On 03/01/2017 08:43 AM, Dave Hansen wrote: > On 02/28/2017 04:39 PM, Andrew Morton wrote: >> Dumb question: why not do this in userspace, presumably as part of the >> malloc() library? malloc knows where all the memory is and should be >> able to kick off N threads to run around munmapping everything? > > One of the places we saw this happen was when an app crashed and was > exit()'ing under duress without cleaning up nicely. The time that it > takes to unmap a few TB of 4k pages is pretty excessive. Thanks Dave for the answer, I should have put this in the changelog(will do that in the next revision). Sorry about this Andrew, I hope Dave's answer clears things up about the patch's intention.
Regards, Aaron
