lock to Direct I/O solves the issue.
[Testcase]
Start an c5.large instance on AWS, and attach a 60gb gp3 volume for
use as a scratch disk.
Run the following script, courtesy of Krister Johansen and his team:
#!/usr/bin/bash
set -euxo pipefail
while true
do
par
lock to Direct I/O solves the issue.
[Testcase]
Start an c5.large instance on AWS, and attach a 60gb gp3 volume for
use as a scratch disk.
Run the following script, courtesy of Krister Johansen and his team:
#!/usr/bin/bash
set -euxo pipefail
while true
do
par
oes not match superblock while trying to open
/dev/nvme1n1p1
Couldn't find valid filesystem superblock.
Changing the read of the superblock to Direct I/O solves the issue.
[Testcase]
Start an c5.large instance on AWS, and attach a 60gb gp3 volume for
use as a scratch disk.
Run the
hile trying to open
/dev/nvme1n1p1
Couldn't find valid filesystem superblock.
Changing the read of the superblock to Direct I/O solves the issue.
[Testcase]
Start an c5.large instance on AWS, and attach a 60gb gp3 volume for
use as a scratch disk.
Run the following script, c
the following script, courtesy of Krister Johansen and his team:
#!/usr/bin/bash
set -euxo pipefail
while true
do
parted /dev/nvme1n1 mklabel gpt mkpart primary 2048s 2099200s
sleep .5
mkfs.ext4 /dev/nvme1n1p1
mount -t ext4
trying to open
/dev/nvme1n1p1
Couldn't find valid filesystem superblock.
Changing the read of the superblock to Direct I/O solves the issue.
[Testcase]
Start an c5.large instance on AWS, and attach a 60gb gp3 volume for
use as a scratch disk.
Run the following script, courtesy
/dev/nvme1n1p1
Couldn't find valid filesystem superblock.
Changing the read of the superblock to Direct I/O solves the issue.
[Testcase]
Start an c5.large instance on AWS, and attach a 60gb gp3 volume for
use as a scratch disk.
Run the following script, courtesy of Krister Joha
Public bug reported:
Hi,
We run ext4 on EBS volumes on EC2. During provisioning, cloud-init will
occasionally report that resize2fs has failed due to a superblock checksum
mismatch. We debugged this internally, and were able to come up with the
following reproducer:
#!/usr/bin/bash
set
Thanks for all the responses. I'm not sure how quickly I'll be able to
get to this either, so I'm hesitant to commit to fixing myself. That
said, if I can get time to send patches before your team gets to fixing
it, I'll do my best.
To answer the question about how frequently we see this: it was
following script, courtesy of Krister Johansen and his team:
#!/usr/bin/bash
set -euxo pipefail
while true
do
parted /dev/nvme1n1 mklabel gpt mkpart primary 2048s 2099200s
sleep .5
mkfs.ext4 /dev/nvme1n1p1
mount -t ext4 /dev/nvme1n1
Public bug reported:
Starting on Noble, we see /boot fail to mount in approximately one out
of every two thousand boots. The error looks like this:
Found device dev-disk-by\x2dlabel-BOOT.device - QEMU NVMe Ctrl BOOT.
Starting systemd-fsck@dev-disk-by… Check on /dev/disk/by-label/BOOT...
orrupted and not containing a valid filesystem,
which would cause boot to fail, and would have a large impact to users.
[Other Info]
Fortunately, the fix here is straight-forward and is similar to what we
did for resize2fs: use O_DIRECT when reading the superblock. We've
alread
ar to what we
did for resize2fs: use O_DIRECT when reading the superblock. We've
already sent a patch upstream and gotten it accepted there:
commit 483c9f38e377ff0b009f546a2c4ee91a1d61588c
From: Krister Johansen
Date: Mon, 18 Nov 2024 12:35:22 -0800
Subject: libblkid: fix spurious ext superblock checksum mismatche
e boot to fail, and would have a large impact to users.
[Other Info]
Fortunately, the fix here is straight-forward and is similar to what we
did for resize2fs: use O_DIRECT when reading the superblock. We've
already sent a patch upstream and gotten it accepted there:
commit 483c9
pted and not containing a valid filesystem,
which would cause boot to fail, and would have a large impact to users.
[Other Info]
Fortunately, the fix here is straight-forward and is similar to what we
did for resize2fs: use O_DIRECT when reading the superblock. We've
already sent a p
clared corrupted and not containing a valid filesystem,
which would cause boot to fail, and would have a large impact to users.
[Other Info]
Fortunately, the fix here is straight-forward and is similar to what we
did for resize2fs: use O_DIRECT when reading the superblock. We've
al
o]
Fortunately, the fix here is straight-forward and is similar to what we
did for resize2fs: use O_DIRECT when reading the superblock. We've
already sent a patch upstream and gotten it accepted there:
commit 483c9f38e377ff0b009f546a2c4ee91a1d61588c
From: Krister
s.
[Other Info]
Fortunately, the fix here is straight-forward and is similar to what we
did for resize2fs: use O_DIRECT when reading the superblock. We've
already sent a patch upstream and gotten it accepted there:
commit 483c9f38e377ff0b009f546a2c4ee91a1d61588c
From: Krister Jo
use the disk to be declared corrupted and not containing a valid filesystem,
which would cause boot to fail, and would have a large impact to users.
[Other Info]
Fortunately, the fix here is straight-forward and is similar to what we
did for resize2fs: use O_DIRECT when reading the superbloc
ght-forward and is similar to what we
did for resize2fs: use O_DIRECT when reading the superblock. We've
already sent a patch upstream and gotten it accepted there:
commit 483c9f38e377ff0b009f546a2c4ee91a1d61588c
From: Krister Johansen
Date: Mo
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