linux-kernel - Re: backing up ext4 fs, system unresponsive, thrashing like crazy even though swap is unused

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <alpine.LFD.2.02.1212032157480.4173@soupermouf>
Date:	Mon, 3 Dec 2012 22:00:06 +0200 (EET)
From:	Dimitrios Apostolou <jimis@....net>
To:	Eric Paris <eparis@...isplace.org>, Theodore Ts'o <tytso@....edu>
cc:	Roland Eggner <edvx1@...temanalysen.net>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Catalin Marinas <catalin.marinas@....com>
Subject: Re: backing up ext4 fs, system unresponsive, thrashing like crazy
 even though swap is unused

On Mon, 3 Dec 2012, Dimitrios Apostolou wrote:
>
> I've managed to reproduce the scenario with concurrent "du" commands running 
> on the filesystems. I'll try doing it once more, but it may take a while to 
> get the dmesg/slabinfo etc output, since even a realtime root shell is 
> non-responsive for many minutes.
>
> What other debug output do you suggest to get, to find out why ext4 inodes 
> are pinned?

Important detail: one of the filesystems contains *huge* maildirs, 
containing hundreds of thousands of messages.


Dimitris

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/