From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 17 Aug 2018 03:57:19 -0500 (CDT) From: Per Oberg Message-ID: <1128666844.14578797.1534496239671.JavaMail.zimbra@wolfram.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Subject: [Xenomai] Question about kernel warning (Yocto/meta-linux + xenomai homebrew) List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: xenomai Hi there could someone please help me understand what this warning is: [ 2932.508097] ------------[ cut here ]------------ [ 2932.514724] WARNING: CPU: 0 PID: 20645 at /usr/src/kernel/arch/x86/inclu= de/asm/fpu/internal.h:538 fpu__drop+0x19e/0x200 [ 2932.529155] Modules linked in: [ 2932.533513] CPU: 0 PID: 20645 Comm: cat Not tainted 4.9.90-xeno-cobolt #= 1 [ 2932.542067] Hardware name: Hewlett-Packard HP Z620 Workstation/158A, BIO= S J61 v03.65 12/19/2013 [ 2932.552955] I-pipe domain: Linux [ 2932.557675] ffffc90007f37dc8 ffffffff8143da78 0000000000000000 00000000= 00000000 [ 2932.566582] ffffffff81ba4cc0 ffffc90007f37e08 ffffffff810785c1 0000021a= 00000000 [ 2932.576484] 0000000000025dc0 ffff88041a1d5780 0000000000000246 00000000= 00000000 [ 2932.585818] Call Trace: [ 2932.590167] [] dump_stack+0xbf/0xe7 [ 2932.593148] [] __warn+0xe1/0x100 [ 2932.595426] [] warn_slowpath_null+0x1d/0x20 [ 2932.597715] [] fpu__drop+0x19e/0x200 [ 2932.600849] [] exit_thread+0xa5/0xc0 [ 2932.603976] [] do_exit+0x2bd/0xb40 [ 2932.606097] [] ? __do_page_fault+0x285/0x550 [ 2932.608534] [] do_group_exit+0x43/0xb0 [ 2932.610757] [] SyS_exit_group+0x14/0x20 [ 2932.613920] [] do_syscall_64+0x82/0xf0 [ 2932.617071] [] entry_SYSCALL_64_after_swapgs+0x58/0xc= 6 [ 2932.620705] ---[ end trace 8ef0d875e55c5ad1 ]--- At the time of running I was doing=20 > dohell 5& followed by=20 > latency Long story: Xenomai version is 3.0.7, Kernel is 4.9.90-ish The kernel is a x86-64 yocto/meta-intel kernel patched with xenomai patches= . Unfortunately they didn't have their branch merged at Linux 4.9.90 so I h= ad to merge their mainline-linux branch into their project-branch myself, b= ut there were no changes from their part compared to their previous "releas= e-tag" and the merge was mostly ok except for some macros in intel hardware= detection code for different sound chips.=20 Also, patching the xenomai-patches (4.9.90-x86-6 something..) went ok, (ex= cept for som stupid whitespace-stuff in a mmu-function).=20 I will try with another kernel but I was having some troubles with module c= onfiguration since the default does not write any modules to the flash. Regards Per =C3=96berg=20