Re: kernel BUG at mm/shmem.c:LINE!

2018-07-26 Thread Matthew Wilcox
On Thu, Jul 26, 2018 at 09:40:20AM -0700, Hugh Dickins wrote: > On Thu, 26 Jul 2018, Matthew Wilcox wrote: > > On Wed, Jul 25, 2018 at 11:53:15PM -0700, Hugh Dickins wrote: > > > > and fixing the bug differently ;-) But many thanks for spotting it! > > I thought you might :) The xas_*

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-26 Thread Matthew Wilcox
On Thu, Jul 26, 2018 at 09:40:20AM -0700, Hugh Dickins wrote: > On Thu, 26 Jul 2018, Matthew Wilcox wrote: > > On Wed, Jul 25, 2018 at 11:53:15PM -0700, Hugh Dickins wrote: > > > > and fixing the bug differently ;-) But many thanks for spotting it! > > I thought you might :) The xas_*

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-26 Thread Hugh Dickins
On Thu, 26 Jul 2018, Matthew Wilcox wrote: > On Wed, Jul 25, 2018 at 11:53:15PM -0700, Hugh Dickins wrote: > > and fixing the bug differently ;-) But many thanks for spotting it! I thought you might :) > > I'll look into the next bug you reported ... No need: that idea now works a lot better

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-26 Thread Hugh Dickins
On Thu, 26 Jul 2018, Matthew Wilcox wrote: > On Wed, Jul 25, 2018 at 11:53:15PM -0700, Hugh Dickins wrote: > > and fixing the bug differently ;-) But many thanks for spotting it! I thought you might :) > > I'll look into the next bug you reported ... No need: that idea now works a lot better

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-26 Thread Matthew Wilcox
On Wed, Jul 25, 2018 at 11:53:15PM -0700, Hugh Dickins wrote: > Now I've learnt that an oops on 0xffbe points to EEXIST, > not to EREMOTE, it's easy: patch below fixes those four xfstests > (and no doubt a similar oops I've seen occasionally under swapping > load): so gives clean

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-26 Thread Matthew Wilcox
On Wed, Jul 25, 2018 at 11:53:15PM -0700, Hugh Dickins wrote: > Now I've learnt that an oops on 0xffbe points to EEXIST, > not to EREMOTE, it's easy: patch below fixes those four xfstests > (and no doubt a similar oops I've seen occasionally under swapping > load): so gives clean

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-26 Thread Hugh Dickins
On Tue, 24 Jul 2018, Hugh Dickins wrote: > On Mon, 23 Jul 2018, Matthew Wilcox wrote: > > On Mon, Jul 23, 2018 at 03:42:22PM -0700, Hugh Dickins wrote: > > > On Mon, 23 Jul 2018, Matthew Wilcox wrote: > > > > I figured out a fix and pushed it to the 'ida' branch in > > > >

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-26 Thread Hugh Dickins
On Tue, 24 Jul 2018, Hugh Dickins wrote: > On Mon, 23 Jul 2018, Matthew Wilcox wrote: > > On Mon, Jul 23, 2018 at 03:42:22PM -0700, Hugh Dickins wrote: > > > On Mon, 23 Jul 2018, Matthew Wilcox wrote: > > > > I figured out a fix and pushed it to the 'ida' branch in > > > >

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-24 Thread Hugh Dickins
On Mon, 23 Jul 2018, Matthew Wilcox wrote: > On Mon, Jul 23, 2018 at 03:42:22PM -0700, Hugh Dickins wrote: > > On Mon, 23 Jul 2018, Matthew Wilcox wrote: > > > I figured out a fix and pushed it to the 'ida' branch in > > > git://git.infradead.org/users/willy/linux-dax.git > > > > Great, thanks a

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-24 Thread Hugh Dickins
On Mon, 23 Jul 2018, Matthew Wilcox wrote: > On Mon, Jul 23, 2018 at 03:42:22PM -0700, Hugh Dickins wrote: > > On Mon, 23 Jul 2018, Matthew Wilcox wrote: > > > I figured out a fix and pushed it to the 'ida' branch in > > > git://git.infradead.org/users/willy/linux-dax.git > > > > Great, thanks a

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-23 Thread Matthew Wilcox
On Mon, Jul 23, 2018 at 03:42:22PM -0700, Hugh Dickins wrote: > On Mon, 23 Jul 2018, Matthew Wilcox wrote: > > I figured out a fix and pushed it to the 'ida' branch in > > git://git.infradead.org/users/willy/linux-dax.git > > Great, thanks a lot for sorting that out so quickly. But I've cloned >

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-23 Thread Matthew Wilcox
On Mon, Jul 23, 2018 at 03:42:22PM -0700, Hugh Dickins wrote: > On Mon, 23 Jul 2018, Matthew Wilcox wrote: > > I figured out a fix and pushed it to the 'ida' branch in > > git://git.infradead.org/users/willy/linux-dax.git > > Great, thanks a lot for sorting that out so quickly. But I've cloned >

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-23 Thread Hugh Dickins
On Mon, 23 Jul 2018, Matthew Wilcox wrote: > On Mon, Jul 23, 2018 at 12:14:41PM -0700, Hugh Dickins wrote: > > On Mon, 23 Jul 2018, Matthew Wilcox wrote: > > > On Sun, Jul 22, 2018 at 07:28:01PM -0700, Hugh Dickins wrote: > > > > Whether or not that fixed syzbot's kernel BUG at mm/shmem.c:815! > >

