From 0871714e08fed7ba66cadad11b2e4f85a9dc9b96 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Mon, 28 Jan 2008 11:38:15 +0100 Subject: [PATCH] cfq-iosched: relax IOPRIO_CLASS_IDLE restrictions Currently you must be root to set idle io prio class on a process. This is due to the fact that the idle class is implemented as a true idle class, meaning that it will not make progress if someone else is requesting disk access. Unfortunately this means that it opens DOS opportunities by locking down file system resources, hence it is root only at the moment. This patch relaxes the idle class a little, by removing the truly idle part (which entals a grace period with associated timer). The modifications make the idle class as close to zero impact as can be done while still guarenteeing progress. This means we can relax the root only criteria as well. Signed-off-by: Jens Axboe --- Reading git-format-patch failed