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Fri, 13 Nov 2026 11:05:29 +0000 (UTC) Received: from onestero-thinkpadp1gen7.tpbc.csb (headnet04.pony-001.prod.iad2.dc.redhat.com [10.2.32.116]) by mx-prod-int-10.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with SMTP id C94E1341; Fri, 13 Nov 2026 11:05:24 +0000 (UTC) Received: by onestero-thinkpadp1gen7.tpbc.csb (nbSMTP-1.00) for uid 13628 oleg@redhat.com; Fri, 13 Nov 2026 12:05:29 +0100 (CET) Date: Fri, 13 Nov 2026 12:05:23 +0100 From: Oleg Nesterov To: Rosen Penev Cc: Masami Hiramatsu , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , James Clark , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Subject: Re: [PATCH v3] uprobes: Use flexible array for xol_area bitmap Message-ID: References: <20261113052948.2668076-1-rosenp@gmail.com> X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 In-Reply-To: <20261113052948.2668076-1-rosenp@gmail.com> X-Scanned-By: MIMEDefang 3.6 on 10.30.177.95 X-Mimecast-MFC-PROC-ID: p35omSWiQcRmCRwQJXIQ7kn7t9ZD5HO2748m8Ri6i1g_1794567929 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On 11/12, Rosen Penev wrote: > > The XOL slot bitmap has the same lifetime as struct xol_area, but it > is currently allocated separately. That adds another allocation > failure path and a matching cleanup branch without buying any extra > flexibility. > > Store the bitmap as a regular array and allocate it together > with the xol_area. The bitmap remains zero-initialized, while the > allocation and error handling become simpler. > > Signed-off-by: Rosen Penev > Acked-by: Masami Hiramatsu (Google) Acked-by: Oleg Nesterov