From: Oleg Nesterov <oleg@redhat.com>
To: "David Hildenbrand (Arm)" <david@kernel.org>
Cc: Darko Tominac <dtominac@cisco.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@kernel.org>, Ian Rogers <irogers@google.com>,
Adrian Hunter <adrian.hunter@intel.com>,
James Clark <james.clark@linaro.org>,
Andrew Morton <akpm@linux-foundation.org>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
Lorenzo Stoakes <ljs@kernel.org>,
Vlastimil Babka <vbabka@kernel.org>, Jann Horn <jannh@google.com>,
xe-linux-external@cisco.com, danielwa@cisco.com,
linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org,
linux-perf-users@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH] mm/madvise: preserve uprobe breakpoints across MADV_DONTNEED
Date: Wed, 29 Apr 2026 17:24:25 +0200 [thread overview]
Message-ID: <afIiqR5CqYRId0N0@redhat.com> (raw)
In-Reply-To: <889e4186-9f75-45d3-bd9a-1c90b218a635@kernel.org>
On 04/29, David Hildenbrand (Arm) wrote:
>
> On 4/29/26 15:15, Darko Tominac wrote:
>
> > uprobe infrastructure does not re-instrument pages on individual page
> > faults (uprobe_mmap() is only called during VMA creation, not on
> > page-in), the breakpoints are silently lost once the discarded pages are
> > re-read from the backing file. The probes stop firing with no error
> > indication, and the only recovery is to unregister and re-register the
> > affected uprobes.
>
> Right. Don't MADV_DONTNEED uprobes, just like you are not supposed to
> MADV_DONTNEED debugger breakpoints/set data etc. :)
Agreed, thanks.
Oleg.
next prev parent reply other threads:[~2026-04-29 15:24 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-29 13:15 [PATCH] mm/madvise: preserve uprobe breakpoints across MADV_DONTNEED Darko Tominac
2026-04-29 13:31 ` David Hildenbrand (Arm)
2026-04-29 15:24 ` Oleg Nesterov [this message]
2026-04-29 21:11 ` Daniel Walker (danielwa)
2026-04-30 9:16 ` Oleg Nesterov
2026-04-30 9:54 ` David Hildenbrand (Arm)
2026-04-30 18:46 ` Oleg Nesterov
2026-04-30 19:11 ` Jann Horn
2026-04-30 15:22 ` Jann Horn
2026-04-30 19:25 ` Daniel Walker (danielwa)
2026-05-01 19:25 ` David Hildenbrand (Arm)
2026-04-29 20:38 ` Darko Tominac -X (dtominac - GLOBALLOGIC INC at Cisco)
2026-04-29 17:33 ` sashiko-bot
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=afIiqR5CqYRId0N0@redhat.com \
--to=oleg@redhat.com \
--cc=Liam.Howlett@oracle.com \
--cc=acme@kernel.org \
--cc=adrian.hunter@intel.com \
--cc=akpm@linux-foundation.org \
--cc=alexander.shishkin@linux.intel.com \
--cc=danielwa@cisco.com \
--cc=david@kernel.org \
--cc=dtominac@cisco.com \
--cc=irogers@google.com \
--cc=james.clark@linaro.org \
--cc=jannh@google.com \
--cc=jolsa@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-perf-users@vger.kernel.org \
--cc=linux-trace-kernel@vger.kernel.org \
--cc=ljs@kernel.org \
--cc=mark.rutland@arm.com \
--cc=mhiramat@kernel.org \
--cc=mingo@redhat.com \
--cc=namhyung@kernel.org \
--cc=peterz@infradead.org \
--cc=vbabka@kernel.org \
--cc=xe-linux-external@cisco.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.