Re: kern/52239: Changing protections of already mmap'ed region can fail

[christos%zoulas.com@localhost (Christos Zoulas)]

The following reply was made to PR kern/52239; it has been noted by GNATS.

From: christos%zoulas.com@localhost (Christos Zoulas)
To: gnats-bugs%NetBSD.org@localhost, kern-bug-people%netbsd.org@localhost, 
	gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost
Cc: chuq%netbsd.org@localhost
Subject: Re: kern/52239: Changing protections of already mmap'ed region can fail
Date: Wed, 17 May 2017 22:32:17 -0400

 On May 17,  5:25pm, gson%gson.org@localhost (Andreas Gustafsson) wrote:
 -- Subject: kern/52239: Changing protections of already mmap'ed region can fa
 
 This seems to fix it, but I am not sure if it is correct. But that does not
 explain why it fails in the first place since there is plenty of memory
 around. Chuq?
 
 christos
 
 Index: uvm_mmap.c
 ===================================================================
 RCS file: /cvsroot/src/sys/uvm/uvm_mmap.c,v
 retrieving revision 1.164
 diff -u -u -r1.164 uvm_mmap.c
 --- uvm_mmap.c	6 May 2017 21:34:52 -0000	1.164
 +++ uvm_mmap.c	18 May 2017 02:28:52 -0000
 @@ -909,7 +909,7 @@
  {
  	vaddr_t align = 0;
  	int error;
 -	uvm_flag_t uvmflag = 0;
 +	uvm_flag_t uvmflag = UVM_FLAG_WAITVA;
  
  	/*
  	 * check params