Messages in this thread | | | Date | Tue, 13 May 2003 14:17:07 -0700 | From | William Lee Irwin III <> | Subject | Re: [patch] 2.4 fix to allow vmalloc at interrupt time |
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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.
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