On 08/05, Andrii Nakryiko wrote:
>
> On Mon, Aug 5, 2024 at 8:59 AM Oleg Nesterov wrote:
> >
> > > int uprobe_apply(struct uprobe *uprobe, struct uprobe_consumer *uc, bool
> > > add)
> > > {
> > > struct uprobe_consumer *con;
> > > - int ret = -ENOENT;
> > > + int ret = -ENOENT, s
On Mon, Aug 5, 2024 at 8:59 AM Oleg Nesterov wrote:
>
> On 07/31, Andrii Nakryiko wrote:
> >
> > @@ -1120,17 +1098,19 @@ void uprobe_unregister(struct uprobe *uprobe,
> > struct uprobe_consumer *uc)
> > int err;
> >
> > down_write(&uprobe->register_rwsem);
> > - if (WARN_ON(!consu
On 07/31, Andrii Nakryiko wrote:
>
> @@ -1120,17 +1098,19 @@ void uprobe_unregister(struct uprobe *uprobe, struct
> uprobe_consumer *uc)
> int err;
>
> down_write(&uprobe->register_rwsem);
> - if (WARN_ON(!consumer_del(uprobe, uc))) {
> - err = -ENOENT;
OK, I agree, th
On Thu, Aug 1, 2024 at 7:27 AM Jiri Olsa wrote:
>
> On Wed, Jul 31, 2024 at 02:42:53PM -0700, Andrii Nakryiko wrote:
>
> SNIP
>
> > static int __copy_insn(struct address_space *mapping, struct file *filp,
> > void *insn, int nbytes, loff_t offset)
> > {
> > @@ -924,7 +901,8
On Wed, Jul 31, 2024 at 02:42:53PM -0700, Andrii Nakryiko wrote:
SNIP
> static int __copy_insn(struct address_space *mapping, struct file *filp,
> void *insn, int nbytes, loff_t offset)
> {
> @@ -924,7 +901,8 @@ static bool filter_chain(struct uprobe *uprobe, struct
> mm_
uprobe->register_rwsem is one of a few big bottlenecks to scalability of
uprobes, so we need to get rid of it to improve uprobe performance and
multi-CPU scalability.
First, we turn uprobe's consumer list to a typical doubly-linked list
and utilize existing RCU-aware helpers for traversing such li
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