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-23 Thread Hugh Dickins
On Mon, 23 Jul 2018, Matthew Wilcox wrote: > On Mon, Jul 23, 2018 at 12:14:41PM -0700, Hugh Dickins wrote: > > On Mon, 23 Jul 2018, Matthew Wilcox wrote: > > > On Sun, Jul 22, 2018 at 07:28:01PM -0700, Hugh Dickins wrote: > > > > Whether or not that fixed syzbot's kernel BUG at mm/shmem.c:815! > >

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-23 Thread Matthew Wilcox
On Mon, Jul 23, 2018 at 12:14:41PM -0700, Hugh Dickins wrote: > On Mon, 23 Jul 2018, Matthew Wilcox wrote: > > On Sun, Jul 22, 2018 at 07:28:01PM -0700, Hugh Dickins wrote: > > > Whether or not that fixed syzbot's kernel BUG at mm/shmem.c:815! > > > I don't know, but I'm afraid it has not fixed

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-23 Thread Matthew Wilcox
On Mon, Jul 23, 2018 at 12:14:41PM -0700, Hugh Dickins wrote: > On Mon, 23 Jul 2018, Matthew Wilcox wrote: > > On Sun, Jul 22, 2018 at 07:28:01PM -0700, Hugh Dickins wrote: > > > Whether or not that fixed syzbot's kernel BUG at mm/shmem.c:815! > > > I don't know, but I'm afraid it has not fixed

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-23 Thread Hugh Dickins
On Mon, 23 Jul 2018, Matthew Wilcox wrote: > On Sun, Jul 22, 2018 at 07:28:01PM -0700, Hugh Dickins wrote: > > Whether or not that fixed syzbot's kernel BUG at mm/shmem.c:815! > > I don't know, but I'm afraid it has not fixed linux-next breakage of > > huge tmpfs: I get a similar page_to_pgoff BUG

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-23 Thread Hugh Dickins
On Mon, 23 Jul 2018, Matthew Wilcox wrote: > On Sun, Jul 22, 2018 at 07:28:01PM -0700, Hugh Dickins wrote: > > Whether or not that fixed syzbot's kernel BUG at mm/shmem.c:815! > > I don't know, but I'm afraid it has not fixed linux-next breakage of > > huge tmpfs: I get a similar page_to_pgoff BUG

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-23 Thread Matthew Wilcox
On Sun, Jul 22, 2018 at 07:28:01PM -0700, Hugh Dickins wrote: > Whether or not that fixed syzbot's kernel BUG at mm/shmem.c:815! > I don't know, but I'm afraid it has not fixed linux-next breakage of > huge tmpfs: I get a similar page_to_pgoff BUG at mm/filemap.c:1466! > > Please try something

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-23 Thread Matthew Wilcox
On Sun, Jul 22, 2018 at 07:28:01PM -0700, Hugh Dickins wrote: > Whether or not that fixed syzbot's kernel BUG at mm/shmem.c:815! > I don't know, but I'm afraid it has not fixed linux-next breakage of > huge tmpfs: I get a similar page_to_pgoff BUG at mm/filemap.c:1466! > > Please try something

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-22 Thread Hugh Dickins
On Mon, 9 Jul 2018, Matthew Wilcox wrote: > On Fri, Jul 06, 2018 at 06:19:02PM -0700, syzbot wrote: > > Hello, > > > > syzbot found the following crash on: > > > > HEAD commit:526674536360 Add linux-next specific files for 20180706 > > git tree: linux-next > > console output:

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-22 Thread Hugh Dickins
On Mon, 9 Jul 2018, Matthew Wilcox wrote: > On Fri, Jul 06, 2018 at 06:19:02PM -0700, syzbot wrote: > > Hello, > > > > syzbot found the following crash on: > > > > HEAD commit:526674536360 Add linux-next specific files for 20180706 > > git tree: linux-next > > console output:

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-09 Thread Matthew Wilcox
On Fri, Jul 06, 2018 at 06:19:02PM -0700, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit:526674536360 Add linux-next specific files for 20180706 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=116d16fc40 > kernel

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-09 Thread Matthew Wilcox
On Fri, Jul 06, 2018 at 06:19:02PM -0700, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit:526674536360 Add linux-next specific files for 20180706 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=116d16fc40 > kernel

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-06 Thread Matthew Wilcox
On Fri, Jul 06, 2018 at 06:19:02PM -0700, syzbot wrote: > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+b8e0dfee3fd8c9012...@syzkaller.appspotmail.com > > raw: 02fffc001028 ea0007011dc8 ea0007058b48 8801a7576ab8 > raw:

Re: kernel BUG at mm/shmem.c:LINE!

2018-07-06 Thread Matthew Wilcox
On Fri, Jul 06, 2018 at 06:19:02PM -0700, syzbot wrote: > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+b8e0dfee3fd8c9012...@syzkaller.appspotmail.com > > raw: 02fffc001028 ea0007011dc8 ea0007058b48 8801a7576ab8 > raw:

kernel BUG at mm/shmem.c:LINE!

2018-07-06 Thread syzbot
Hello, syzbot found the following crash on: HEAD commit:526674536360 Add linux-next specific files for 20180706 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=116d16fc40 kernel config: https://syzkaller.appspot.com/x/.config?x=c8d1cfc0cb798e48

kernel BUG at mm/shmem.c:LINE!

2018-07-06 Thread syzbot
Hello, syzbot found the following crash on: HEAD commit:526674536360 Add linux-next specific files for 20180706 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=116d16fc40 kernel config: https://syzkaller.appspot.com/x/.config?x=c8d1cfc0cb798e48