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Diffstat (limited to 'Documentation/block/queue-sysfs.txt')
| -rw-r--r-- | Documentation/block/queue-sysfs.txt | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/block/queue-sysfs.txt b/Documentation/block/queue-sysfs.txt index d8147b336c3..6518a55273e 100644 --- a/Documentation/block/queue-sysfs.txt +++ b/Documentation/block/queue-sysfs.txt @@ -38,6 +38,13 @@ read or write requests. Note that the total allocated number may be twice this amount, since it applies only to reads or writes (not the accumulated sum). +To avoid priority inversion through request starvation, a request +queue maintains a separate request pool per each cgroup when +CONFIG_BLK_CGROUP is enabled, and this parameter applies to each such +per-block-cgroup request pool. IOW, if there are N block cgroups, +each request queue may have upto N request pools, each independently +regulated by nr_requests. + read_ahead_kb (RW) ------------------ Maximum number of kilobytes to read-ahead for filesystems on this block |