linux-kernel - Re: 6.10/regression/bisected - after f1d97e769152 I spotted increased execution time of the kswapd0 process and symptoms as if there is not enough memory

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Message-ID: <CAK-xaQZ=c7aociwZ5YQreTmT+sBLGdH0rkTKmFzt4i_mrXBmgg@mail.gmail.com>
Date: Thu, 4 Jul 2024 15:33:30 +0200
From: Andrea Gelmini <andrea.gelmini@...il.com>
To: Filipe Manana <fdmanana@...nel.org>
Cc: Mikhail Gavrilov <mikhail.v.gavrilov@...il.com>, 
	Linux List Kernel Mailing <linux-kernel@...r.kernel.org>, 
	Linux regressions mailing list <regressions@...ts.linux.dev>, Btrfs BTRFS <linux-btrfs@...r.kernel.org>, 
	dsterba@...e.com, josef@...icpanda.com
Subject: Re: 6.10/regression/bisected - after f1d97e769152 I spotted increased
 execution time of the kswapd0 process and symptoms as if there is not enough memory

Il giorno gio 4 lug 2024 alle ore 11:57 Filipe Manana
<fdmanana@...nel.org> ha scritto:
> I wonder if you have bpftrace installed and can run the following
> script while doing the test:

Yeap, no problem. It worked. I mean, recorded on external usb stick... But...
On my laptop I have kernel 6.6.36 and rc6+branch...
Uhm... Yesterday I switched back to 6.6.36 after wrote the email,
well, not exactly, I usually work with 6.6.36 and yesterday rebooted
with rc6 to test the branch patches (so the sluggish issue weeks ago,
so I didn't move from 6.6.36).
Anyway, after wrote you the report while watching the "live action", I
rebooted 6.6.36.

Anyway, tried right now with bpftrace and I can't replicate it. Kernel
exactly the same. No recompilo or so on...

I just can think about a few LibreOffice git subvolume deleted
(~215000 files), and a few created.
A few tens of giga deleted of files (mp4 and mkv). Uhm... dunno if it
could be related or something changed on BTRFS layout.

Well, I have the nighlty snapshot (well, it's not on every subvolume
of the fs). I ran tar on that, and we see.

I tell you in a few hours. In the meanwhile I keep running rc6+ and
see if something happens.