AM Alexei Starovoitov
> wrote:
> >
> > On Mon, Feb 19, 2024 at 7:51 PM Menglong Dong
> > wrote:
> > >
> > > For now, the BPF program of type BPF_PROG_
On Wed, Feb 21, 2024 at 1:18 AM Jiri Olsa wrote:
>
> On Tue, Feb 20, 2024 at 11:51:01AM +0800, Menglong Dong wrote:
>
> SNIP
>
> > +static int get_ctx_arg_idx_aligned(struct btf *btf, const struct btf_type
> > *t,
> > +int off)
> > +{
> > + const struct btf_par
On Wed, Feb 21, 2024 at 11:02 AM Alexei Starovoitov
wrote:
>
> On Tue, Feb 20, 2024 at 6:45 PM 梦龙董 wrote:
> >
> > On Wed, Feb 21, 2024 at 10:35 AM 梦龙董 wrote:
> > >
> > > Hello,
> > >
> > > On Wed, Feb 21, 2024 at 9:24 AM Alexei Starovoitov
&
On Wed, Feb 21, 2024 at 2:22 AM Kui-Feng Lee wrote:
>
>
>
> On 2/19/24 19:51, Menglong Dong wrote:
> > In this commit, we add the 'accessed_args' field to struct bpf_prog_aux,
> > which is used to record the accessed index of the function args in
> > btf_ctx_access().
> >
> > Meanwhile, we add the
On Wed, Feb 21, 2024 at 11:18 AM Alexei Starovoitov
wrote:
>
> On Tue, Feb 20, 2024 at 7:06 PM 梦龙董 wrote:
> >
> > On Wed, Feb 21, 2024 at 11:02 AM Alexei Starovoitov
> > wrote:
> > >
> > > On Tue, Feb 20, 2024 at 6:45 PM 梦龙董 wrote:
> >
On Mon, Mar 11, 2024 at 11:29 PM Quentin Monnet wrote:
>
> 2024-03-11 09:35 UTC+ ~ Menglong Dong
> > Add support for the attach types of:
> >
> > BPF_TRACE_FENTRY_MULTI
> > BPF_TRACE_FEXIT_MULTI
> > BPF_MODIFY_RETURN_MULTI
> >
> > Signed-off-by: Menglong Dong
> > ---
> > tools/bpf/bpftool/c
On Tue, Mar 12, 2024 at 9:49 AM Alexei Starovoitov
wrote:
>
> On Mon, Mar 11, 2024 at 2:34 AM Menglong Dong
> wrote:
> >
> > Refactor the struct modules_array to more general struct ptr_array, which
> > is used to store the pointers.
> >
> > Meanwhiles, introduce the bpf_try_add_ptr(), which chec
On Tue, Mar 12, 2024 at 9:46 AM Alexei Starovoitov
wrote:
>
> On Mon, Mar 11, 2024 at 2:34 AM Menglong Dong
> wrote:
> >
> > In this commit, we add the 'accessed_args' field to struct bpf_prog_aux,
> > which is used to record the accessed index of the function args in
> > btf_ctx_access().
> >
>
On Tue, Mar 12, 2024 at 9:55 AM Alexei Starovoitov
wrote:
>
> On Mon, Mar 11, 2024 at 2:35 AM Menglong Dong
> wrote:
> >
> > By default, the kernel btf that we load during loading program will be
> > freed after the programs are loaded in bpf_object_load(). However, we
> > still need to use these
On Tue, Mar 12, 2024 at 10:09 AM Alexei Starovoitov
wrote:
>
> On Mon, Mar 11, 2024 at 7:01 PM 梦龙董 wrote:
> >
> > On Tue, Mar 12, 2024 at 9:46 AM Alexei Starovoitov
> > wrote:
> > >
> > > On Mon, Mar 11, 2024 at 2:34 AM Menglong Dong
> > >
On Tue, Mar 12, 2024 at 9:56 AM Alexei Starovoitov
wrote:
>
> On Mon, Mar 11, 2024 at 2:35 AM Menglong Dong
> wrote:
> >
> >
> > - err = libbpf_find_attach_btf_id(prog, attach_name,
> > &btf_obj_fd, &btf_type_id);
> > + name_end = strchr(attach_name, ',');
> > +
On Tue, Mar 12, 2024 at 10:42 AM 梦龙董 wrote:
>
> On Tue, Mar 12, 2024 at 10:09 AM Alexei Starovoitov
> wrote:
> >
> > On Mon, Mar 11, 2024 at 7:01 PM 梦龙董 wrote:
> > >
> > > On Tue, Mar 12, 2024 at 9:46 AM Alexei Starovoitov
> > > wrote:
> >
On Tue, Mar 12, 2024 at 10:13 AM Alexei Starovoitov
wrote:
>
> On Mon, Mar 11, 2024 at 7:05 PM 梦龙董 wrote:
> >
> > > >
> > > > +LIBBPF_API void bpf_object__free_btfs(struct bpf_object *obj);
> > > > +
> > >
> > > It shouldn'
On Tue, Mar 12, 2024 at 9:51 AM Alexei Starovoitov
wrote:
>
> On Mon, Mar 11, 2024 at 2:35 AM Menglong Dong
> wrote:
> >
> > Add target btf to the function args of bpf_check_attach_target(), then
> > the caller can specify the btf to check.
