[LTP] [RFC PATCH] fallocate05: increase the fallocate and defallocate size

[Li Wang]

On Thu, Sep 23, 2021 at 9:09 PM Cyril Hrubis <chrubis@suse.cz> wrote:

> Hi!
> > Or, another way I can think of, is to cancel the tmpfs size limitation
> > when MemFree is less than the twofold size to be mounted.
>
> This would fail horribly if the machine has all RAM used but there is
> plenty in buffers that should be freed.
>
> I guess that we should really add tst_available_ram() function that
> would print either MemAvailable or sum of MemFree + MemCached. And of
> course we shouldn't eat more than half of that in the tests.
>

Agreed. I would like to put into tst_memutils.h.



>
> > --- a/lib/tst_test.c
> > +++ b/lib/tst_test.c
> > @@ -895,6 +895,9 @@ static const char *limit_tmpfs_mount_size(const char
> > *mnt_data,
> >         if (strcmp(fs_type, "tmpfs"))
> >                 return mnt_data;
> >
> > +       if ((SAFE_READ_MEMINFO("MemFree:") / 1024) < (tdev.size * 2))
> > +               return mnt_data;
>
> I guess that we should as well skip the tmpfs completely if we think
> that the size is too small as well.
>

Just canceling the tmpfs size should work so far, since Ralph said
he got PASS on 20210524-version, which does not include the size
limitation.


-- 
Regards,
Li Wang
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