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Date: Fri, 10 Aug 2018 22:10:53 -0400
From: "Theodore Y. Ts'o" <tytso@....edu>
To: sandeen@...hat.com
Cc: Ross Zwisler <ross.zwisler@...ux.intel.com>,
Jan Kara <jack@...e.cz>,
Dan Williams <dan.j.williams@...el.com>,
Dave Chinner <david@...morbit.com>,
"Darrick J. Wong" <darrick.wong@...cle.com>,
Christoph Hellwig <hch@....de>, linux-nvdimm@...ts.01.org,
Jeff Moyer <jmoyer@...hat.com>, linux-ext4@...r.kernel.org,
Lukas Czerner <lczerner@...hat.com>
Subject: Re: [PATCH v4 1/2] dax: dax_layout_busy_page() warn on !exceptional
On Fri, Aug 10, 2018 at 04:33:49PM -0400, Theodore Y. Ts'o wrote:
> I just kicked off a DAX test ("gce-xfstests -c dax -g auto") with
> CONFIG_KASAN disabled, and I expect it shouldn't show up anything
> concerning. So assuming nothing surprising pops up, yes it should be
> merged at the next merge window.
... and here are the results. The first is 4.17, and the second is
the ext4 git tree:
ext4/dax: 488 tests, 4 failures, 97 skipped, 2647 seconds
Failures: ext4/033 generic/344 generic/491 generic/503
ext4/dax: 488 tests, 3 failures, 97 skipped, 2637 seconds
Failures: generic/081 generic/344 generic/388
The generic/388 failure is a known flake (shutdown stress test).
The generic/081 regression appears to be a device-mapper issue:
generic/081 [22:06:33][ 15.079661] run fstests generic/081 at 2018-08-10 22:06:33
[ 15.795745] device-mapper: ioctl: can't change device type (old=4 vs new=1) after initial table load.
[failed, exit status 1] [22:06:36]- output mismatch (see /results/ext4/results-dax/generic/081.out.bad)
--- tests/generic/081.out 2018-08-09 18:00:42.000000000 -0400
+++ /results/ext4/results-dax/generic/081.out.bad 2018-08-10 22:06:36.440005460 -0400
@@ -1,2 +1,4 @@
QA output created by 081
Silence is golden
+Failed to create snapshot
+(see /results/ext4/results-dax/generic/081.full for details)
...
(Run 'diff -u tests/generic/081.out /results/ext4/results-dax/generic/081.out.bad' to see the entire diff)
The generic/344 failure seems to be caused by a WARNING triggered in
the nvdimm code:
generic/344 [22:06:36][ 18.126280] run fstests generic/344 at 2018-08-10 22:06:36
[ 18.303113] EXT4-fs (pmem0): DAX enabled. Warning: EXPERIMENTAL, use at your own risk
[ 18.456988] EXT4-fs (pmem1): DAX enabled. Warning: EXPERIMENTAL, use at your own risk
[ 97.375912] WARNING: CPU: 2 PID: 1712 at /usr/projects/linux/ext4/mm/memory.c:1801 insert_pfn+0x15a/0x170
[ 97.377261] CPU: 2 PID: 1712 Comm: holetest Not tainted 4.18.0-rc4-xfstests-00039-g863c37fcb14f #497
[ 97.378486] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.1-1 04/01/2014
[ 97.379516] RIP: 0010:insert_pfn+0x15a/0x170
[ 97.380064] Code: 19 1b 01 eb dd 48 85 d2 74 07 48 23 1d 3f 19 1b 01 48 09 df 48 89 f8 0f 1f 40 00 48 b9 00 02 00 00 00 00 00 04 48 09 c1 eb c8 <0f> 0b e9 5e ff ff ff bb f4 ff ff ff e9 5e ff ff ff e8 80 7b ec ff
