Re: [PATCH] vmalloc: Don't use flush flag when no exec perm

2019-05-30 Thread Edgecombe, Rick P
On Thu, 2019-05-30 at 10:44 +0300, Meelis Roos wrote: > > > The addition of VM_FLUSH_RESET_PERMS for BPF JIT allocations was > > > bisected to prevent boot on an UltraSparc III machine. It was > > > found > > > that > > > sometime shortly after the TLB flush this flag does on vfree of > > > the > >

Re: [PATCH] vmalloc: Don't use flush flag when no exec perm

2019-05-30 Thread Meelis Roos
The addition of VM_FLUSH_RESET_PERMS for BPF JIT allocations was bisected to prevent boot on an UltraSparc III machine. It was found that sometime shortly after the TLB flush this flag does on vfree of the BPF program, the machine hung. Further investigation showed that before any of the changes f

Re: [PATCH] vmalloc: Don't use flush flag when no exec perm

2019-05-29 Thread Edgecombe, Rick P
On Tue, 2019-05-28 at 22:51 -0700, Rick Edgecombe wrote: > The addition of VM_FLUSH_RESET_PERMS for BPF JIT allocations was > bisected to prevent boot on an UltraSparc III machine. It was found > that > sometime shortly after the TLB flush this flag does on vfree of the > BPF > program, the machine

[PATCH] vmalloc: Don't use flush flag when no exec perm

2019-05-28 Thread Rick Edgecombe
The addition of VM_FLUSH_RESET_PERMS for BPF JIT allocations was bisected to prevent boot on an UltraSparc III machine. It was found that sometime shortly after the TLB flush this flag does on vfree of the BPF program, the machine hung. Further investigation showed that before any of the changes fo