[parisc-linux] TMPFS test?

[Joel Soete]

Hello Max,
>>
>> I backport Randolph 2.6 works to 2.4.23-pre8-pa13 and test tmpfs which
seems
>> to works:
>
>Well, tmpfs works for me since ... 2.4.19 ?!
>
Sorry never heard before (the first time in a Randolph patch :) )

>> # bdf
[...]
>> tmpfs                   128048         0    128048   0% /var/tmp
>
>Okay, this says that you have 128MB allocated for tmpfs.
>This is correct, as tmpfs uses up to half of the physical ram if you
>don't specify the maximum size.
>Well, it doesn't 'allocate' the whole 128MB at once of course, it
>will just use as much as you put into the ram disk.

Clear

>[...]
>>
>> # cat /proc/meminfo
>>         total:    used:    free:  shared: buffers:  cached:
>> Mem:  26224640
>> 86798336 175448064        0  2965504 66297856
>> Swap: 256892928        0 256892928
>> MemTotal:       256100 kB
>> MemFree:        171336 kB
>> MemShared:           0 kB
>> Buffers:          2896 kB
>> Cached:          64744 kB
>> SwapCached:          0 kB
>> Active:          52432 kB
>> Inactive:        19836 kB
>> HighTotal:           0 kB
>> HighFree:            0 kB
>> LowTotal:       256100 kB
>> LowFree:        171336 kB
>> SwapTotal:      250872 kB
>> SwapFree:       250872 kB
>>
>> I just have a question: is it normal that /var/tmp is of about 256Mb when
>
>Mhh, perhaps I'm blind, but where do get the idea that tmpfs is using
>256MB and not (up to) 128MB ?

It comes from another commercial *nix based system which (always confusing
me and) uses /tmp to manage the physical memory + overall swap. [What is
confusing me is its global size (not only the available size as usual with
other fs) which can change as change the usage of swap?]
 
[..]
>As mentioned before (look at usr/src/linux/Documentation/filesystems/tmpfs.txt)

That is where I find how to use it but, my bad, I do not read all details.

Thanks for your help and patience,
    Joel


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