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Re: [Xen-devel] VM System Calls


  • To: "Frederic Beck" <frederic.beck@xxxxxxxx>, keir.fraser@xxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx
  • From: "Swapna Shingre" <amuswaps@xxxxxxxxx>
  • Date: Sun, 28 Dec 2008 11:47:50 +0530
  • Cc:
  • Delivery-date: Sat, 27 Dec 2008 22:18:19 -0800
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  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>

Hello,
I need to disable the fast system call handling in xen.

I commented the two lines in xen/arch/x86/traps.c in do_set_trap_table()

      if(cur.vector==0x80)
          init_int80_direct_trap(curr);

Is this the only change I have to make to disable fast system calls? Because my system is working after I commented those two lines, but I am unable to understand how exactly the system calls work without these two lines. Does it go through do_general_protection fault ?

Please help.

-Swapna
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