On 07/11/2013 10:46 PM, Andy Lutomirski wrote: > > Sorry I'm late to the party -- I didn't notice this until the lwn > article this week. > > How does this get munmap + mmap right? mremap marks things soft-dirty, > but unmapping and remapping seems like it will result in the soft-dirty > bit being cleared. For that matter, won't this sequence also end up wrong: > > - clear_refs > - Write to mapping > - Page and pte evicted due to memory pressure > - Read from mapping -- clean page faulted back in > - pte soft-dirty is now clear ?!? Yes, it looks like this problem exists. I'll look what can be done about it, thank you. > --Andy Pavel -- 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>