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  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]
Date:	Fri, 29 Jul 2016 08:25:16 -0400
From:	Tejun Heo <>
To:	Saeed Mahameed <>
Cc:	Bhaktipriya Shridhar <>,
	Saeed Mahameed <>,
	Matan Barak <>,
	Leon Romanovsky <>,
	Linux Netdev List <>,,
	linux-kernel <>
Subject: Re: [RFC] net/mlx5_core/en_main: Remove deprecated create_workqueue


On Fri, Jul 29, 2016 at 01:30:05AM +0300, Saeed Mahameed wrote:
> > Are the workitems being used on a memory reclaim path?
> do you mean they need to allocate memory ?

It's a bit convoluted.  A workqueue needs WQ_MEM_RECLAIM flag to be
guaranteed forward progress under memory pressure, so any workqueue
which may be depended upon during memory reclaim should have the flag
set; otherwise, the system can deadlock (try to reclaim memory, hits
the wq which can't make forward progress due to lack of memory).  For
network devices, the requirement comes from block-over-network or nfs
which can be involved in memory reclaim.



Powered by blists - more mailing lists