Messages in this thread | | | Subject | Re: 2.0.1: /proc/meminfo wrong | Date | Thu, 4 Jul 1996 15:10:49 +0200 (MET DST) | From | "Carsten Paeth" <> |
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> > I just noticed this same thing at work, I have 16Meg Ram, and it only > says I have 14Meg. What's up??? >
The kernel is using 2Meg :-)
> > ---russ >
> > On Wed, 3 Jul 1996, Ronald Wahl wrote: > > > > > Hi, > > > > Look at the shared field of the following output. How can it be creater > > than my total memory? > > > > rwa@goliath:~$ cat /proc/meminfo > > total: used: free: shared: buffers: cached: > > Mem: 23670784 19726336 3944448 29261824 1191936 6049792 > > Swap: 100843520 53248 100790272 > > MemTotal: 23116 kB > > MemFree: 3852 kB > > MemShared: 28576 kB > > Buffers: 1164 kB > > Cached: 5908 kB > > SwapTotal: 98480 kB > > SwapFree: 98428 kB > >
The output is a little bit confusing, because most people think the meaning of 'shared' is
"how many ram is shared".
but the meaning of 'shared' is:
"how many ram won because of sharing".
The relevant part in the kernel is:
void si_meminfo(struct sysinfo *val) { int i;
i = high_memory >> PAGE_SHIFT; val->totalram = 0; val->sharedram = 0; val->freeram = nr_free_pages << PAGE_SHIFT; val->bufferram = buffermem; while (i-- > 0) { if (PageReserved(mem_map+i)) continue; val->totalram++; if (!mem_map[i].count) continue; val->sharedram += mem_map[i].count-1; ^^^^^^^^^^^^^^^^^^^ } val->totalram <<= PAGE_SHIFT; val->sharedram <<= PAGE_SHIFT; return; }
> > > > ron > > [...]
calle -- calle@calle.in-berlin.de
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