Re: [casper] An error occurs when 'exportfs -a' is entered

2022-06-09 Thread David Harold Edward MacMahon
For one or even a small number of ROACH2s, there probably isn't much advantage 
to netboot.  As the number of boards in the system increases, netboot helps 
because everything runs the same version always.  Also, with the kernel and 
root filesystem on an SSD, netboot is less prone to failure/corruption.  Maybe 
things are better now, but it used to be that if the ROACH2 linux crashed then 
the soloboot root filesystem could get corrupted.

HTH,
Dave

> On Jun 9, 2022, at 03:11, Michael D'Cruze 
>  wrote:
> 
> Hello,
> 
> I think nfs/netboot made sense when filesystem updates were being released 
> for R2, but I don't really understand why anyone would use it anymore. Roach2 
> should soloboot by default, and unless you've compiled and are running a 
> custom filesystem for some reason I'm not sure why any other boot method 
> would be advantageous... Perhaps I'm missing something
> 
> Best,
> Michael
> From: casper@lists.berkeley.edu  on behalf of 王钊 
> 
> Sent: 09 June 2022 09:45
> To: casper@lists.berkeley.edu 
> Subject: Re: [casper] An error occurs when 'exportfs -a' is entered
>  
> Hi Michael,
> 
> I'm using ROACH2.I don't know much about other boot methods of ROACH2. My 
> tutor suggests that I use Netboot.
> 
> I spent a lot of time on netboot, the first time I used Ubuntu16, and this 
> error occurred at netboot:
> <154620_8cc3a188_10952828.webp>
>  
> I am currently trying to use Ubuntu14 for netboot and also getting an error 
> about exportfs -a.
> 
> I have also considered trying other boot methods, are there any related 
> tutorials?All I can find is netboot.
> 
> Thank you very much for your reply!
> Wang
> Michael D'Cruze  > 于2022年6月8日周三 23:12写道:
> Hi Wang,
> 
> 😬
> I did use netboot for a while on my roach2 way back in the day, but it was 
> easier especially following various updates to the board to just use soloboot.
> I hate to ask but is there a reason you need to use netboot?
> I assume you're using a roach2, and not a roach1?
> 
> BW
> Michael
> From: casper@lists.berkeley.edu  
> mailto:casper@lists.berkeley.edu>> on behalf of 
> Wang mailto:sandang19990...@gmail.com>>
> Sent: 08 June 2022 15:52
> To: casper@lists.berkeley.edu  
> mailto:casper@lists.berkeley.edu>>
> Subject: [casper] An error occurs when 'exportfs -a' is entered
>  
> Hi CASPER,
>   How's it going? I'm using ubuntu14.04.
>   I had some problems setting up the ROACH netboot.
> First, sudo apt-get install nfs-kernel-server nfs-common.
> Second, sudo gedit /etc/exports,and add the lines:
># Share 'roach_boot' directory/srv/roach_boot   
> 192.168.100.0/24(rw,subtree_check,no_root_squash,insecure) 
> 
> The last, exportfs -a
>  At this time, the terminal displays:
> sandang@wz-sandang:/etc$ sudo exportfs -a
> exportfs: No options for to NFS: suggest NFS(sync) to avoid warning 
> exportfs: /etc/exports [1]: Neither 'subtree_check' or 'no_subtree_check' 
> specified for
> export "NFS:to".
> Assuming default behaviour ('no_subtree_check').
> NOTE: this default has changed since nfs-utils version 1.0.x 
> 
>  May I ask what are the reasons for these?
>  I would be really appreciated if you reply!  
> Wang
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Re: [casper] Fix - Simulink R2021a crashes on startup on Ubuntu 18.04

2022-06-09 Thread Adam Isaacson
Well done, Morag and team! That is a great catch and very helpful to me and
others!

