Date: Fri, 9 Jun 2023 09:59:58 -0400 From: Alexander Motin <mav@FreeBSD.org> To: Gleb Smirnoff <glebius@freebsd.org>, current@freebsd.org Cc: mm@freebsd.org Subject: Re: panic(s) in ZFS on CURRENT Message-ID: <07c3ec8e-5089-d171-0c8d-1916249f9fd7@FreeBSD.org> In-Reply-To: <ZIKxKOtpI3q8j0mI@FreeBSD.org> References: <ZIKUx4Mhp4yrhd-y@FreeBSD.org> <ZIKxKOtpI3q8j0mI@FreeBSD.org>
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Hi Gleb, There are two probably related PRs upstream: https://github.com/openzfs/zfs/pull/14939 https://github.com/openzfs/zfs/pull/14954 On 09.06.2023 00:57, Gleb Smirnoff wrote: > On Thu, Jun 08, 2023 at 07:56:07PM -0700, Gleb Smirnoff wrote: > T> I'm switching to INVARIANTS kernel right now and will see if that panics earlier. > > This is what I got with INVARIANTS: > > panic: VERIFY3(dev->l2ad_hand <= dev->l2ad_evict) failed (225142071296 <= 225142063104) > > cpuid = 17 > time = 1686286015 > KDB: stack backtrace: > db_trace_self_wrapper() at db_trace_self_wrapper+0x2c/frame 0xfffffe0160dcea90 > kdb_backtrace() at kdb_backtrace+0x46/frame 0xfffffe0160dceb40 > vpanic() at vpanic+0x21f/frame 0xfffffe0160dcebe0 > spl_panic() at spl_panic+0x4d/frame 0xfffffe0160dcec60 > l2arc_write_buffers() at l2arc_write_buffers+0xcda/frame 0xfffffe0160dcedf0 > l2arc_feed_thread() at l2arc_feed_thread+0x547/frame 0xfffffe0160dceec0 > fork_exit() at fork_exit+0x122/frame 0xfffffe0160dcef30 > fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0160dcef30 > --- trap 0, rip = 0, rsp = 0, rbp = 0 --- > Uptime: 1m4s > Dumping 5473 out of 65308 MB:..1%..11%..21%..31%..41%..51%..61%..71%..81%..91% > > (kgdb) frame 4 > #4 0xffffffff804342ea in l2arc_write_buffers (spa=0xfffffe022e942000, dev=0xfffffe023116a000, target_sz=16777216) > at /usr/src/FreeBSD/sys/contrib/openzfs/module/zfs/arc.c:9445 > 9445 ASSERT3U(dev->l2ad_hand, <=, dev->l2ad_evict); > (kgdb) p dev > $1 = (l2arc_dev_t *) 0xfffffe023116a000 > (kgdb) p dev->l2ad_hand > $2 = 225142071296 > (kgdb) p dev->l2ad_evict > $3 = 225142063104 > (kgdb) p *dev > value of type `l2arc_dev_t' requires 66136 bytes, which is more than max-value-size > > Never seen kgdb not being able to print a structure that reported to be too big. > -- Alexander Motin
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