A fix for this panic was submitted by kib_at_ as r277922: https://svnweb.freebsd.org/base?view=revision&revision=277922 best Neel On Wed, Jan 28, 2015 at 11:54 AM, Neel Natu <neelnatu_at_gmail.com> wrote: > Hi Gleb, > > On Wed, Jan 28, 2015 at 11:33 AM, Gleb Smirnoff <glebius_at_freebsd.org> wrote: >> On Wed, Jan 28, 2015 at 09:04:42PM +0200, Konstantin Belousov wrote: >> K> > I can't see where integer divide fault can happen with stat_flush_threads=1 :( >> K> >> K> Look at the exact asm instruction which faulted, also look at the registers >> K> content. >> K> >> K> It might be hypervisor bug, after all. >> >> Yes, for me it looks like it. %edx should be one as well as -0x44(%rbp). >> >> 0xffffffff80895d43 <softdep_slowdown+435>: mov -0x20(%rbp),%ecx >> 0xffffffff80895d46 <softdep_slowdown+438>: mov %ecx,%edx >> 0xffffffff80895d48 <softdep_slowdown+440>: shr $0x1f,%edx >> 0xffffffff80895d4b <softdep_slowdown+443>: add %edx,%ecx >> 0xffffffff80895d4d <softdep_slowdown+445>: sar %ecx >> 0xffffffff80895d4f <softdep_slowdown+447>: mov 0xffffffff80ee24c8,%edx >> 0xffffffff80895d56 <softdep_slowdown+454>: mov %rax,-0x40(%rbp) >> 0xffffffff80895d5a <softdep_slowdown+458>: mov %ecx,%eax >> 0xffffffff80895d5c <softdep_slowdown+460>: mov %edx,-0x44(%rbp) >> 0xffffffff80895d5f <softdep_slowdown+463>: cltd >> 0xffffffff80895d60 <softdep_slowdown+464>: mov -0x44(%rbp),%ecx >> 0xffffffff80895d63 <softdep_slowdown+467>: idiv %ecx >> >> (kgdb) p &stat_flush_threads >> $5 = (int *) 0xffffffff80ee24c8 >> (kgdb) info registers >> rax 0x12b86 76678 >> rbx 0x4 4 >> rcx 0x0 0 >> rdx 0x0 0 >> rsi 0x3e8 1000 >> rdi 0x99 153 >> rbp 0xfffffe001eb5f2b0 0xfffffe001eb5f2b0 >> ... >> (kgdb) p *(int *)($rbp - 0x44) >> $4 = 0 >> (kgdb) p *(int *)($rbp - 0x40) >> $8 = 0 >> (kgdb) p &max_softdeps_hard >> $11 = (int *) 0xfffffe001eb5f290 >> (kgdb) p (int *)($rbp - 0x20) >> $12 = (int *) 0xfffffe001eb5f290 >> (kgdb) p max_softdeps_hard >> $10 = 153357 >> > > Can you upload the core file and the kernel someplace that I can access? > > best > Neel > >> -- >> Totus tuus, Glebius. >> _______________________________________________ >> freebsd-current_at_freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-current >> To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org"Received on Tue Feb 10 2015 - 00:33:02 UTC
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