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| author | Jens Axboe <jens.axboe@oracle.com> | 2008-01-28 11:38:15 +0100 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-01-28 11:38:15 +0100 |
| commit | 0871714e08fed7ba66cadad11b2e4f85a9dc9b96 (patch) | |
| tree | 3b0bcb433294bb144b778ae97296ad4d8626ad47 /fs/ioprio.c | |
| parent | fadad878cc0640cc9cd5569998bf54b693f7b38b (diff) | |
| download | lwn-0871714e08fed7ba66cadad11b2e4f85a9dc9b96.tar.gz lwn-0871714e08fed7ba66cadad11b2e4f85a9dc9b96.zip | |
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 <jens.axboe@oracle.com>
Diffstat (limited to 'fs/ioprio.c')
| -rw-r--r-- | fs/ioprio.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/fs/ioprio.c b/fs/ioprio.c index 06b5d97c5fdd..c4a1c3c65aac 100644 --- a/fs/ioprio.c +++ b/fs/ioprio.c @@ -85,8 +85,6 @@ asmlinkage long sys_ioprio_set(int which, int who, int ioprio) break; case IOPRIO_CLASS_IDLE: - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; break; case IOPRIO_CLASS_NONE: if (data) |