On 04/01/2014 02:35 PM, H. Peter Anvin wrote: > On 04/01/2014 02:21 PM, Johannes Weiner wrote: >> Either way, optimistic volatile pointers are nowhere near as >> transparent to the application as the above description suggests, >> which makes this usecase not very interesting, IMO. > > ... however, I think you're still derating the value way too much. The > case of user space doing elastic memory management is more and more > common, and for a lot of those applications it is perfectly reasonable > to either not do system calls or to have to devolatilize first. The SIGBUS is only in cases where the memory is set as volatile and _then_ accessed, right? John, this was something that the Mozilla guys asked for, right? Any idea why this isn't ever a problem for them? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>