On 27/08/13 17:30, Dave Jones wrote:
Seems to do the trick.
We are running many virtualization hosts with Linux 3.11.3, qemu 1.6.1 +
kvm and ksm. The hosts have 128GB RAM, 10GB swap and 24x AMD Opteron
6238 cores.
Several times few weeks ago, we have seen the OOM killer come to life
and qu
On Tue, Aug 27, 2013 at 12:24:27PM -0400, Dave Jones wrote:
> >
> > I managed to trigger the issue as well. The patch below fixes it.
> > Dave, could you please give it a shot once time permit?
>
> Seems to do the trick.
>
> Tested-by: Dave Jones
Thanks a lot, Dave!
--
To unsubscribe from t
On Tue, Aug 27, 2013 at 12:37:18PM +0400, Cyrill Gorcunov wrote:
> On Mon, Aug 26, 2013 at 06:28:33PM -0400, Dave Jones wrote:
> > >
> > > I've not tried matching up bits with Dave's reports, and just going
> > > into a meeting now, but this patch looks worth a try: probably Cyrill
> > >
On Mon, Aug 26, 2013 at 06:28:33PM -0400, Dave Jones wrote:
> >
> > I've not tried matching up bits with Dave's reports, and just going
> > into a meeting now, but this patch looks worth a try: probably Cyrill
> > can improve it meanwhile to what he actually wants there (I'm
> > surprised any
On Mon, Aug 26, 2013 at 04:15:00PM -0700, Linus Torvalds wrote:
> On Mon, Aug 26, 2013 at 3:08 PM, Hugh Dickins wrote:
> >
> > I just did a quick diff of 3.11-rc7/mm against 3.10, and here's
> > a line in mremap which worries me. That set_pte_at() is operating
> > on anything that isn't pte_none(
On Mon, Aug 26, 2013 at 3:08 PM, Hugh Dickins wrote:
>
> I just did a quick diff of 3.11-rc7/mm against 3.10, and here's
> a line in mremap which worries me. That set_pte_at() is operating
> on anything that isn't pte_none(), so the pte_mksoft_dirty() looks
> prone to corrupt a swap entry.
Uhhuh
On Mon, Aug 26, 2013 at 03:08:45PM -0700, Hugh Dickins wrote:
> > That said, google does find "swap_free: Unused swap offset entry"
> > reports from over the years. Most of them seem to be single-bit
> > errors, though (ie when the entry is 0100 or similar I'm more
> > inclined to blame a
On Mon, 26 Aug 2013, Linus Torvalds wrote:
> On Mon, Aug 26, 2013 at 1:15 PM, Linus Torvalds
> wrote:
> >
> > So I'm almost likely to think that we are more likely to have
> > something wrong in the messy magical special cases.
>
> Of course, the good news would be if it actually ends up being th
On Tue, Aug 27, 2013 at 01:49:40AM +0400, Cyrill Gorcunov wrote:
> On Mon, Aug 26, 2013 at 05:42:44PM -0400, Dave Jones wrote:
> >
> > Yeah, for reproducing this bug, I'd stick to running it as a user, without
> > --dangerous.
> > you might still hit a few fairly-easy to trigger warn-on/prin
On Mon, Aug 26, 2013 at 05:42:44PM -0400, Dave Jones wrote:
>
> Yeah, for reproducing this bug, I'd stick to running it as a user, without
> --dangerous.
> you might still hit a few fairly-easy to trigger warn-on/printks. I run with
> this applied: http://paste.fedoraproject.org/34960/55323613/ra
On Tue, Aug 27, 2013 at 01:37:54AM +0400, Cyrill Gorcunov wrote:
> On Tue, Aug 27, 2013 at 12:42:03AM +0400, Cyrill Gorcunov wrote:
> > On Mon, Aug 26, 2013 at 04:37:02PM -0400, Dave Jones wrote:
> > >
> > > Try adding the -C64 to the invocation in scripts/test-multi.sh,
> > > and perhaps up'
On Tue, Aug 27, 2013 at 12:42:03AM +0400, Cyrill Gorcunov wrote:
> On Mon, Aug 26, 2013 at 04:37:02PM -0400, Dave Jones wrote:
> >
> > Try adding the -C64 to the invocation in scripts/test-multi.sh,
> > and perhaps up'ing the NR_PROCESSES variable there too.
>
> Thanks! I'll ping you if I manage
On Mon, Aug 26, 2013 at 1:15 PM, Linus Torvalds
wrote:
>
> So I'm almost likely to think that we are more likely to have
> something wrong in the messy magical special cases.
Of course, the good news would be if it actually ends up being the
soft-dirty stuff, and bisection hits something recent.
On Mon, Aug 26, 2013 at 04:37:02PM -0400, Dave Jones wrote:
>
> Try adding the -C64 to the invocation in scripts/test-multi.sh,
> and perhaps up'ing the NR_PROCESSES variable there too.
Thanks! I'll ping you if I manage to crash my instance.
--
To unsubscribe from this list: send the line "unsubs
On Tue, Aug 27, 2013 at 12:18:46AM +0400, Cyrill Gorcunov wrote:
> On Mon, Aug 26, 2013 at 03:08:22PM -0400, Dave Jones wrote:
> > On Mon, Aug 26, 2013 at 11:45:53AM +0800, Hillf Danton wrote:
> > > On Fri, Aug 23, 2013 at 11:53 AM, Dave Jones wrote:
> > > >
> > > > It actually seems worse
On Mon, Aug 26, 2013 at 03:08:22PM -0400, Dave Jones wrote:
> On Mon, Aug 26, 2013 at 11:45:53AM +0800, Hillf Danton wrote:
> > On Fri, Aug 23, 2013 at 11:53 AM, Dave Jones wrote:
> > >
> > > It actually seems worse, seems I can trigger it even easier now, as if
> > > there's a leak.
