Bug#777702: os-prober seems to hang, but is actually reading entire partition when a partition is not mounted
Package: os-prober
Version: 1.65
Severity: important
Tags: d-i
Dear Maintainer,
I've found that 'update-grub' in jessie which calls 'os-prober', reads what
seems to be the entire partition if it isn't mounted. I've tested this on both
ext3 partitions in LVM and a btrfs partition. I am unsure if this occurs on an
ordinary non-lvm partition.
This would likely break the upgrade for any user upgrading to jessie, as the
read speed I experienced was less than 30GB/h which is close to forever for any
reasonably sized partition.
As a result, grub is not updated and the new kernel with jessie can not be
loaded.
Please feel free to reply at clintonmead@gmail.com if you require any further
details.
Clinton
-- System Information:
Debian Release: 8.0
APT prefers testing
APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 3.16.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages os-prober depends on:
ii libc6 2.19-13
os-prober recommends no packages.
os-prober suggests no packages.
-- no debconf information
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