On Thu, 20 Mar 2014, Sasha Levin wrote:
> On 03/20/2014 09:51 AM, Dave Jones wrote:
> > On Wed, Mar 19, 2014 at 10:00:29PM -0700, Hugh Dickins wrote:
> >
> > > > This might be collateral damage from the swapops thing, I guess we
> > won't know until
> > > > that gets fixed, but I thought I'd m
On 03/20/2014 09:51 AM, Dave Jones wrote:
On Wed, Mar 19, 2014 at 10:00:29PM -0700, Hugh Dickins wrote:
> > This might be collateral damage from the swapops thing, I guess we won't
know until
> > that gets fixed, but I thought I'd mention that we might still have a
problem here.
>
> Ye
On Wed, Mar 19, 2014 at 10:00:29PM -0700, Hugh Dickins wrote:
> > This might be collateral damage from the swapops thing, I guess we won't
> > know until
> > that gets fixed, but I thought I'd mention that we might still have a
> > problem here.
>
> Yes, those Bad rss-counters could well
On Wed, 19 Mar 2014, Dave Jones wrote:
> On Tue, Mar 18, 2014 at 07:19:09PM -0700, Hugh Dickins wrote:
>
> > Another positive on the rss counters, great, thanks Dave.
> > That encourages me to think again on the swapops BUG, but no promises.
>
> So while I slept I ran a test kernel with that sw
On Tue, Mar 18, 2014 at 07:19:09PM -0700, Hugh Dickins wrote:
> Another positive on the rss counters, great, thanks Dave.
> That encourages me to think again on the swapops BUG, but no promises.
So while I slept I ran a test kernel with that swapops BUG replaced with a
printk.
I'm not sure of
On Tue, Mar 18, 2014 at 05:38:38PM -0700, Hugh Dickins wrote:
>
> (Cyrill, entirely unrelated, but in preparing this patch I noticed
> your soft_dirty work in install_file_pte(): which looked good at
> first, until I realized that it's propagating the soft_dirty of a
> pte it's about to zap comple
On Tue 18-03-14 19:37:01, Hugh Dickins wrote:
> On Tue, 18 Mar 2014, Linus Torvalds wrote:
> > On Tue, Mar 18, 2014 at 7:06 PM, Hugh Dickins wrote:
> > >
> > > I'd love that, if we can get away with it now: depends very
> > > much on whether we then turn out to break userspace or not.
> >
> > Rig
On Tue, Mar 18, 2014 at 7:37 PM, Hugh Dickins wrote:
>
> For 3.15, and probably 3.16 too, we should keep in place whatever
> partial accommodations we have for the case (such as allowing for
> anon and swap in fremap's zap_pte), in case we do need to revert;
> but clean those away later on. (Not
On 03/18/2014 10:12 PM, Hugh Dickins wrote:
On Tue, 18 Mar 2014, Sasha Levin wrote:
On 03/18/2014 08:38 PM, Hugh Dickins wrote:
On Tue, 11 Mar 2014, Dave Jones wrote:
On Tue, Mar 11, 2014 at 09:36:03PM +0400, Cyrill Gorcunov wrote:
> On Tue, Mar 11, 2014 at 01:10:45PM -0400, Dave Jones wrot
On Tue, 18 Mar 2014, Linus Torvalds wrote:
> On Tue, Mar 18, 2014 at 7:06 PM, Hugh Dickins wrote:
> >
> > I'd love that, if we can get away with it now: depends very
> > much on whether we then turn out to break userspace or not.
>
> Right. I suspect we can, though, but it's one of those "we can
On Tue, Mar 18, 2014 at 7:06 PM, Hugh Dickins wrote:
>
> I'd love that, if we can get away with it now: depends very
> much on whether we then turn out to break userspace or not.
Right. I suspect we can, though, but it's one of those "we can try it
and see". Remind me early in the 3.15 merge wind
On Tue, 18 Mar 2014, Dave Jones wrote:
> On Tue, Mar 18, 2014 at 10:06:02PM -0400, Dave Jones wrote:
> > On Tue, Mar 18, 2014 at 09:32:36PM -0400, Sasha Levin wrote:
> >
> > > > Untested patch below: I can't quite say Reported-by, because it may
> > > > not even be one that you and Sasha ha
On Tue, 18 Mar 2014, Sasha Levin wrote:
> On 03/18/2014 08:38 PM, Hugh Dickins wrote:
> > On Tue, 11 Mar 2014, Dave Jones wrote:
> > > On Tue, Mar 11, 2014 at 09:36:03PM +0400, Cyrill Gorcunov wrote:
> > > > On Tue, Mar 11, 2014 at 01:10:45PM -0400, Dave Jones wrote:
> > > > > >
> > > > > >
On Tue, Mar 18, 2014 at 10:06:02PM -0400, Dave Jones wrote:
> On Tue, Mar 18, 2014 at 09:32:36PM -0400, Sasha Levin wrote:
>
> > > Untested patch below: I can't quite say Reported-by, because it may
> > > not even be one that you and Sasha have been seeing; but I'm hopeful,
> > > remap_fi
On Tue, 18 Mar 2014, Linus Torvalds wrote:
> On Tue, Mar 18, 2014 at 5:38 PM, Hugh Dickins wrote:
> >
> > And yes, it is possible (though very unusual) to find an anon page or
> > swap entry in a VM_SHARED nonlinear mapping: coming from that horrid
> > get_user_pages(write, force) case which COWs
On Tue, Mar 18, 2014 at 09:32:36PM -0400, Sasha Levin wrote:
> > Untested patch below: I can't quite say Reported-by, because it may
> > not even be one that you and Sasha have been seeing; but I'm hopeful,
> > remap_file_pages is in the list.
