Re: kern/59663 (ffs_snapshot_read -> uvm_fault (or pool page empty) doing dump/restore with snapshot)

["J. Hannken-Illjes via gnats" <gnats-admin%NetBSD.org@localhost>]

The following reply was made to PR kern/59663; it has been noted by GNATS.

From: "J. Hannken-Illjes" <hannken%mailbox.org@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/59663 (ffs_snapshot_read -> uvm_fault (or pool page empty)
 doing dump/restore with snapshot)
Date: Sat, 25 Jul 2026 19:43:44 +0200

 This PR reports two different problems:
 
 1) Memory corruption around (buffer) pools with combination of
    fssconfig and dd.  Bisecting -current this problem got fixed
    with rev. 1.167 of sys/uvm/uvm_km.c on 2026/06/27 09:39:57.
 
    This revision got pulled up to -10 and -11, so for this
    problem the PR should be closed.
 
 2) Deadlock on logout involving vrevoke and vfs_suspend.  This
    problem looks similar to a problem reported on tech-kern@ on
    Sat, 28 Jun 2025, thread starting here:
 
 	https://mail-index.netbsd.org/tech-kern/2025/06/29/msg030580.html
 
    I'm not aware of an open PR for this problem so would propose
    to open a new one with the information/analysis of this PR.
 
 --
 J. Hannken-Illjes - hannken%mailbox.org@localhost