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charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.56.2 (3.56.2-2.fc42) MIME-Version: 1.0 X-Rspam-User: X-Stat-Signature: qwds347w1no8auhthem1ddgwtb9uawya X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: AF17B80018 X-HE-Tag: 1772058391-849392 X-HE-Meta: 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 5E/OwuXP OA7HWxbU+ivxgUpbkjvhcjJx2uUwRxl6LswqeSqqI/22RBxfA0cTbfqPyWfdMe4bdq9D7d7KTEWP0eAHf7Oct0RcZOKnJGGoEzmbqS/sUlrP9OJ7VT6jOFYs2qtJhjqaldWJPpS60foACRVfhvGtpLi/ngbM4dc43Hl+haxMkuDgHWn6cFTAV+0NR+3z5NO9AZRqFtenZ//jKRJMIMBylGJH/aOQWpXL8qxxL Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, 2026-02-25 at 21:36 +0100, Marco Elver wrote: >=20 > +static int __init early_kfence_fault(char *arg) > +{ > + if (!arg) > + return -EINVAL; > + > + if (!strcmp(arg, "report")) > + kfence_fault =3D KFENCE_FAULT_REPORT; > + else if (!strcmp(arg, "oops")) > + kfence_fault =3D KFENCE_FAULT_OOPS; > + else if (!strcmp(arg, "panic")) > + kfence_fault =3D KFENCE_FAULT_PANIC; > + else > + return -EINVAL; > + > + return 0; > +} > +early_param("kfence.fault", early_kfence_fault); The other parameters in mm/kfence/ seem to be module_param, which make them tunable at run time through /sys/module/kfence/parameters/* Why is this one different? And, does this one show up as /sys/module/kfence/parameters/fault? Having the ability to tweak this behavior at run time, without requiring a system reboot, could be really useful for people unexpectedly triggering kernel panics across a fleet of servers, and deciding they would rather not. --=20 All Rights Reversed.