On Thu, 2018-04-26 at 17:14 +0200, Joerg Roedel wrote: > From: Joerg Roedel <jroedel@xxxxxxx> > > This reverts commit 28ee90fe6048fa7b7ceaeb8831c0e4e454a4cf89. > > This commit is broken for x86, as it unmaps the PTE and PMD > pages and immediatly frees them without doing a TLB flush. > > Further this lacks synchronization with other page-tables in > the system when the PMD pages are not shared between > mm_structs. > > On x86-32 with PAE and PTI patches on-top this patch > triggers the BUG_ON in vmalloc_sync_one() because the kernel > and the process page-table were not synchronized. > > Signed-off-by: Joerg Roedel <jroedel@xxxxxxx> I do not agree with the comments and this revert. Let's discuss further on the original thread. Thanks, -Toshi