Re: kern/54969 (Disk cache is no longer flushed on shutdown)

["J. Hannken-Illjes" <hannken%eis.cs.tu-bs.de@localhost>]

The following reply was made to PR kern/54969; it has been noted by GNATS.

From: "J. Hannken-Illjes" <hannken%eis.cs.tu-bs.de@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/54969 (Disk cache is no longer flushed on shutdown)
Date: Sun, 2 Aug 2020 10:22:15 +0200

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 On 31. Jul 2020, at 21:38, matthew green <mrg%eterna.com.au@localhost> wrote:
 
 > nice work.  i like how it's fairly simple.
 > 
 > you probably need to care about VMSWAP option.
 
 Already present, without VMSWAP sys/uvm/uvm_swapstub.c gets
 built and it has an empty uvm_swap_shutdown().
 
 > i'd like to see some tests performed where a system is rebooted
 > when it is full of ram and swap -- i fear that this will generate
 > useless IO that may hang.
 
 When swap gets removed all user processes beside the one running
 halt or reboot are gone and all file systems are unmounted.
 
 At this time there should be no data backed by swap.
 
 > also, an option to skip it, maybe just
 > use RB_NOSYNC?
 
 With RB_NOSYNC it is already skipped, vfs_unmountall1() will
 not run in this case.
 
 --
 J. Hannken-Illjes - hannken%eis.cs.tu-bs.de@localhost - TU Braunschweig
 
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