Kind regards,

Adam

On Thu, Jun 9, 2022 at 2:43 PM Morag Brown  wrote:

> Hey all,
>
> I had a quick look in the mail archive and didn't see anything on this,
> but it's not impossible others will come across/have come across the same
> issue I've encountered, so figured I'd potentially save some people future
> frustrations and heart attacks.
>
> There's an issue with later versions of Matlab (R2021a and up) on older
> versions of Ubuntu (18.04 and down) where opening Simulink intermittently
> causes Matlab to crash with some variation of the following error:
>
> *Inconsistency detected by ld.so: ../elf/dl-tls.c: 517:
> _dl_allocate_tls_init: Assertion `listp != NULL' failed!*
>
> This is due to a bug in the glibc library present on older versions of
> Linux distros that doesn't play nicely with the new way Matlab does some
> things. Fortunately, Mathworks doth provide an answer. Not so fortunately,
> their official answer is "upgrade to a newer operating system with a
> version of glibc that doesn't have this bug". Lol.
>
> But they also kindly provide a solution
>  for those of us
> who can't just upgrade; an unofficial patch of the glibc libraries that
> fixes this bug for various OS versions. This of course comes with the major
> caveat that modifying system files is done at your own risk - all processes
> in the OS share glibc, so the patch will affect your whole system, not just
> Matlab, and this could cause weirdness.
>
> So if you find yourself in the same position I was yesterday, wondering if
> you should risk it all just for Simulink - I'm happy to report that I
> applied this patch, the universe did not end and nothing on my machine
> *seems* to be broken. Great success.
>
> That is all,
> Morag
>
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> .
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[casper] Fix - Simulink R2021a crashes on startup on Ubuntu 18.04

2022-06-09 Thread Morag Brown
Hey all,

I had a quick look in the mail archive and didn't see anything on this, but
it's not impossible others will come across/have come across the same issue
I've encountered, so figured I'd potentially save some people future
frustrations and heart attacks.

There's an issue with later versions of Matlab (R2021a and up) on older
versions of Ubuntu (18.04 and down) where opening Simulink intermittently
causes Matlab to crash with some variation of the following error:

*Inconsistency detected by ld.so: ../elf/dl-tls.c: 517:
_dl_allocate_tls_init: Assertion `listp != NULL' failed!*

This is due to a bug in the glibc library present on older versions of
Linux distros that doesn't play nicely with the new way Matlab does some
things. Fortunately, Mathworks doth provide an answer. Not so fortunately,
their official answer is "upgrade to a newer operating system with a
version of glibc that doesn't have this bug". Lol.

But they also kindly provide a solution
 for those of us
who can't just upgrade; an unofficial patch of the glibc libraries that
fixes this bug for various OS versions. This of course comes with the major
caveat that modifying system files is done at your own risk - all processes
in the OS share glibc, so the patch will affect your whole system, not just
Matlab, and this could cause weirdness.

So if you find yourself in the same position I was yesterday, wondering if
you should risk it all just for Simulink - I'm happy to report that I
applied this patch, the universe did not end and nothing on my machine
*seems* to be broken. Great success.

That is all,
Morag

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Re: [casper] An error occurs when 'exportfs -a' is entered

2022-06-09 Thread 王钊
Hi,

Thank you for your reply. I am a novice in this field, and I do not quite
understand what you said. I will analyze and study this issue again.

Best
Wang

Michael D'Cruze  于 2022年6月9日周四
下午6:11写道:

> Hello,
>
> I think nfs/netboot made sense when filesystem updates were being released
> for R2, but I don't really understand why anyone would use it anymore.
> Roach2 should soloboot by default, and unless you've compiled and are
> running a custom filesystem for some reason I'm not sure why any other boot
> method would be advantageous... Perhaps I'm missing something
>
> Best,
> Michael
> --
> *From:* casper@lists.berkeley.edu  on behalf
> of 王钊 
> *Sent:* 09 June 2022 09:45
> *To:* casper@lists.berkeley.edu 
> *Subject:* Re: [casper] An error occurs when 'exportfs -a' is entered
>
> Hi Michael,
>
> I'm using ROACH2.I don't know much about other boot methods of ROACH2. My
> tutor suggests that I use Netboot.
>
> I spent a lot of time on netboot, the first time I used Ubuntu16, and this
> error occurred at netboot:
> [image: 154620_8cc3a188_10952828.webp]
>
> I am currently trying to use Ubuntu14 for netboot and also getting an
> error about exportfs -a.
>
> I have also considered trying other boot methods, are there any related
> tutorials?All I can find is netboot.
>
> Thank you very much for your reply!
> Wang
> Michael D'Cruze  于2022年6月8日周三
> 23:12写道:
>
> Hi Wang,
>
> 😬
> I did use netboot for a while on my roach2 way back in the day, but it was
> easier especially following various updates to the board to just use
> soloboot.
> I hate to ask but is there a reason you need to use netboot?
> I assume you're using a roach2, and not a roach1?
>
> BW
> Michael
> --
> *From:* casper@lists.berkeley.edu  on behalf
> of Wang 
> *Sent:* 08 June 2022 15:52
> *To:* casper@lists.berkeley.edu 
> *Subject:* [casper] An error occurs when 'exportfs -a' is entered
>
> Hi CASPER,
>   How's it going? I'm using ubuntu14.04.
>   I had some problems setting up the ROACH netboot.
>
>- First, sudo apt-get install nfs-kernel-server nfs-common.
>- Second, sudo gedit /etc/exports,and add the lines:
>
># Share 'roach_boot' directory/srv/roach_boot
> 192.168.100.0/24(rw,subtree_check,no_root_squash,insecure)
>
>- The last, exportfs -a
>-  At this time, the terminal displays:
>
> sandang@wz-sandang:/etc$ sudo exportfs -a
> exportfs: No options for to NFS: suggest NFS(sync) to avoid warning
> exportfs: /etc/exports [1]: Neither 'subtree_check' or 'no_subtree_check'
> specified for
> export "NFS:to".
> Assuming default behaviour ('no_subtree_check').
> NOTE: this default has changed since nfs-utils version 1.0.x
>
>  May I ask what are the reasons for these?
>  I would be really appreciated if you reply!
> Wang
>
> --
> You received this message because you are subscribed to the Google Groups "
> casper@lists.berkeley.edu" group.
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> 
> .
>
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> 
> .
>
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Re: [casper] An error occurs when 'exportfs -a' is entered

