Date: Mon, 26 Aug 2019 21:17:38 -0700 From: Cy Schubert <Cy.Schubert@cschubert.com> To: Mateusz Guzik <mjguzik@gmail.com> Cc: Cy Schubert <Cy.Schubert@cschubert.com>, src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r351472 - head/sys/fs/nullfs Message-ID: <201908270417.x7R4HcfE024857@slippy.cwsent.com> In-Reply-To: <CAGudoHE=L8MQy=Sb5h04BZvehiSaxmek-kYmEdZ1PpCM2kM24A@mail.gmail.com> References: <201908250513.x7P5DFFx017824@repo.freebsd.org> <6C6BF3A4-DC07-4D9A-9A5F-FA075BF535A8@cschubert.com> <201908261411.x7QEBMWi075354@slippy.cwsent.com> <A961554B-2B0B-4382-BA73-D69FC0129D0B@cschubert.com> <C3B4FE65-FC10-4248-AB00-0E30532C77EB@cschubert.com> <CAGudoHHGLguWZZMh%2BTOCBwANKKp7-6z5JvP1NgRo3jAr4vZ%2BPw@mail.gmail.com> <201908270025.x7R0PtNT008594@slippy.cwsent.com> <CAGudoHHucKGxYKz9L46w-KAhbAKQTXZD6syBPer2aHwh37vx0Q@mail.gmail.com> <201908270341.x7R3fJne062385@slippy.cwsent.com> <CAGudoHE=L8MQy=Sb5h04BZvehiSaxmek-kYmEdZ1PpCM2kM24A@mail.gmail.com>
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In message <CAGudoHE=L8MQy=Sb5h04BZvehiSaxmek-kYmEdZ1PpCM2kM24A@mail.gmail.c om> , Mateusz Guzik writes: > On 8/27/19, Cy Schubert <cy.schubert@gmail.com> wrote: > > Making progress: > > > > Unread portion of the kernel message buffer: > > > > panic: null_unlock: LK_INTERLOCK passed > > cpuid = 2 > > time = 1566868081 > > KDB: stack backtrace: > > db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame > > 0xfffffe0054a954e0 > > vpanic() at vpanic+0x19d/frame 0xfffffe0054a95530 > > panic() at panic+0x43/frame 0xfffffe0054a95590 > > null_unlock() at null_unlock+0x8a/frame 0xfffffe0054a955d0 > > VOP_UNLOCK_APV() at VOP_UNLOCK_APV+0x56/frame 0xfffffe0054a955f0 > > unionfs_unlock() at unionfs_unlock+0x124/frame 0xfffffe0054a95650 > > VOP_UNLOCK_APV() at VOP_UNLOCK_APV+0x56/frame 0xfffffe0054a95670 > > vfs_domount() at vfs_domount+0xc3f/frame 0xfffffe0054a958a0 > > vfs_donmount() at vfs_donmount+0x934/frame 0xfffffe0054a95940 > > sys_nmount() at sys_nmount+0x69/frame 0xfffffe0054a95980 > > amd64_syscall() at amd64_syscall+0x3ae/frame 0xfffffe0054a95ab0 > > fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0054a95ab0 > > --- syscall (378, FreeBSD ELF64, sys_nmount), rip = 0x2bed6a4a, rsp = > > 0x7fffffffe2e8, rbp = 0x7fffffffec70 --- > > Uptime: 1m35s > > > > Ok, this explains everything. I did not think anyone uses unionfs, > let alone stacked on top of nullfs. I'll have a patch later. It's for a few jails. Thanks for persevering. -- Cheers, Cy Schubert <Cy.Schubert@cschubert.com> FreeBSD UNIX: <cy@FreeBSD.org> Web: http://www.FreeBSD.org The need of the many outweighs the greed of the few.
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