----- Ursprüngliche Mail ----- > Von: "anton ivanov" <anton.iva...@cambridgegreys.com> > An: "linux-um" <linux-um@lists.infradead.org> > CC: "Johannes Berg" <johan...@sipsolutions.net>, "richard" <rich...@nod.at>, > "anton ivanov" > <anton.iva...@cambridgegreys.com> > Gesendet: Donnerstag, 21. September 2023 17:55:22 > Betreff: [PATCH v4] um: Enable preemption in UML
> From: Anton Ivanov <anton.iva...@cambridgegreys.com> > > Preemption requires saving/restoring FPU state. This patch > adds support for it using GCC intrinsics. This patch triggers here the following splat: ------------[ cut here ]------------ WARNING: CPU: 0 PID: 0 at init/main.c:992 start_kernel+0x541/0x6b6 Interrupts were enabled early Modules linked in: CPU: 0 PID: 0 Comm: swapper Not tainted 6.6.0-rc2-ga74d8f8592e5 #128 Stack: 60381b94 00000001 604d3d80 6002b6f6 60444bdd 00000001 604d3e20 6037ecfa 604d3db0 60389b2f 604d3da0 60381b94 Call Trace: [<60381b94>] ? _printk+0x0/0x94 [<600212b1>] show_stack+0x13c/0x14b [<60381b94>] ? _printk+0x0/0x94 [<6002b6f6>] ? um_set_signals+0x0/0x3f [<6037ecfa>] ? sprintf+0x0/0x95 [<60389b2f>] dump_stack_lvl+0x4d/0x5a [<60381b94>] ? _printk+0x0/0x94 [<60389b56>] dump_stack+0x1a/0x1c [<60033ebc>] __warn+0xd9/0x109 [<60033fbd>] warn_slowpath_fmt+0xd1/0xdf [<60033eec>] ? warn_slowpath_fmt+0x0/0xdf [<60381b94>] ? _printk+0x0/0x94 [<60050e2c>] ? __blocking_notifier_chain_register+0x33/0x78 [<60381b94>] ? _printk+0x0/0x94 [<60050e83>] ? blocking_notifier_chain_register+0x12/0x14 [<6005fa92>] ? register_pm_notifier+0x1d/0x1f [<600152c9>] ? random_init+0xc2/0x126 [<60381b94>] ? _printk+0x0/0x94 [<60001c40>] start_kernel+0x541/0x6b6 [<6004deb0>] ? parse_args+0x0/0x2b9 [<6002b609>] ? block_signals+0x0/0x16 [<60003b9d>] start_kernel_proc+0x49/0x4d [<60061863>] ? kmsg_dump_register+0x6d/0x75 [<6001ffdb>] new_thread_handler+0x81/0xb2 [<60003b52>] ? kmsg_dumper_stdout_init+0x1a/0x1c [<60022e52>] uml_finishsetup+0x54/0x59 ---[ end trace 0000000000000000 ]--- x86_64 defconfig + CONFIG_PREEMPT_VOLUNTARY=y Thanks, //richard _______________________________________________ linux-um mailing list linux-um@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-um
