Date: Mon, 03 Dec 2018 16:59:55 +0000 From: bugzilla-noreply@freebsd.org To: ppc@FreeBSD.org Subject: [Bug 233414] [PowerPC64] OPTIONS DEBUG_MEMGUARD results in unbootable kernel Message-ID: <bug-233414-21-7nXCjrRHGL@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-233414-21@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=233414 --- Comment #6 from Leandro Lupori <leandro.lupori@gmail.com> --- (In reply to Leandro Lupori from comment #5) Unfortunately I hit the recursive call to kmem_back_domain() issue again. root@ppcdevref:~ # panic: __rw_wlock_hard: recursing but non-recursive rw kernel vm object @ /usr/src/sys/vm/vm_kern.c:472 cpuid = 70 time = 1543855595 KDB: stack backtrace: 0xe000000173207c10: at .kdb_backtrace+0x5c 0xe000000173207d40: at .vpanic+0x1b4 0xe000000173207e00: at .panic+0x38 0xe000000173207e90: at .__rw_wlock_hard+0x174 0xe000000173207fa0: at ._rw_wlock_cookie+0x110 0xe000000173208040: at .kmem_back_domain+0x134 0xe000000173208130: at .kmem_back_domain+0x438 0xe0000001732081f0: at .kmem_back+0x18 0xe000000173208270: at .memguard_alloc+0x188 0xe000000173208360: at .uma_zalloc_arg+0xe0 0xe000000173208420: at .uma_zalloc_pcpu_arg+0x174 0xe0000001732084c0: at .uma_zfree_arg+0x4c4 0xe000000173208570: at .uma_zfree_pcpu_arg+0xc4 0xe000000173208600: at .uma_zalloc_arg+0x3c0 0xe0000001732086c0: at .moea64_get_unique_vsid+0x2e4 0xe000000173208740: at .moea64_enter+0xac 0xe000000173208840: at .pmap_enter+0xb4 0xe0000001732088f0: at .kmem_back_domain+0x27c 0xe0000001732089e0: at .kmem_malloc_domainset+0xc8 0xe000000173208ad0: at .uma_large_malloc_domain+0xa4 0xe000000173208b60: at .uma_large_malloc+0x1c 0xe000000173208be0: at .malloc+0x134 0xe000000173208c90: at .zfs_kmem_alloc+0x34 0xe000000173208d10: at .zio_buf_alloc+0xec 0xe000000173208db0: at .abd_alloc_linear+0xec 0xe000000173208e50: at .abd_alloc_for_io+0x34 0xe000000173208ed0: at .vdev_queue_io_to_issue+0x8c4 0xe000000173209420: at .vdev_queue_io_done+0x20c 0xe0000001732094f0: at .zio_vdev_io_done+0x12c 0xe000000173209590: at .zio_execute+0x1c4 0xe000000173209670: at .taskq_run_ent+0x30 0xe0000001732096f0: at .taskqueue_poll_is_busy+0x250 0xe0000001732097c0: at .taskqueue_thread_loop+0xac 0xe000000173209850: at .fork_exit+0xd0 0xe0000001732098f0: at .fork_trampoline+0x10 0xe000000173209920: at -0x4 KDB: enter: panic [ thread pid 0 tid 101000 ] Stopped at .kdb_enter+0x60: ld r2, r1, 0x28 db> It is interesting that this time memguard_alloc() was not called twice, but it was called before the first call to kmem_back_domain() returned. Any idea on how to work around this? Maybe force memguard to also guard malloc? -- You are receiving this mail because: You are the assignee for the bug.help
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