git: kern: avoid reading a disk label while dumping

[Aaron LI]

commit d573aa0d431cd13c4880d716771773409e9ab627
Author: David Bidner <david at crap.solutions>
Date:   Sun Oct 4 09:53:57 2026 +0200

    kern: avoid reading a disk label while dumping
    
    Checking an unlabelled dump slice can trigger a disk-label read through
    normal buffered I/O. During a crash dump, that read can wait indefinitely
    before the dump writer reaches its polled I/O path.
    
    Skip the label read while dumping and use the slice bounds already held
    in memory, keeping the normal label probe outside the dump path.
    
    Bug: https://bugs.dragonflybsd.org/issues/3441

Summary of changes:
 sys/kern/subr_diskslice.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/d573aa0d431cd13c4880d716771773409e9ab627


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