linux-kernel - [sparc64] Kernel unaligned access at TPC lzo1x_1_do

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Message-ID: <CADxRZqxmvfE9gYoT+1oLV6-o_BbUsay_U45qmMEYL3vErTCCLA@mail.gmail.com>
Date:   Sun, 8 Sep 2019 13:58:08 +0300
From:   Anatoly Pugachev <matorola@...il.com>
To:     Sparc kernel list <sparclinux@...r.kernel.org>
Cc:     Linux Kernel list <linux-kernel@...r.kernel.org>
Subject: [sparc64] Kernel unaligned access at TPC lzo1x_1_do_compress

Hello!

trying to use zram block device, shows the following:

# zramctl -f -s 16g
# cat /sys/block/zram0/comp_algorithm
lzo [lzo-rle] lz4 lz4hc 842 zstd
# zramctl
NAME       ALGORITHM DISKSIZE  DATA COMPR TOTAL STREAMS MOUNTPOINT
/dev/zram0 lzo-rle        16G 10.4M    4K  112K      32

# mkfs.xfs /dev/zram0
...

[   71.095998] zram: Added device: zram0
[   71.765591] zram0: detected capacity change from 0 to 17179869184
[   80.058772] Kernel unaligned access at TPC[8f2534]
lzo1x_1_do_compress+0x1b4/0x820
[   80.073832] Kernel unaligned access at TPC[8f2534]
lzo1x_1_do_compress+0x1b4/0x820
[   80.073866] Kernel unaligned access at TPC[8f2534]
lzo1x_1_do_compress+0x1b4/0x820
[   80.074709] Kernel unaligned access at TPC[8f2534]
lzo1x_1_do_compress+0x1b4/0x820
[   80.074923] Kernel unaligned access at TPC[8f2534]
lzo1x_1_do_compress+0x1b4/0x820


all other tested compression algorithms (lzo, lz4, lz4hc, deflate,
842) work without producing kernel TPC.