[Vm-dev] Cog issue? Re: [Pharo-project] StandardFileStream size limit?

Bert Freudenberg bert at freudenbergs.de
Thu Jun 14 09:17:40 UTC 2012


On 2012-06-14, at 00:09, David T. Lewis wrote:

> 
> On Wed, Jun 13, 2012 at 03:00:29PM -0700, Eliot Miranda wrote:
>> 
>> On Wed, Jun 13, 2012 at 7:40 AM, David T. Lewis <lewis at mail.msen.com> wrote:
>> 
>>> 
>>> On Wed, Jun 13, 2012 at 04:08:14PM +0200, G?ran Krampe wrote:
>>>> 
>>>> Hey!
>>>> 
>>>> Ok, so the plot thickens:
>>>> 
>>>> If I run this in a "oneclick 1.4" I will get a file write error on 2Gb:
>>>> 
>>>> | f b |
>>>> f := StandardFileStream newFileNamed: 'test'.
>>>> b := ByteArray new: 1024*1024*100. "100Mb"
>>>> [30 timesRepeat: [f nextPutAll: b]] ensure: [f close] "3Gb"
>>>> 
>>>> 
>>>> ...but it worked fine using a self built "standard" VM from squeakvm.org
>>>> (4.4.7.2357)! Same image btw.
>>>> 
>>>> Now, does it work with the bleeding edge Cog? Tried r2556 and nope, same
>>>> problem.
>>>> 
>>>> So I "guess" it is a Cog thing? I haven't tried building Cog from source.
>>>> 
>>>> regards, G?ran
>>> 
>>> Background on large file support, see especially Bert's summary:
>>> 
>>> 
>>> http://forum.world.st/Re-squeak-dev-filesize-reporting-0-for-very-large-files-td4483646.html
>>> http://bugs.squeak.org/view.php?id=7522
>>> http://www.suse.de/~aj/linux_lfs.html
>>> 
>>> I'm not sure if the Cog VMs are being compiled with the the LFS option,
>>> although
>>> I expect that if you compile it yourself with the build options that Bert
>>> explains,
>>> then it should start working.
>>> 
>> 
>> I just committed the necessary changes for my branch.  Will rebuild soon.
>> G?ran, if you're in a hurry build your own?  You'd need to be in
>> http://www.squeakvm.org/svn/squeak/branches/Cog/unixbuild/bld and run ./mvm.
>> -- 
>> best,
>> Eliot
> 
> Excellent :)
> 
> Dave

I wonder why the interpreter VM works though - I didn't see any of those flags in its build settings. Or maybe some Linuxes enable large files by default?

- Bert -




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