[ 97.382469] RSP: 0000:ffffacfd0457fc60 EFLAGS: 00010206
[ 97.383123] RAX: 0000000000179e3b RBX: 00000000fffffff0 RCX: 0000000000000002
[ 97.384062] RDX: 000fffffffffffff RSI: 8f5c28f5c28f5c29 RDI: 8000000179e3b225
[ 97.385134] RBP: ffff923761654558 R08: 0000000000000001 R09: 0000000000000001
[ 97.386213] R10: ffff92376f415cc0 R11: 0000000000000001 R12: ffff92377e880cc0
[ 97.387264] R13: 00007fab98aab000 R14: 00000000003e860d R15: ffff923761560000
[ 97.388327] FS: 00007fab9049c700(0000) GS:ffff92377f200000(0000) knlGS:0000000000000000
[ 97.389514] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 97.390367] CR2: 00007fab98aabc00 CR3: 00000006a165a004 CR4: 0000000000360ee0
[ 97.391432] Call Trace:
[ 97.391798] __vm_insert_mixed+0x7e/0xc0
[ 97.392376] vmf_insert_mixed_mkwrite+0xf/0x30
[ 97.393048] dax_iomap_pte_fault+0xb8b/0xe40
[ 97.393691] ext4_dax_huge_fault+0x145/0x200
[ 97.394268] do_wp_page+0x175/0x5b0
[ 97.394710] __handle_mm_fault+0x587/0xbb0
[ 97.395228] __do_page_fault+0x20c/0x490
[ 97.395729] ? async_page_fault+0x8/0x30
[ 97.396251] async_page_fault+0x1e/0x30
[ 97.396719] RIP: 0033:0x5598144275ea
[ 97.397187] Code: 0f 85 8a 00 00 00 31 d2 48 85 db 4b 8d 04 34 7e 1f 0f 1f 80 00 00 00 00 48 89 d1 48 83 c2 01 48 0f af 0d 71 1b 20 00 48 39 d3 <48> 89 2c 08 75 e8 8b 0d 36 1b 20 00 31 c0 85 c9 74 0a 8b 15 2e 1b
[ 97.399752] RSP: 002b:00007fab9049bf20 EFLAGS: 00010212
[ 97.400541] RAX: 00007fab90c9ec00 RBX: 0000000000010000 RCX: 0000000007e0d000
[ 97.401603] RDX: 0000000000007e0e RSI: 0000000000000000 RDI: 0000000000000001
[ 97.402673] RBP: 00007fab9049c700 R08: 00007fab9049c700 R09: 00007fab9049c700
[ 97.403755] R10: 00007fab9049c9d0 R11: 0000000000000202 R12: 00007fab90c9e000
[ 97.404851] R13: 00007ffc4608c9e0 R14: 0000000000000c00 R15: 000055981608e250
[ 97.405892] irq event stamp: 1111968
[ 97.406460] hardirqs last enabled at (1111967): [<ffffffffa36c4409>] _raw_spin_unlock_irq+0x29/0x40
[ 97.407826] hardirqs last disabled at (1111968): [<ffffffffa380118f>] error_entry+0x7f/0x100
[ 97.409080] softirqs last enabled at (1111390): [<ffffffffa3a00319>] __do_softirq+0x319/0x4d9
[ 97.410363] softirqs last disabled at (1111383): [<ffffffffa2e8c9e1>] irq_exit+0xc1/0xd0
[ 97.411400] ---[ end trace 69669a34a73c1a49 ]---
[ 117.726077] EXT4-fs (pmem0): DAX enabled. Warning: EXPERIMENTAL, use at your own risk
[ 117.727671] EXT4-fs (pmem0): mounted filesystem with ordered data mode. Opts: acl,user_xattr,block_validity,dax
[ 117.796623] EXT4-fs (pmem1): DAX enabled. Warning: EXPERIMENTAL, use at your own risk
[ 117.798546] EXT4-fs (pmem1): mounted filesystem with ordered data mode. Opts: acl,user_xattr,block_validity,dax
_check_dmesg: something found in dmesg (see /results/ext4/results-dax/generic/344.dmesg)
- Ted
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