linux-ext4 - [Bug 201685] ext4 file system corruption

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Message-ID: <bug-201685-13602-SbewZKpROy@https.bugzilla.kernel.org/>
Date:   Tue, 04 Dec 2018 17:52:01 +0000
From:   bugzilla-daemon@...zilla.kernel.org
To:     linux-ext4@...r.kernel.org
Subject: [Bug 201685] ext4 file system corruption

https://bugzilla.kernel.org/show_bug.cgi?id=201685

--- Comment #224 from Manfred (Manfred.Knick@...nline.de) ---
(In reply to Guenter Roeck from comment #223)

> There is a key difference, though: With 4.18.20, cfq is active.
> 
> $ cat /sys/block/sd*/queue/scheduler
> noop deadline [cfq] 
> noop deadline [cfq] 
> 
> In 4.19, cfq is not available    <--- ?

# grep  -i cfq    config-4.19.3-gentoo

CONFIG_IOSCHED_CFQ=y                       < --- !
# CONFIG_CFQ_GROUP_IOSCHED is not set
CONFIG_DEFAULT_CFQ=y
CONFIG_DEFAULT_IOSCHED="cfq"

did not run me into trouble.

Being a production machine, reverted it to

### INFO:

# uname -a
Linux XXX 4.18.20-gentoo #1 SMP Wed Nov 28 12:30:28 CET 2018 
x86_64 Intel(R) Xeon(R) CPU E3-1276 v3 @ 3.60GHz GenuineIntel GNU/Linux

Running Gentoo "stable" (with *very* few exceptions)

# equery list gcc
[IP-] [  ] sys-devel/gcc-7.3.0-r3:7.3.0

Exploiting disks directly attached @ ASUS Workstation MoBo P9D-WS :
   Samsung SSD,
   multiple S-ATA HDD fom 5000 GB up to 6 TB, ...
as well as e.g. Adaptec SCSI Raid-1, 2 x WD 500

running stable till this evening.

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