On Tue, May 13, 2003 at 02:17:07PM -0700, William Lee Irwin III wrote:
> On Tue, May 13, 2003 at 02:11:12PM -0700, Matthew Jacob wrote:
> > This fixes a buglet wrt doing vmalloc at interrupt time for 2.4.
> > get_vm_area should call kmalloc with GFP_ATOMIC- after all, it's
> > set up to allow for an allocation failure. As best as I read
> > the 2.4 code, the rest of the path through _kmem_cache_alloc
> > should be safe.
>
> Try write_lock_irq(&vmlist_lock)/read_lock_irq(&vmlist_lock) and
> passing in a gfp mask with an alternative API etc. for the interrupt
> time special case. It's deadlockable without at least the locking bits.
>
> But it's worse than that, the implicit smp_call_function() means this
> is stillborn and infeasible period.
Not to mention the page table allocation code...
--
Russell King (rmk@arm.linux.org.uk) The developer of ARM Linux
http://www.arm.linux.org.uk/personal/aboutme.html
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This archive was generated by hypermail 2b29 : Thu May 15 2003 - 22:00:48 EST