- #NO MEMORY LEAK SHOWING IN POOLMON.EXE FOR NON PAGED POOL HOW TO#
- #NO MEMORY LEAK SHOWING IN POOLMON.EXE FOR NON PAGED POOL DRIVERS#
- #NO MEMORY LEAK SHOWING IN POOLMON.EXE FOR NON PAGED POOL FREE#
#NO MEMORY LEAK SHOWING IN POOLMON.EXE FOR NON PAGED POOL DRIVERS#
We can see every option apart from Force pending I/O requests and Low resource simulation are enabled as these options create unrealistic environments for drivers that can cause them to crash when in reality the drivers might not crash at all so this creates false positive reports.įor more information on Driver Verifier options look here:ĭriver Verifier Options (Windows Drivers) (0x00000004) Randomized low resources simulation
The 2 extension is used to display the amount of nonpaged pool usage, 4 would show page pool. Lets look at all the processes that are using the Nonpaged memory pools.ĭo note the list is very long and it is ordered in size of memory usage so only the top few lines are of use. PagedPool Maximum: 33554432 ( 134217728 Kb)Īlthough we can see the PagedPool usage that isn't normally the cause of crashes due to memory leakage as it can be paged out to disk, it's non paged pool leakage caused by device drivers that cause these issues.
#NO MEMORY LEAK SHOWING IN POOLMON.EXE FOR NON PAGED POOL FREE#
I'll show an example as I found a 0xF4 Kernel dump file but it isn't the cause of a memory leak though.Ĭurrent: 16703440 Kb Free Space: 16703436 Kb You can start with using the !poolused 2.
#NO MEMORY LEAK SHOWING IN POOLMON.EXE FOR NON PAGED POOL HOW TO#
How to use Memory Pool Monitor (Poolmon.exe) to troubleshoot kernel mode memory leaksĪnother way is a Kernel Debugger which is my personal favourite way, you will need Kernel memory dumps to find pool leaks. It sorts all memory used on the system into different categories of your choice such as Paged and Nonpaged pools.įor more information on the Pool Monitor look here: To determine whether or not you have a memory leakage you can use different programs, the Pool Monitor is one of them. It's caused by programs not freeing there pages of memory after they've finished using them so the pages are no longer in use by the application but they can't be used by anything else as they haven't been freed. Secondly, severe memory leakage can cause this problem as it can drain all the systems resources, normally non paged memory pools so the system cannot function and crashes. Well when drive cannot perform basic operations such as read and write Windows cannot perform basic routines so the system fails resulting in a crash, this is usually the cause of a failing disk. Now is mainly caused by disk I/O errors, so what is a disk I/O error? This results in the Windows Subsystem (implemented within csrss.exe) being marked as a critical process even on servers where display I/O isn't needed so if its exited for any reason the system must bugcheck.
The process that crashed is csrss.exe (Client/Server Runtime Subsystem) which is the Windows Subsystem, although Windows was designed to support multiple subsystems, calling each subsystem to perform functions such as display I/O would result in duplicate functions which would inevitably reduce performance, therefore designers put a lot of basic functions within this primary subsystem to improve performance. SessionId: none Cid: 0174 Peb: 7fffffda000 ParentCid: 0154ĭirBase: 321389000 ObjectTable: fffff8a00b4f9840 HandleCount: GetPointerFromAddress: unable to read from fffff80003515000