linux-kernel - Re: Linux 4.18-rc7

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Date:   Tue, 31 Jul 2018 20:03:28 +0300
From:   "Kirill A. Shutemov" <kirill@...temov.name>
To:     Linus Torvalds <torvalds@...ux-foundation.org>,
        "Luck, Tony" <tony.luck@...el.com>
Cc:     Amit Pundir <amit.pundir@...aro.org>,
        John Stultz <john.stultz@...aro.org>,
        Hugh Dickins <hughd@...gle.com>,
        Matthew Wilcox <willy@...radead.org>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Oleg Nesterov <oleg@...hat.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-mm <linux-mm@...ck.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        youling 257 <youling257@...il.com>,
        Joel Fernandes <joelaf@...gle.com>,
        Colin Cross <ccross@...gle.com>
Subject: Re: Linux 4.18-rc7

On Tue, Jul 31, 2018 at 09:29:22AM -0700, Linus Torvalds wrote:
> On Mon, Jul 30, 2018 at 11:40 PM Amit Pundir <amit.pundir@...aro.org> wrote:
> >
> > This ashmem change ^^ worked too.
> 
> Ok, let's go for that one and hope it's the only one.
> 
> John, can I get a proper commit message and sign-off for that ashmem change?
> 
> Kirill - you mentioned that somebody reproduced a problem on x86-64
> too. I didn't see that report. Was that some odd x86 Android setup
> with Ashmem too, or is there something else pending?

I've got report from youling privately:

"mm: fix vma_is_anonymous() false-positives" cause my userspace boot failed，
our Androidx86 userspace can running on linux mainline kernel，
revert it boot succeed with 4.18rc7 kernel.

"mm: fix vma_is_anonymous() false-positives" cause these

07-30 11:04:19.556 1609 1609 F DEBUG : pid: 1304, tid: 1304, name: zygote
>>> zygote <<<
07-30 11:04:19.556 1609 1609 F DEBUG : signal 7 (SIGBUS), code 2
(BUS_ADRERR), fault addr 0x7494d008
07-30 11:04:19.556 1609 1609 F DEBUG : eax 00000000 ebx f337bb68 ecx
000001e0 edx 7494d008
07-30 11:04:19.556 1609 1609 F DEBUG : esi 7494d000 edi 00000000
07-30 11:04:19.556 1609 1609 F DEBUG : xcs 00000023 xds 0000002b xes
0000002b xfs 00000003 xss 0000002b
07-30 11:04:19.556 1609 1609 F DEBUG : eip f40f5c76 ebp ffa8d288 esp
ffa8d238 flags 00010202
07-30 11:04:19.581 1609 1609 F DEBUG :

-------------------------------------------------------------------------

The report also had screenshot attached about system info. It's a Baytrail
tablet with LinageOS, so I believe it's the same issue.

But it's not the only issue unfortunately. Tony reported issue with
booting ia64 with the patch. I have no clue why. I rechecked everything
ia64-specific and looks fine to me. :-/

-- 
 Kirill A. Shutemov