Re: [mmots-2016-06-09-16-49] sleeping function called from slab_alloc()
From: Michal Hocko <mhocko@kernel.org>
Date: 2016-06-13 10:47:38
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linux-mm, lkml
On Fri 10-06-16 14:59:16, Andrew Morton wrote:
On Fri, 10 Jun 2016 11:55:54 +0200 mhocko [off-list ref] wrote:quoted
On 2016-06-10 11:50, Sergey Senozhatsky wrote:quoted
Hello, forked from http://marc.info/?l=linux-mm&m=146553910928716&w=2 new_slab()->BUG->die()->exit_signals() can be called from atomic context: local IRQs disabled in slab_alloc().I have sent a patch to drop the BUG() from that path today. It is just too aggressive way to react to a non-critical bug. See http://lkml.kernel.org/r/1465548200-11384-2-git-send-email-mhocko@kernel.orgDoesn't this simply mean that Sergey's workload will blurt a pr_warn() rather than a BUG()? That still needs fixing. Confused.
Yes that should be fixed by http://lkml.kernel.org/r/20160610074223.GC32285@dhcp22.suse.cz which prevents from using a wrong GFP... -- Michal Hocko SUSE Labs