> > >
>
On Mon, Aug 26, 2013 at 12:08 PM, Dave Jones wrote:
>
> [ 4588.541886] swap_free: Unused swap offset entry 2d15
> [ 4588.541952] BUG: Bad page map in process trinity-kid12 pte:005a2a80
> pmd:22c01f067
>
> I can reproduce this pretty quickly by driving the system into swapping using
> a few i
On Mon, Aug 26, 2013 at 11:45:53AM +0800, Hillf Danton wrote:
> On Fri, Aug 23, 2013 at 11:53 AM, Dave Jones wrote:
> >
> > It actually seems worse, seems I can trigger it even easier now, as if
> > there's a leak.
> >
> Can you please try the new fix for TLB flush?
>
> commit 2b047252d0
On Fri, Aug 23, 2013 at 11:53 AM, Dave Jones wrote:
>
> It actually seems worse, seems I can trigger it even easier now, as if
> there's a leak.
>
Can you please try the new fix for TLB flush?
commit 2b047252d087be7f2ba
Fix TLB gather virtual address range invalidation corner cases
--
To unsubsc
On Fri, Aug 23, 2013 at 11:27:29AM +0800, Hillf Danton wrote:
> On Fri, Aug 23, 2013 at 11:21 AM, Dave Jones wrote:
> >
> > I still see the swap_free messages with this applied.
> >
> Decremented?
It actually seems worse, seems I can trigger it even easier now, as if
there's a leak.
On Thu, Aug 22, 2013 at 11:21:28AM +0800, Hillf Danton wrote:
> On Thu, Aug 22, 2013 at 4:49 AM, Dave Jones wrote:
> >
> > didn't hit the bug_on, but got a bunch of
> >
> > [ 424.077993] swap_free: Unused swap offset entry 000187d5
> > [ 439.377194] swap_free: Unused swap offset entry 0001
On Thu, Aug 22, 2013 at 4:49 AM, Dave Jones wrote:
>
> didn't hit the bug_on, but got a bunch of
>
> [ 424.077993] swap_free: Unused swap offset entry 000187d5
> [ 439.377194] swap_free: Unused swap offset entry 000187e7
> [ 441.998411] swap_free: Unused swap offset entry 000187ee
> [ 446.9565
On Thu, Aug 22, 2013 at 4:49 AM, Dave Jones wrote:
>
> didn't hit the bug_on, but got a bunch of
>
> [ 424.077993] swap_free: Unused swap offset entry 000187d5
> [ 439.377194] swap_free: Unused swap offset entry 000187e7
> [ 441.998411] swap_free: Unused swap offset entry 000187ee
> [ 446.9565
On Tue, Aug 20, 2013 at 12:39:05PM +0800, Hillf Danton wrote:
> On Tue, Aug 20, 2013 at 7:18 AM, Dave Jones wrote:
>
> --- a/mm/memory.c Wed Aug 7 16:29:34 2013
> +++ b/mm/memory.c Tue Aug 20 11:13:06 2013
> @@ -933,8 +933,10 @@ again:
> if (progress >= 32) {
> progress = 0;
> if (
On Tue, Aug 20, 2013 at 7:18 AM, Dave Jones wrote:
>
> btw, anyone have thoughts on a patch something like below ?
And another(sorry if message is reformatted by the mail agent,
and it took my an hour to get the agent back to the correct format but failed,
and thanks a lot for any howto send plai
On Thu, Aug 08, 2013 at 11:20:28PM +0800, Hillf Danton wrote:
> On Wed, Aug 7, 2013 at 11:30 PM, Dave Jones wrote:
> > printk didn't trigger.
> >
> Is a corrupted page table entry encountered, according to the
> comment of swap_duplicate()?
>
>
> --- a/mm/swapfile.c Wed Aug 7 17:27:22
On Thu, Aug 08, 2013 at 11:20:28PM +0800, Hillf Danton wrote:
> On Wed, Aug 7, 2013 at 11:30 PM, Dave Jones wrote:
> > printk didn't trigger.
> >
> Is a corrupted page table entry encountered, according to the
> comment of swap_duplicate()?
>
>
> --- a/mm/swapfile.c Wed Aug 7 17:27:22
On Wed, Aug 7, 2013 at 11:30 PM, Dave Jones wrote:
> printk didn't trigger.
>
Is a corrupted page table entry encountered, according to the
comment of swap_duplicate()?
--- a/mm/swapfile.c Wed Aug 7 17:27:22 2013
+++ b/mm/swapfile.c Thu Aug 8 23:12:30 2013
@@ -770,6 +770,7 @@ int free_
void __lru_cache_add(struct page *page)
{
struct pagevec *pvec = &get_cpu_var(lru_add_pvec);
page_cache_get(page);
if (!pagevec_space(pvec))
__pagevec_lru_add(pvec);
pagevec_add(pvec, page);
put_cpu_var(lru_add_pvec);
}
I added a printk, an
On Wed, Aug 07, 2013 at 06:04:20PM +0800, Hillf Danton wrote:
> > There were a slew of these. same trace, different addr/anon_vma/index.
> > mapping always null.
> >
> Would you please run again with the debug info added?
> ---
> --- a/mm/swapfile.c Wed Aug 7 17:27:22 2013
> +++ b/mm/swapf
Hello Dave
On Wed, Aug 7, 2013 at 1:51 PM, Dave Jones wrote:
> Seen while fuzzing with lots of child processes.
>
> swap_free: Unused swap offset entry 001263f5
> BUG: Bad page map in process trinity-child29 pte:24c7ea00 pmd:09fec067
> addr:7f9db958d000 vm_flags:00100073 anon_vma:88022c0
31 matches
Mail list logo
