Re: kern/56329: nvme(4) takes long time to umount

["J. Hannken-Illjes" <hannken%mailbox.org@localhost>]

The following reply was made to PR kern/56329; it has been noted by GNATS.

From: "J. Hannken-Illjes" <hannken%mailbox.org@localhost>
To: NetBSD GNATS <gnats-bugs%netbsd.org@localhost>
Cc: 
Subject: Re: kern/56329: nvme(4) takes long time to umount
Date: Wed, 20 Apr 2022 16:41:50 +0200

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 Finally got a laptop with
     nvme0: SAMSUNG MZVLB256HAHQ-000L7, firmware 0L2QEXD7, serial =
 S41GNB0K593889
 and see unmount times of 10 .. 12 seconds with a DIAGNOSTIC + DEBUG + =
 LOCKDEBUG
 kernel.  All this time is spent in the first vflush().
 
 On a GENERIC kernel without DIAGNOSTIC etc the unmount time goes down to =
 less
 than a second and the disk becomes much faster.
 
 What kind of kernel are/were you using?
 
 --
 J. Hannken-Illjes - hannken%mailbox.org@localhost
 
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