2022-06-09 Thread Michael D'Cruze
Hello,

I think nfs/netboot made sense when filesystem updates were being released for 
R2, but I don't really understand why anyone would use it anymore. Roach2 
should soloboot by default, and unless you've compiled and are running a custom 
filesystem for some reason I'm not sure why any other boot method would be 
advantageous... Perhaps I'm missing something

Best,
Michael

From: casper@lists.berkeley.edu  on behalf of 王钊 

Sent: 09 June 2022 09:45
To: casper@lists.berkeley.edu 
Subject: Re: [casper] An error occurs when 'exportfs -a' is entered

Hi Michael,

I'm using ROACH2.I don't know much about other boot methods of ROACH2. My tutor 
suggests that I use Netboot.

I spent a lot of time on netboot, the first time I used Ubuntu16, and this 
error occurred at netboot:
[154620_8cc3a188_10952828.webp]

I am currently trying to use Ubuntu14 for netboot and also getting an error 
about exportfs -a.

I have also considered trying other boot methods, are there any related 
tutorials?All I can find is netboot.

Thank you very much for your reply!
Wang
Michael D'Cruze 
mailto:michael.dcr...@postgrad.manchester.ac.uk>>
 于2022年6月8日周三 23:12写道:
Hi Wang,

😬
I did use netboot for a while on my roach2 way back in the day, but it was 
easier especially following various updates to the board to just use soloboot.
I hate to ask but is there a reason you need to use netboot?
I assume you're using a roach2, and not a roach1?

BW
Michael

From: casper@lists.berkeley.edu 
mailto:casper@lists.berkeley.edu>> on behalf of Wang 
mailto:sandang19990...@gmail.com>>
Sent: 08 June 2022 15:52
To: casper@lists.berkeley.edu 
mailto:casper@lists.berkeley.edu>>
Subject: [casper] An error occurs when 'exportfs -a' is entered

Hi CASPER,
  How's it going? I'm using ubuntu14.04.
  I had some problems setting up the ROACH netboot.

  *   First, sudo apt-get install nfs-kernel-server nfs-common.
  *   Second, sudo gedit /etc/exports,and add the lines:

   # Share 'roach_boot' directory/srv/roach_boot   
192.168.100.0/24(rw,subtree_check,no_root_squash,insecure)

  *   The last, exportfs -a
  *At this time, the terminal displays:

sandang@wz-sandang:/etc$ sudo exportfs -a
exportfs: No options for to NFS: suggest NFS(sync) to avoid warning
exportfs: /etc/exports [1]: Neither 'subtree_check' or 'no_subtree_check' 
specified for
export "NFS:to".
Assuming default behaviour ('no_subtree_check').
NOTE: this default has changed since nfs-utils version 1.0.x

 May I ask what are the reasons for these?
 I would be really appreciated if you reply!
Wang

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Re: [casper] An error occurs when 'exportfs -a' is entered

2022-06-09 Thread Wang
Hi Marc,

[image: rpcinfo-p.png]
Thank you very much !
BW
Wang
在2022年6月9日星期四 UTC+8 17:14:47 写道:

>
>
> Hi
>
> It could be that NFS isn't registered with the portmapper, or the 
> portmapper isn't running. 
>
> $ rpcinfo -p localhost
>
> should normally print a list of services available. If they are not, 
> investigate your startup routines to make sure that portmapper, nfsd and 
> related services are actually being launched.
>
> regards
>
> marc
>
> On Thu, Jun 9, 2022 at 8:52 AM 王钊  wrote:
>
>> Hi Marc,
>> [image: error.png]
>>
>> Thanks for your reply.
>> Wang
>>
>> Marc  于2022年6月8日周三 23:14写道:
>>
>>> Hello
>>>
>>> > sandang@wz-sandang:/etc$ sudo exportfs -a
>>> > exportfs: No options for to NFS: suggest NFS(sync) to avoid warning
>>> > exportfs: /etc/exports [1]: Neither 'subtree_check' or 
>>> 'no_subtree_check' specified for
>>> > export "NFS:to".
>>> > Assuming default behaviour ('no_subtree_check').
>>> > NOTE: this default has changed since nfs-utils version 1.0.x
>>>
>>> What does
>>>
>>>   $ sudo showmount -e
>>>
>>> say ? If there is nothing exported there might be some syntax error in
>>> the config file. I know some editors add usual unicode space
>>> characters to the files they write, which might not be something that
>>> config file parser knows about
>>>
>>> regards
>>>
>>> marc
>>>
>>> -- 
>>> https://katfs.kat.ac.za/~marc/
>>>
>>> -- 
>>> You received this message because you are subscribed to the Google 
>>> Groups "cas...@lists.berkeley.edu" group.
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>>> an email to casper+un...@lists.berkeley.edu.
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>>> https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CAGrhWaQ91i7hKNNKbVu1DsydTaNXgpQuiO%2BZsvGkS8AibbmT1Q%40mail.gmail.com
>>> .
>>>
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>> 
>> .
>>
>
>
> -- 
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>

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Re: [casper] An error occurs when 'exportfs -a' is entered

2022-06-09 Thread 王钊
Hi Michael,

I'm using ROACH2.I don't know much about other boot methods of ROACH2. My
tutor suggests that I use Netboot.

I spent a lot of time on netboot, the first time I used Ubuntu16, and this
error occurred at netboot:
[image: 154620_8cc3a188_10952828.webp]

I am currently trying to use Ubuntu14 for netboot and also getting an error
about exportfs -a.

I have also considered trying other boot methods, are there any related
tutorials?All I can find is netboot.

Thank you very much for your reply!
Wang
Michael D'Cruze  于2022年6月8日周三
23:12写道:

> Hi Wang,
>
> 😬
> I did use netboot for a while on my roach2 way back in the day, but it was
> easier especially following various updates to the board to just use
> soloboot.
> I hate to ask but is there a reason you need to use netboot?
> I assume you're using a roach2, and not a roach1?
>
> BW
> Michael
> --
> *From:* casper@lists.berkeley.edu  on behalf
> of Wang 
> *Sent:* 08 June 2022 15:52
> *To:* casper@lists.berkeley.edu 
> *Subject:* [casper] An error occurs when 'exportfs -a' is entered
>
> Hi CASPER,
>   How's it going? I'm using ubuntu14.04.
>   I had some problems setting up the ROACH netboot.
>
>- First, sudo apt-get install nfs-kernel-server nfs-common.
>- Second, sudo gedit /etc/exports,and add the lines:
>
># Share 'roach_boot' directory/srv/roach_boot
> 192.168.100.0/24(rw,subtree_check,no_root_squash,insecure)
>
>- The last, exportfs -a
>-  At this time, the terminal displays:
>
> sandang@wz-sandang:/etc$ sudo exportfs -a
> exportfs: No options for to NFS: suggest NFS(sync) to avoid warning
> exportfs: /etc/exports [1]: Neither 'subtree_check' or 'no_subtree_check'
> specified for
> export "NFS:to".
> Assuming default behaviour ('no_subtree_check').
> NOTE: this default has changed since nfs-utils version 1.0.x
>
>  May I ask what are the reasons for these?
>  I would be really appreciated if you reply!
> Wang
>
> --
> You received this message because you are subscribed to the Google Groups "
> casper@lists.berkeley.edu" group.
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> email to casper+unsubscr...@lists.berkeley.edu.
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> 
> .
>
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