linux-kernel - Re: [PATCH 4/5] mm/hotplug: Avoid RCU stalls when removing large amounts of memory

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: <20190617154923.GB2407@linux>
Date:   Mon, 17 Jun 2019 17:49:23 +0200
From:   Oscar Salvador <osalvador@...e.de>
To:     Alastair D'Silva <alastair@...ilva.org>
Cc:     'Michal Hocko' <mhocko@...nel.org>,
        'Alastair D'Silva' <alastair@....ibm.com>,
        'Arun KS' <arunks@...eaurora.org>,
        'Mukesh Ojha' <mojha@...eaurora.org>,
        'Logan Gunthorpe' <logang@...tatee.com>,
        'Wei Yang' <richard.weiyang@...il.com>,
        'Peter Zijlstra' <peterz@...radead.org>,
        'Ingo Molnar' <mingo@...nel.org>, linux-mm@...ck.org,
        'Qian Cai' <cai@....pw>,
        'Thomas Gleixner' <tglx@...utronix.de>,
        'Andrew Morton' <akpm@...ux-foundation.org>,
        'Mike Rapoport' <rppt@...ux.vnet.ibm.com>,
        'Baoquan He' <bhe@...hat.com>,
        'David Hildenbrand' <david@...hat.com>,
        'Josh Poimboeuf' <jpoimboe@...hat.com>,
        'Pavel Tatashin' <pasha.tatashin@...een.com>,
        'Juergen Gross' <jgross@...e.com>,
        'Oscar Salvador' <osalvador@...e.com>,
        'Jiri Kosina' <jkosina@...e.cz>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/5] mm/hotplug: Avoid RCU stalls when removing large
 amounts of memory

On Mon, Jun 17, 2019 at 05:57:16PM +1000, Alastair D'Silva wrote:
> I was getting stalls when removing ~1TB of memory.

Would you mind sharing one of those stalls-splats?
I am bit spectic here because as I Michal pointed out, we do cond_resched
once per section removed.

-- 
Oscar Salvador
SUSE L3