[Bug 256712] UFS: kernel panic: ffs_blkfree_cg: freeing free frag – in response to pkg-delete(8) soon after login

From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 21 Jun 2021 12:29:02 +0000
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256712

--- Comment #16 from Kirk McKusick <mckusick_at_FreeBSD.org> ---
(In reply to andrew from comment #7)
There are three cases here:
1) failure to properly clean up the filesystem when using journal
2) failure to properly clean up when running in background
3) failure to properly clean up when running synchronous fsck -p during
startup.

I would like to analyse each of these in turn so as to determine which
method(s) are having problems. First I want to test (3); if it fails then the
bug is in fsck_ffs itself. If the problem fails to manifest in (3), then next
is to test (1); if it fails then the bug is in the journaling subsystem.
Finally is to test (2); if it fails then the bug is in the background checking.
So, useful to make forward progress is to test in each of the above ways in the
order (3), (1), then (2).

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Received on Mon Jun 21 2021 - 12:29:02 UTC

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