** Also affects: stress-ng (Ubuntu)
Importance: Undecided
Status: New
** No longer affects: stress-ng
** Changed in: stress-ng (Ubuntu)
Assignee: (unassigned) => Colin Ian King (colin-king)
** Changed in: stress-ng (Ubuntu)
Importance: Undecided => Medium
** Changed in: stress-ng (Ubuntu)
Status: New => In Progress
** Description changed:
== SRU Justification ==
- [IMPISH][HIRSUTE][FOCAL][BIONIC][XENIAL]
+ [IMPISH][HIRSUTE][FOCAL][BIONIC]
[ The issue ]
Turns out the math is incorrect in calculating the offset into a file on
direct I/O writes cause non-block aligned offsets that cause -EINVAL on
writes. This can occur when running non-power of two number of hdd
stressors, e.g. 5 stressors.
[ The fix ]
Upstream fix:
From 9bbe45dfbd5db48c658dd0cf1f28cdb847bcee9c Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.i.k...@gmail.com>
Date: Thu, 11 Nov 2021 13:11:27 +0000
Subject: [PATCH] stress-hdd: ensure offset is aligned to 512 byte boundary
Fix corrects rounds to the 512 byte boundary on offsets.
See: https://github.com/ColinIanKing/stress-ng/issues/158
[ Test plan ]
stress-ng --hdd 5 --hdd-write-size 512 --hdd-bytes 2M --hdd-opts
direct,sync,wr-rnd,rd-rnd --timeout 0 --verbose
Without the fix the test exits early with a invalid write failure error.
With the fix the test will run forever.
[ Where problems could occur ]
This fix only affects the hdd stressor test with random I/O writes AND
direct I/O. The fix aligns the random offset, so in effect the change
won't affect the overall test behaviour except for fixing the offsets so
they are always naturally block aligned. This does mean that the
stressor will do writes that are no longer spanned over multiple blocks
(which is a valid test case), so the test case is less effective, but it
is now at least working for direct I/O cases.
** Also affects: stress-ng (Ubuntu Hirsute)
Importance: Undecided
Status: New
** Also affects: stress-ng (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: stress-ng (Ubuntu Jammy)
Importance: Medium
Assignee: Colin Ian King (colin-king)
Status: In Progress
** Also affects: stress-ng (Ubuntu Impish)
Importance: Undecided
Status: New
** Also affects: stress-ng (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: stress-ng (Ubuntu Jammy)
Status: In Progress => Fix Released
** Changed in: stress-ng (Ubuntu Impish)
Status: New => In Progress
** Changed in: stress-ng (Ubuntu Hirsute)
Status: New => In Progress
** Changed in: stress-ng (Ubuntu Focal)
Status: New => In Progress
** Changed in: stress-ng (Ubuntu Bionic)
Status: New => In Progress
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https://bugs.launchpad.net/bugs/1951152
Title:
Direct I/O with the hdd stressor with random I/O and non power of 2
stressors causes errno -22 EINVAL write errors
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