lkml.org 
[lkml]   [2002]   [May]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectIncorrect Memory Management (Possible Leak)
The following is the result of a system after sitting
idle for 24+ hours following a reboot. Initially
after
the reboot, all memory is reported correctly. After
sitting idle for more than 24 hours, /proc/meminfo
does not account for memory usage. This is mostly a
problem when trying to allocate contiguous DMA'able
pages for a device driver. /proc/meminfo shows:

Total: 255140 Kb
Used: 241620 Kb
Free: 13520 Kb
Shared: 0 Kb
Buffers: 23024 Kb
Cahced: 70192 Kb

Buffers + Cache = 93216 Kb
Buffers + Cache + Free = 106736 Kb (Total Free)

This suggests that an idle system that has not done
a single manual process, (except `free` and `cat`) is
using 148404 Kb. Any thoughts or explanations are
welcome. Thanks.

Machine Setup:
OS: Red Hat 6.2
ARCH: Dual P3 1 GHz 256MB RAM
Kernel: 2.4.18 SMP

# cat /proc/meminfo

total: used: free: shared: buffers:
cached:
Mem: 261263360 235102208 26161152 0 23543808
69218304
Swap: 526376960 716800 525660160
MemTotal: 255140 kB
MemFree: 25548 kB
MemShared: 0 kB
Buffers: 22992 kB
Cached: 67124 kB
SwapCached: 472 kB
Active: 63072 kB
Inactive: 59532 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 255140 kB
LowFree: 25548 kB
SwapTotal: 514040 kB
SwapFree: 513340 kB

# free -t

total used free shared
buffers cached
Mem: 255140 241620 13520 0
23024 70192
-/+ buffers/cache: 148404 106736
Swap: 514040 700 513340
Total: 769180 242320 526860



=====
Shane M. Walton, Software Engineer
Digital System Resources, Inc.
dsrelist@yahoo.com : swalton@dsrnet.com
703.234.1674

__________________________________________________
Do You Yahoo!?
Yahoo! Health - your guide to health and wellness
http://health.yahoo.com
-
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/

\
 
 \ /
  Last update: 2005-03-22 13:25    [W:0.022 / U:8.368 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site