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
| ||
|
Date: Wed, 31 Oct 2012 11:20:02 -0400 (EDT) From: Alan Stern <stern@...land.harvard.edu> To: Ming Lei <ming.lei@...onical.com> cc: Oliver Neukum <oneukum@...e.de>, <linux-kernel@...r.kernel.org>, Minchan Kim <minchan@...nel.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, "Rafael J. Wysocki" <rjw@...k.pl>, Jens Axboe <axboe@...nel.dk>, "David S. Miller" <davem@...emloft.net>, Andrew Morton <akpm@...ux-foundation.org>, <netdev@...r.kernel.org>, <linux-usb@...r.kernel.org>, <linux-pm@...r.kernel.org>, <linux-mm@...ck.org> Subject: Re: [PATCH v3 2/6] PM / Runtime: introduce pm_runtime_set[get]_memalloc_noio() On Wed, 31 Oct 2012, Ming Lei wrote: > The below idea may help the problem which 'memalloc_noio' flag isn't set during > usb_reset_device(). > > - for usb mass storage device, call pm_runtime_set_memalloc_noio(true) > inside usb_stor_probe2() and uas_probe(), and call > pm_runtime_set_memalloc_noio(false) inside uas_disconnect() > and usb_stor_disconnect(). Why would you want to do that? The probe and disconnect routines usually -- but not always -- run in the khubd thread. Surely you don't want to prevent khubd from using GFP_KERNEL? And what if probe runs in khubd but disconnect runs in a different thread? Alan Stern -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists