On Fri, Aug 04, 2017 at 03:07:28PM -0400, riel@xxxxxxxxxx wrote: > [resend because half the recipients got dropped due to IPv6 firewall issues] > > Introduce MADV_WIPEONFORK semantics, which result in a VMA being > empty in the child process after fork. This differs from MADV_DONTFORK > in one important way. > > If a child process accesses memory that was MADV_WIPEONFORK, it > will get zeroes. The address ranges are still valid, they are just empty. I feel like we are repeating mistake we made with MADV_DONTNEED. MADV_WIPEONFORK would require a specific action from kernel, ignoring the /advise/ would likely lead to application misbehaviour. Is it something we really want to see from madvise()? -- Kirill A. Shutemov -- 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>
