From b9185cc4c4c581ff7186b9cd83cb431cd2184fb5 Mon Sep 17 00:00:00 2001
From: David Welch <welch@cwcom.net>
Date: Mon, 21 Jul 2003 21:41:21 +0000
Subject: [PATCH] - Fix for lengthy delays when freeing a memory area. Don't
 attach/detach another process when deleting each page table entry.

svn path=/trunk/; revision=5211
---
 reactos/ntoskrnl/mm/marea.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/reactos/ntoskrnl/mm/marea.c b/reactos/ntoskrnl/mm/marea.c
index f9dd06d739d..27be0448fa2 100644
--- a/reactos/ntoskrnl/mm/marea.c
+++ b/reactos/ntoskrnl/mm/marea.c
@@ -367,6 +367,7 @@ MmFreeMemoryArea(PMADDRESS_SPACE AddressSpace,
 {
    MEMORY_AREA* MemoryArea;
    ULONG i;
+   PEPROCESS CurrentProcess = PsGetCurrentProcess();
    
    DPRINT("MmFreeMemoryArea(AddressSpace %x, BaseAddress %x, Length %x,"
 	   "FreePageContext %d)\n",AddressSpace,BaseAddress,Length,
@@ -379,6 +380,11 @@ MmFreeMemoryArea(PMADDRESS_SPACE AddressSpace,
 	KeBugCheck(0);
 	return(STATUS_UNSUCCESSFUL);
      }
+   if (AddressSpace->Process != NULL && 
+       AddressSpace->Process != CurrentProcess)
+     {
+       KeAttachProcess(AddressSpace->Process);
+     }
    for (i=0; i<(PAGE_ROUND_UP(MemoryArea->Length)/PAGE_SIZE); i++)
      {
        PHYSICAL_ADDRESS PhysAddr = (PHYSICAL_ADDRESS)0LL;
@@ -406,7 +412,11 @@ MmFreeMemoryArea(PMADDRESS_SPACE AddressSpace,
 		    SwapEntry, Dirty);
 	 }
      }
-   
+   if (AddressSpace->Process != NULL &&
+       AddressSpace->Process != CurrentProcess)
+     {
+       KeDetachProcess();
+     }
    RemoveEntryList(&MemoryArea->Entry);
    ExFreePool(MemoryArea);