Hello again...
So I spent all weekend doing further tests, since this issue is
really bugging me for obvious reasons.
I thought it would be beneficial if I created a bug report that
summarized and centralized everything in one place rather than
having everything spread across several lists and p
On 2016/07/13 22:47, Michal Hocko wrote:
> On Wed 13-07-16 15:18:11, Matthias Dahl wrote:
>> I tried to figure this out myself but
>> couldn't find anything -- what does the number "-3" state? It is the
>> position in some chain or has it a different meaning?
>
> $ git grep "kmem_cache_create.*bio
Hello...
I am rather persistent (stubborn?) when it comes to tracking down bugs,
if somehow possible... and it seems it paid off... somewhat. ;-)
So I did quite a lot more further tests and came up with something very
interesting: As long as the RAID is in sync (as-in: sync_action=idle),
I can n
Hello Ondrej...
On 2016-07-13 18:24, Ondrej Kozina wrote:
One step after another.
Sorry, it was not meant to be rude or anything... more frustration
since I cannot be of more help and I really would like to jump in
head-first and help fixing it... but lack the necessary insight into
the kerne
On 07/13/2016 05:32 PM, Matthias Dahl wrote:
No matter what, I have no clue how to further diagnose this issue. And
given that I already had unsolvable issues with dm-crypt a couple of
months ago with my old machine where the system simply hang itself or
went OOM when the swap was encrypted and
Hello...
On 2016-07-13 15:47, Michal Hocko wrote:
This is getting out of my area of expertise so I am not sure I can help
you much more, I am afraid.
That's okay. Thank you so much for investing the time.
For what it is worth, I did some further tests and here is what I came
up with:
If I c
On Wed 13-07-16 15:18:11, Matthias Dahl wrote:
> Hello Michal,
>
> many thanks for all your time and help on this issue. It is very much
> appreciated and I hope we can track this down somehow.
>
> On 2016-07-13 14:18, Michal Hocko wrote:
>
> > So it seems we are accumulating bios and 256B objec
Hello Michal,
many thanks for all your time and help on this issue. It is very much
appreciated and I hope we can track this down somehow.
On 2016-07-13 14:18, Michal Hocko wrote:
So it seems we are accumulating bios and 256B objects. Buffer heads as
well but so much. Having over 4G worth of b
On Wed 13-07-16 13:21:26, Michal Hocko wrote:
> On Tue 12-07-16 16:56:32, Matthias Dahl wrote:
[...]
> > If that support is baked into the Fedora provided kernel that is. If
> > you could give me a few hints or pointers, how to properly do a allocator
> > trace point and get some decent data out of
On Tue 12-07-16 16:56:32, Matthias Dahl wrote:
> Hello Michal...
>
> On 2016-07-12 16:07, Michal Hocko wrote:
>
> > /proc/slabinfo could at least point on who is eating that memory.
>
> Thanks. I have made another test (and thus again put the RAID10 out of
> sync for the 100th time, sigh) and ma
Hello Michal...
On 2016-07-12 16:07, Michal Hocko wrote:
/proc/slabinfo could at least point on who is eating that memory.
Thanks. I have made another test (and thus again put the RAID10 out of
sync for the 100th time, sigh) and made regular snapshots of slabinfo
which I have attached to this
On Tue 12-07-16 14:42:12, Matthias Dahl wrote:
> Hello Michal...
>
> On 2016-07-12 13:49, Michal Hocko wrote:
>
> > I am not a storage expert (not even mention dm-crypt). But what those
> > counters say is that the IO completion doesn't trigger so the
> > PageWriteback flag is still set. Such a p
On Tue 12-07-16 13:49:20, Michal Hocko wrote:
> On Tue 12-07-16 13:28:12, Matthias Dahl wrote:
> > Hello Michal...
> >
> > On 2016-07-12 11:50, Michal Hocko wrote:
> >
> > > This smells like file pages are stuck in the writeback somewhere and the
> > > anon memory is not reclaimable because you d
On Tue 12-07-16 13:28:12, Matthias Dahl wrote:
> Hello Michal...
>
> On 2016-07-12 11:50, Michal Hocko wrote:
>
> > This smells like file pages are stuck in the writeback somewhere and the
> > anon memory is not reclaimable because you do not have any swap device.
>
> Not having a swap device sh
Hello Michal...
On 2016-07-12 13:49, Michal Hocko wrote:
I am not a storage expert (not even mention dm-crypt). But what those
counters say is that the IO completion doesn't trigger so the
PageWriteback flag is still set. Such a page is not reclaimable
obviously. So I would check the IO deliver
On Tue 12-07-16 10:27:37, Matthias Dahl wrote:
> Hello,
>
> I posted this issue already on linux-mm, linux-kernel and dm-devel a
> few days ago and after further investigation it seems like that this
> issue is somehow related to the fact that I am using an Intel Rapid
> Storage RAID10, so I am su
Hello Michal...
On 2016-07-12 11:50, Michal Hocko wrote:
This smells like file pages are stuck in the writeback somewhere and
the
anon memory is not reclaimable because you do not have any swap device.
Not having a swap device shouldn't be a problem -- and in this case, it
would cause even m
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