Re: Fixing excessive shootdowns during FFS read (kern/53124) on x86 - emap, direct map

2018-06-12 Thread Eric Hawicz
On 6/10/2018 3:02 PM, Jaromír Doleček wrote: 2018-05-12 21:24 GMT+02:00 Chuck Silvers : the problem with keeping the pages locked (ie. PG_BUSY) while accessing the user address space is that it can lead to deadlock if the page Meanwhile I've tested this scenario - wrote a test program to do mma

Re: Potential new syscall

2018-04-02 Thread Eric Hawicz
On 2018-04-02 07:29 PM, Mouse wrote: Basically, what I want is a syscall that a vfork()ed child can call to have the unsharing effects of execve(2) or _exit(2) (return the vmspace to the parent and let the it continue), while the child carries on with a clone of the vmspace without actually doing