> >
> > Please give this a try, preferably on 3.
On 03/18/2014 08:38 PM, Hugh Dickins wrote:
On Tue, 11 Mar 2014, Dave Jones wrote:
On Tue, Mar 11, 2014 at 09:36:03PM +0400, Cyrill Gorcunov wrote:
> On Tue, Mar 11, 2014 at 01:10:45PM -0400, Dave Jones wrote:
> > >
> > > Dave, iirc trinity can write log file pointing which exactly sysca
On Tue, Mar 18, 2014 at 5:38 PM, Hugh Dickins wrote:
>
> And yes, it is possible (though very unusual) to find an anon page or
> swap entry in a VM_SHARED nonlinear mapping: coming from that horrid
> get_user_pages(write, force) case which COWs even in a shared mapping.
Hmm. Maybe we could just d
On Tue, 11 Mar 2014, Dave Jones wrote:
> On Tue, Mar 11, 2014 at 09:36:03PM +0400, Cyrill Gorcunov wrote:
> > On Tue, Mar 11, 2014 at 01:10:45PM -0400, Dave Jones wrote:
> > > >
> > > > Dave, iirc trinity can write log file pointing which exactly syscall
> sequence
> > > > was passed, righ
On Tue, Mar 11, 2014 at 01:39:17PM -0400, Dave Jones wrote:
> >
> > Sasha already gave a link to the syscalls sequence, so no rush.
>
> It'd be nice to get a more concise reproducer, his list had a little of
> everything in there.
Dave, could you please send me your config privately so I woul
On Tue, Mar 11, 2014 at 09:36:03PM +0400, Cyrill Gorcunov wrote:
> On Tue, Mar 11, 2014 at 01:10:45PM -0400, Dave Jones wrote:
> > >
> > > Dave, iirc trinity can write log file pointing which exactly syscall
> > sequence
> > > was passed, right? Share it too please.
> >
> > Hm, I may h
On Tue, Mar 11, 2014 at 01:10:45PM -0400, Dave Jones wrote:
> >
> > Dave, iirc trinity can write log file pointing which exactly syscall
> sequence
> > was passed, right? Share it too please.
>
> Hm, I may have been mistaken, and the damage was done by a previous run.
> I went from being able
On Tue, Mar 11, 2014 at 06:37:50PM +0400, Cyrill Gorcunov wrote:
> > > After reading some more, I suppose the idea I had is wrong,
> > investigating.
> > > Will ping if I find something.
> >
> > I can rule it out anyway, I can reproduce this by telling trinity to do
> > nothing
> > ot
On 03/11/2014 10:37 AM, Cyrill Gorcunov wrote:
On Tue, Mar 11, 2014 at 10:28:17AM -0400, Dave Jones wrote:
On Tue, Mar 11, 2014 at 05:41:58PM +0400, Cyrill Gorcunov wrote:
> On Tue, Mar 11, 2014 at 09:23:05AM -0400, Sasha Levin wrote:
> > >>
> > >>Ok, with move_pages excluded it still oops
On Tue, Mar 11, 2014 at 10:28:17AM -0400, Dave Jones wrote:
> On Tue, Mar 11, 2014 at 05:41:58PM +0400, Cyrill Gorcunov wrote:
> > On Tue, Mar 11, 2014 at 09:23:05AM -0400, Sasha Levin wrote:
> > > >>
> > > >>Ok, with move_pages excluded it still oopses.
> > > >
> > > >Dave, is it possible to
On Tue, Mar 11, 2014 at 05:41:58PM +0400, Cyrill Gorcunov wrote:
> On Tue, Mar 11, 2014 at 09:23:05AM -0400, Sasha Levin wrote:
> > >>
> > >>Ok, with move_pages excluded it still oopses.
> > >
> > >Dave, is it possible to somehow figure out was someone reading pagemap
> > >file
> > >at mome
On Tue, Mar 11, 2014 at 09:23:05AM -0400, Sasha Levin wrote:
> >>
> >>Ok, with move_pages excluded it still oopses.
> >
> >Dave, is it possible to somehow figure out was someone reading pagemap file
> >at moment of the bug triggering?
>
> We can sprinkle printk()s wherever might be useful, might n
On 03/11/2014 09:20 AM, Cyrill Gorcunov wrote:
On Tue, Mar 11, 2014 at 01:30:17AM -0400, Dave Jones wrote:
> > >
> > > I don't see any holes in regular migration. Do you know if this is
> > > reproducible with CONFIG_NUMA_BALANCING=n or CONFIG_NUMA=n?