> >
> > Signed-off-by: Menglong Dong
> > ---
> > inclu
On Wed, Mar 13, 2024 at 12:12 AM Alexei Starovoitov
wrote:
>
> On Mon, Mar 11, 2024 at 7:44 PM 梦龙董 wrote:
> >
> > On Tue, Mar 12, 2024 at 9:56 AM Alexei Starovoitov
> > wrote:
> > >
> > > On Mon, Mar 11, 2024 at 2:35 AM Menglong Dong
> > >
On Wed, Mar 13, 2024 at 12:42 AM Alexei Starovoitov
wrote:
>
> On Mon, Mar 11, 2024 at 7:42 PM 梦龙董 wrote:
> >
[..]
>
> I see.
> I thought you're sharing the trampoline across attachments.
> (since bpf prog is the same).
That seems to be a good idea, which I
On Thu, Mar 14, 2024 at 8:27 AM Alexei Starovoitov
wrote:
>
> On Tue, Mar 12, 2024 at 6:53 PM 梦龙董 wrote:
[..]
> > What does "a hundred attachments max" means? Can't I
> > trace thousands of kernel functions with a bpf program of
> > tracing multi-lin
On Thu, Mar 14, 2024 at 2:29 PM Jiri Olsa wrote:
>
> On Wed, Mar 13, 2024 at 05:25:35PM -0700, Alexei Starovoitov wrote:
> > On Tue, Mar 12, 2024 at 6:53 PM 梦龙董 wrote:
> > >
> > > On Wed, Mar 13, 2024 at 12:42 AM Alexei Starovoitov
> > > wrote:
> > &
On Fri, Mar 15, 2024 at 4:00 PM 梦龙董 wrote:
>
> On Thu, Mar 14, 2024 at 8:27 AM Alexei Starovoitov
> wrote:
> >
> > On Tue, Mar 12, 2024 at 6:53 PM 梦龙董 wrote:
> [..]
> > > What does "a hundred attachments max" means? Can't I
> > >
On Thu, Mar 28, 2024 at 11:11 PM Steven Rostedt wrote:
>
> On Thu, 28 Mar 2024 22:43:46 +0800
> 梦龙董 wrote:
>
> > I have done a simple benchmark on creating 1000
> > trampolines. It is slow, quite slow, which consume up to
> > 60s. We can't do it this way.
On Fri, Mar 29, 2024 at 7:17 AM Alexei Starovoitov
wrote:
>
> On Thu, Mar 28, 2024 at 8:10 AM Steven Rostedt wrote:
> >
> > On Thu, 28 Mar 2024 22:43:46 +0800
> > 梦龙董 wrote:
> >
> > > I have done a simple benchmark on creating 1000
> > > trampoli
On Sat, Mar 30, 2024 at 7:28 AM Andrii Nakryiko
wrote:
>
> On Thu, Mar 28, 2024 at 8:10 AM Steven Rostedt wrote:
> >
> > On Thu, 28 Mar 2024 22:43:46 +0800
> > 梦龙董 wrote:
> >
> > > I have done a simple benchmark on creating 1000
> > > trampoli
On Sun, Mar 31, 2024 at 3:34 AM Steven Rostedt wrote:
>
> On Sat, 30 Mar 2024 11:18:29 +0800
> 梦龙董 wrote:
>
> > > If you really want to have thousands of functions, why not just register
> > > it
> > > with ftrace itself. It will give you the arguments via
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