On Sun, Nov 28, 2021 at 9:57 PM Fusion Future <qydwhotmail@xxxxxxxxx> wrote: > > On 2021/11/29 00:57, Pasha Tatashin wrote: > > This commit by itself would not cause the freeze or BUG_ON(), but the > > next commit which enables it on x86 arch might. > > Yes, you are right. At the commit > "[1e67abff1820489435aad3fcf258708c21c283ef] x86: mm: add x86_64 support > for page table check" my system starts to experience the freeze. > > I can now reproduce the freeze by following the steps below: > > 1. Open 20 YouTube video pages, and a YouTube Music page. > 2. Play music in the background. (The step can be omitted) > 3. Run `git clone > https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git ln` Thanks, I found a reliable way to reproduce this problem on my workstation: reduce the amount of physical memory to 4G via memmap kernel parameter, and use a script that starts chrome browser with 20 tabs each pointing to a youtube.com page. I will send an update after root cause. > git will never successfully clone the repo because the system will > freeze during the operation. > > I also tried adding `page_table_check=off` to the boot option but still I will add support for page_table_check=off even when CONFIG_PAGE_TABLE_CHECK_ENFORCED is set Thanks, Pasha
