From mboxrd@z Thu Jan 1 00:00:00 1970 From: ralph@inputplus.co.uk (Ralph Corderoy) Date: Fri, 01 Dec 2017 23:03:02 +0000 Subject: [TUHS] signals and blocked in I/O In-Reply-To: <20171201223859.GX3924@mcvoy.com> References: <20171201154448.GL3924@mcvoy.com> <20171201161810.GM3924@mcvoy.com> <20171201172603.GO3924@mcvoy.com> <20171201223859.GX3924@mcvoy.com> Message-ID: <20171201230302.0DC351FA41@orac.inputplus.co.uk> Hi Larry, > > So OOM code kills a (random) process in hopes of freeing up some > > pages but if this process is stuck in diskIO, nothing can be freed > > and everything grinds to a halt. > > Yep, exactly. Is that because the pages have been dirty for so long they've reached the VM-writeback timeout even though there's no pressure to use them for something else? Or has that been lengthened because you don't fear power loss wiping volatile RAM? -- Cheers, Ralph. https://plus.google.com/+RalphCorderoy