From: jbarnes@sgi.com (Jesse Barnes)
To: "Luck, Tony" <tony.luck@intel.com>
Cc: linux-kernel@vger.kernel.org, jamagallon@able.es
Subject: Re: /proc/kcore size
Date: Mon, 12 Jan 2004 10:52:03 -0800 [thread overview]
Message-ID: <20040112185203.GA11768@sgi.com> (raw)
In-Reply-To: <B8E391BBE9FE384DAA4C5C003888BE6F4FB05C@scsmsx401.sc.intel.com>
>From 2.4:
[jbarnes@tomahawk 999-jb.patch]$ cat /proc/meminfo
total: used: free: shared: buffers: cached:
Mem: 32657883136 31249809408 1408073728 0 0 10380558336
Swap: 10485727232 67059712 10418667520
MemTotal: 31892464 kB
MemFree: 1375072 kB
MemShared: 0 kB
Buffers: 0 kB
Cached: 10112928 kB
SwapCached: 24336 kB
Active: 7169808 kB
Inactive: 3035504 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 31892464 kB
LowFree: 1375072 kB
SwapTotal: 10239968 kB
SwapFree: 10174480 kB
HugePages_Total: 0
HugePages_Free: 0
Hugepagesize: 262144 kB
[jbarnes@tomahawk 999-jb.patch]$ ls -l /proc/kcore
-r-------- 1 root root 1909045870592 Jan 12 10:39 /proc/kcore
and from 2.6:
[root@morale root]# cat /proc/meminfo
MemTotal: 7583600 kB
MemFree: 7432864 kB
Buffers: 7952 kB
Cached: 41248 kB
SwapCached: 0 kB
Active: 52592 kB
Inactive: 34736 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 7583600 kB
LowFree: 7432864 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 256 kB
Writeback: 0 kB
Mapped: 33392 kB
Slab: 17376 kB
Committed_AS: 27312 kB
PageTables: 2112 kB
VmallocTotal: 137426709824 kB
VmallocUsed: 128 kB
VmallocChunk: 137426709696 kB
[root@morale root]# ls -l /proc/kcore
-r-------- 1 root root 808460500992 Jan 12 10:51 /proc/kcore
On Mon, Jan 12, 2004 at 10:00:19AM -0800, Luck, Tony wrote:
> > Problem: it detects the memory amount in the box by stat'ing /proc/kcore.
> > Thats not the problem, but that the box has 1Gb of memory, and kcore is just
> > 896Mb big.
>
> It may not be the specific problem that you have now, but it is a
> problem in general. The size of /proc/kcore may be a good
> approximation for the amount of memory on machines that have
> contiguous physical memory starting at a base physical address
> of 0x0, but on an increasing number of machines it may give
> a grossly inflated value (perhaps an SGI Altix user will post
> the output from "ls -l /proc/kcore").
>
> -Tony Luck
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
next prev parent reply other threads:[~2004-01-12 18:52 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-12 18:00 /proc/kcore size Luck, Tony
2004-01-12 18:52 ` Jesse Barnes [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-01-12 9:04 J.A. Magallon
2004-01-12 9:08 ` J.A. Magallon
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20040112185203.GA11768@sgi.com \
--to=jbarnes@sgi.com \
--cc=jamagallon@able.es \
--cc=linux-kernel@vger.kernel.org \
--cc=tony.luck@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.