> >
> > CONFIG_NUMA_BALANCING
On Tue, Mar 11, 2014 at 01:30:17AM -0400, Dave Jones wrote:
> > > >
> > > > I don't see any holes in regular migration. Do you know if this is
> > > > reproducible with CONFIG_NUMA_BALANCING=n or CONFIG_NUMA=n?
> > >
> > > CONFIG_NUMA_BALANCING was n already btw, so I'll do a NUMA=n run.
On 03/11/2014 01:30 AM, Dave Jones wrote:
On Mon, Mar 10, 2014 at 10:01:58PM -0700, Andrew Morton wrote:
> On Tue, 11 Mar 2014 00:51:09 -0400 Dave Jones wrote:
>
> > On Mon, Mar 10, 2014 at 09:46:12PM -0700, Andrew Morton wrote:
> > > On Mon, 10 Mar 2014 20:13:40 -0700 Andrew Morton
w
On Mon, Mar 10, 2014 at 10:01:58PM -0700, Andrew Morton wrote:
> On Tue, 11 Mar 2014 00:51:09 -0400 Dave Jones wrote:
>
> > On Mon, Mar 10, 2014 at 09:46:12PM -0700, Andrew Morton wrote:
> > > On Mon, 10 Mar 2014 20:13:40 -0700 Andrew Morton
> > wrote:
> > >
> > > > > Anyone ? I'm hi
On Mon, Mar 10, 2014 at 10:01:58PM -0700, Andrew Morton wrote:
> On Tue, 11 Mar 2014 00:51:09 -0400 Dave Jones wrote:
>
> > On Mon, Mar 10, 2014 at 09:46:12PM -0700, Andrew Morton wrote:
> > > On Mon, 10 Mar 2014 20:13:40 -0700 Andrew Morton
> > wrote:
> > >
> > > > > Anyone ? I'm hi
On Tue, 11 Mar 2014 00:51:09 -0400 Dave Jones wrote:
> On Mon, Mar 10, 2014 at 09:46:12PM -0700, Andrew Morton wrote:
> > On Mon, 10 Mar 2014 20:13:40 -0700 Andrew Morton
> wrote:
> >
> > > > Anyone ? I'm hitting this trace on an almost daily basis, which is a
> pain
> > > > while trying
On Mon, Mar 10, 2014 at 09:46:12PM -0700, Andrew Morton wrote:
> On Mon, 10 Mar 2014 20:13:40 -0700 Andrew Morton
> wrote:
>
> > > Anyone ? I'm hitting this trace on an almost daily basis, which is a pain
> > > while trying to reproduce a different bug..
> >
> > Damn, I thought we'd fixe
On Mon, Mar 10, 2014 at 09:46:12PM -0700, Andrew Morton wrote:
> On Mon, 10 Mar 2014 20:13:40 -0700 Andrew Morton
> wrote:
>
> > > Anyone ? I'm hitting this trace on an almost daily basis, which is a pain
> > > while trying to reproduce a different bug..
> >
> > Damn, I thought we'd fixe
On Mon, 10 Mar 2014 20:13:40 -0700 Andrew Morton
wrote:
> > Anyone ? I'm hitting this trace on an almost daily basis, which is a pain
> > while trying to reproduce a different bug..
>
> Damn, I thought we'd fixed that but it seems not. Cc's added.
>
> Guys, what stops the migration target pag
On Mon, 10 Mar 2014 22:49:06 -0400 Dave Jones wrote:
> ...
>
> > > 124 static inline struct page *migration_entry_to_page(swp_entry_t
> entry)
> > > 125 {
> > > 126 struct page *p = pfn_to_page(swp_offset(entry));
> > > 127 /*
> > > 128 * Any use of migration e
On Thu, Mar 06, 2014 at 07:22:10PM -0500, Dave Jones wrote:
> On Wed, Mar 05, 2014 at 12:57:25PM -0500, Dave Jones wrote:
> > On Wed, Mar 05, 2014 at 12:45:03PM -0500, Dave Jones wrote:
> > > I just saw this on my box that's been running trinity..
> > >
> > > [48825.517189] BUG: Bad rs
On Wed, Mar 05, 2014 at 12:57:25PM -0500, Dave Jones wrote:
> On Wed, Mar 05, 2014 at 12:45:03PM -0500, Dave Jones wrote:
> > I just saw this on my box that's been running trinity..
> >
> > [48825.517189] BUG: Bad rss-counter state mm:880177921d40 idx:0 val:1
> (Not tainted)
> >
>
On Wed, Mar 05, 2014 at 12:45:03PM -0500, Dave Jones wrote:
> I just saw this on my box that's been running trinity..
>
> [48825.517189] BUG: Bad rss-counter state mm:880177921d40 idx:0 val:1
> (Not tainted)
>
> There's nothing else, no trace, nothing. Any ideas where to begin with th
I just saw this on my box that's been running trinity..
[48825.517189] BUG: Bad rss-counter state mm:880177921d40 idx:0 val:1 (Not
tainted)
There's nothing else, no trace, nothing. Any ideas where to begin with this?
Dave
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