!memusage bad list

WINDBG
1

Hi,

On my new laptop running Win 7 the extension !memusage shows a variable numbers of page in bad list; for example the first run reports 288 while the second 725 page frames…

lkd> !memusage
loading PFN database
loading (100% complete)
Compiling memory usage data (99% Complete).
Zeroed: 124855 (499420 kb)
Free: 0 ( 0 kb)
Standby: 266670 (1066680 kb)
Modified: 16529 ( 66116 kb)
ModifiedNoWrite: 0 ( 0 kb)
Active/Valid: 290929 (1163716 kb)
Transition: 5 ( 20 kb)
Bad: 288 ( 1152 kb) <------------
Unknown: 0 ( 0 kb)
TOTAL: 698988 (2795952 kb)
Building kernel map
Finished building kernel map

lkd> !memusageatabase - (27% complete)
loading PFN database
loading (100% complete)
Compiling memory usage data (99% Complete).
Zeroed: 91937 (367748 kb)
Free: 1 ( 4 kb)
Standby: 305926 (1223704 kb)
Modified: 16918 ( 67672 kb)
ModifiedNoWrite: 0 ( 0 kb)
Active/Valid: 283767 (1135068 kb)
Transition: 2 ( 8 kb)
Bad: 725 ( 2900 kb) <--------
Unknown: 0 ( 0 kb)
TOTAL: 698551 (2794204 kb)
Building kernel map
Finished building kernel map
Scanning PFN database - (18% complete)

Why this behaviour ? Thx

2

This is normal. See the discussion in the comments section of this page:

http://analyze-v.com/?p=558

From: xxxxx@alice.itmailto:xxxxx
Sent: ?12/?27/?2012 6:12 AM
To: Kernel Debugging Interest Listmailto:xxxxx
Subject: [windbg] !memusage bad list

Hi,

On my new laptop running Win 7 the extension !memusage shows a variable numbers of page in bad list; for example the first run reports 288 while the second 725 page frames…

lkd> !memusage
loading PFN database
loading (100% complete)
Compiling memory usage data (99% Complete).
Zeroed: 124855 (499420 kb)
Free: 0 ( 0 kb)
Standby: 266670 (1066680 kb)
Modified: 16529 ( 66116 kb)
ModifiedNoWrite: 0 ( 0 kb)
Active/Valid: 290929 (1163716 kb)
Transition: 5 ( 20 kb)
Bad: 288 ( 1152 kb) <------------
Unknown: 0 ( 0 kb)
TOTAL: 698988 (2795952 kb)
Building kernel map
Finished building kernel map

lkd> !memusageatabase - (27% complete)
loading PFN database
loading (100% complete)
Compiling memory usage data (99% Complete).
Zeroed: 91937 (367748 kb)
Free: 1 ( 4 kb)
Standby: 305926 (1223704 kb)
Modified: 16918 ( 67672 kb)
ModifiedNoWrite: 0 ( 0 kb)
Active/Valid: 283767 (1135068 kb)
Transition: 2 ( 8 kb)
Bad: 725 ( 2900 kb) <--------
Unknown: 0 ( 0 kb)
TOTAL: 698551 (2794204 kb)
Building kernel map
Finished building kernel map
Scanning PFN database - (18% complete)

Why this behaviour ? Thx

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