reboot -r on mips

[Mori Hiroki]

Hi.

I found some time failed reboot -r. Log is here. 

Jan  1 09:01:04 init: cannot mount tmpfs on /dev/reroot: No space left on device
Jan  1 09:01:04 init: reroot failed; going to single user mode

I checked code. This error come from TMPFS_PAGES_MINRESERVED
cheek in sys/fs/tmpfs/tmpfs_vfsops.c.

Now TMPFS_PAGES_MINRESERVED is 4MByte. This is big because of
my target have only 16MByte or 32Byte memory.

I want change smaller value to TMPFS_PAGES_MINRESERVED.

How to modify code?

Regards

Hiroki Mori

----- Original Message -----
> From: Mori Hiroki <yamori813 at yahoo.co.jp>
> To: Eugene Grosbein <eugen at grosbein.net>; "freebsd-mips at freebsd.org" <freebsd-mips at freebsd.org>
> Cc: 
> Date: 2017/11/29, Wed 20:41
> Subject: Re: reboot -r on mips
> 
> Hi
> 
> I found new method at upgrade. That is use pipe.
> 
> This is upgrade script. This method only use 6MByte md
> any size flash.
> 
> #!/bin/sh
> 
> ZBOARD=`uname -i`
> 
> . /etc/upgrade.conf
> 
> cd /tmp
> mkdir bin
> mkdir sbin
> mkdir libexec
> mkdir dev
> mkdir lib
> mkdir etc
> mkdir -p usr/bin
> cp /sbin/init sbin/
> cp /bin/sh bin/
> cp /bin/dd bin/
> cp /bin/kill bin/
> cp /libexec/ld-elf.so.1 libexec/
> cp /etc/login.conf.db etc/
> cp /usr/bin/tftp usr/bin/
> cp /lib/libedit.so.7 lib/
> cp /lib/libncursesw.so.8 lib/
> cp /lib/libc.so.7 lib/
> mkfifo flashpipe
> 
> kenv vfs.root.mountfrom="ufs:md0"
> 
> #echo ${ZBOARD}.zimage
> 
> echo "#!/bin/sh" > etc/rc
> echo "dd if=/flashpipe of=${UPGRADEDEV} obs=${UPGRADEBS} conv=osync 
> &" >> etc/rc
> echo "echo ¥"bin
> get ${ZBOARD}.zimage /flashpipe
> quit¥" | tftp ${UPGRADETFTP} 69" >> etc/rc
> echo "kill -INT 1" >> etc/rc
> chmod a+x etc/rc
> 
> reboot -r
> 
> Hiroki Mori
> 
> ----- Original Message -----
>>  From: Mori Hiroki <yamori813 at yahoo.co.jp>
>>  To: Eugene Grosbein <eugen at grosbein.net>; 
> "freebsd-mips at freebsd.org" <freebsd-mips at freebsd.org>
>>  Cc: 
>>  Date: 2017/11/28, Tue 16:38
>>  Subject: Re: reboot -r on mips
>> 
>>  Hi
>> 
>>  Thanks for your advice. I missing your mail.
>> 
>>  I use ZRouter build system. This build use md file system at /tmp.
>> 
>>  But small(10M) than 8M flash upgrade. Then I do this way.
>> 
>>  1. nomal boot process
>> 
>>  2. set kenv to prepareupgrade=1
>> 
>>  3. reboot -r
>> 
>>  4. if set prepareupgrade then delete old md and make big(16M) md in rc.
>> 
>>  5. make minimum rootfs in md and save new image by tftp.
>> 
>>  6. reboot -r
>> 
>>  7. image to flash by dd
>> 
>>  8. kill -INT 1
>> 
>>  Thanks again.
>> 
>>  Hiroki Mori
>> 
>>  ----- Original Message -----
>>>   From: Eugene Grosbein <eugen at grosbein.net>
>>>   To: Mori Hiroki <yamori813 at yahoo.co.jp>; 
>>  "freebsd-mips at freebsd.org" <freebsd-mips at freebsd.org>
>>>   Cc: 
>>>   Date: 2017/11/27, Mon 21:17
>>>   Subject: Re: reboot -r on mips
>>> 
>>>   27.11.2017 18:56, Mori Hiroki пишет:
>>>>    Hi.
>>>> 
>>>>    I found reboot -r today. I try this function on my Atheros AR9.
>>> 
>>>   [skip]
>>> 
>>>>    This function make complete flash update method.
>>> 
>>>   Yes, it's great. Also, look at 
>>>   https://lists.freebsd.org/pipermail/freebsd-mips/2016-February/004431.html
>>> 
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