staging/lustre/obdclass: Move AT controls from sysctl to sysfs

Adaptive Timeouts controls are being moved from /proc/sys/lustre
to /sys/fs/lustre

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/lustre/lustre/obdclass/linux/linux-sysctl.c b/drivers/staging/lustre/lustre/obdclass/linux/linux-sysctl.c
index 6af1cb2..82b3c39 100644 (file)
--- a/drivers/staging/lustre/lustre/obdclass/linux/linux-sysctl.c
+++ b/drivers/staging/lustre/lustre/obdclass/linux/linux-sysctl.c
@@ -138,44 +138,14 @@ LUSTRE_RW_ATTR(max_dirty_mb);
 LUSTRE_STATIC_UINT_ATTR(debug_peer_on_timeout, &obd_debug_peer_on_timeout);
 LUSTRE_STATIC_UINT_ATTR(dump_on_timeout, &obd_dump_on_timeout);
 LUSTRE_STATIC_UINT_ATTR(dump_on_eviction, &obd_dump_on_eviction);
+LUSTRE_STATIC_UINT_ATTR(at_min, &at_min);
+LUSTRE_STATIC_UINT_ATTR(at_max, &at_max);
+LUSTRE_STATIC_UINT_ATTR(at_extra, &at_extra);
+LUSTRE_STATIC_UINT_ATTR(at_early_margin, &at_early_margin);
+LUSTRE_STATIC_UINT_ATTR(at_history, &at_history);
 
 #ifdef CONFIG_SYSCTL
 static struct ctl_table obd_table[] = {
-       {
-               .procname = "at_min",
-               .data     = &at_min,
-               .maxlen   = sizeof(int),
-               .mode     = 0644,
-               .proc_handler = &proc_dointvec,
-       },
-       {
-               .procname = "at_max",
-               .data     = &at_max,
-               .maxlen   = sizeof(int),
-               .mode     = 0644,
-               .proc_handler = &proc_dointvec,
-       },
-       {
-               .procname = "at_extra",
-               .data     = &at_extra,
-               .maxlen   = sizeof(int),
-               .mode     = 0644,
-               .proc_handler = &proc_dointvec,
-       },
-       {
-               .procname = "at_early_margin",
-               .data     = &at_early_margin,
-               .maxlen   = sizeof(int),
-               .mode     = 0644,
-               .proc_handler = &proc_dointvec,
-       },
-       {
-               .procname = "at_history",
-               .data     = &at_history,
-               .maxlen   = sizeof(int),
-               .mode     = 0644,
-               .proc_handler = &proc_dointvec,
-       },
        {}
 };
 
@@ -197,6 +167,11 @@ static struct attribute *lustre_attrs[] = {
        &lustre_sattr_debug_peer_on_timeout.u.attr,
        &lustre_sattr_dump_on_timeout.u.attr,
        &lustre_sattr_dump_on_eviction.u.attr,
+       &lustre_sattr_at_min.u.attr,
+       &lustre_sattr_at_max.u.attr,
+       &lustre_sattr_at_extra.u.attr,
+       &lustre_sattr_at_early_margin.u.attr,
+       &lustre_sattr_at_history.u.attr,
        NULL,
 };
 

diff --git a/drivers/staging/lustre/sysfs-fs-lustre b/drivers/staging/lustre/sysfs-fs-lustre
index ea9982b..873e2cf 100644 (file)
--- a/drivers/staging/lustre/sysfs-fs-lustre
+++ b/drivers/staging/lustre/sysfs-fs-lustre
@@ -90,6 +90,59 @@ Description:
                This is useful if yout debug buffer typically rolls over
                 by the time you notice the eviction event.
 
+What:          /sys/fs/lustre/at_min
+Date:          July 2015
+Contact:       "Oleg Drokin" <oleg.drokin@intel.com>
+Description:
+               Controls minimum adaptive timeout in seconds. If you encounter
+               a case where clients timeout due to server-reported processing
+               time being too short, you might consider increasing this value.
+               One common case of this if the underlying network has
+               unpredictable long delays.
+               Default: 0
+
+What:          /sys/fs/lustre/at_max
+Date:          July 2015
+Contact:       "Oleg Drokin" <oleg.drokin@intel.com>
+Description:
+               Controls maximum adaptive timeout in seconds. If at_max timeout
+               is reached for an RPC, the RPC will time out.
+               Some genuinuely slow network hardware might warrant increasing
+               this value.
+               Setting this value to 0 disables Adaptive Timeouts
+               functionality and old-style obd_timeout value is then used.
+               Default: 600
+
+What:          /sys/fs/lustre/at_extra
+Date:          July 2015
+Contact:       "Oleg Drokin" <oleg.drokin@intel.com>
+Description:
+               Controls how much extra time to request for unfinished requests
+               in processing in seconds. Normally a server-side parameter, it
+               is also used on the client for responses to various LDLM ASTs
+               that are handled with a special server thread on the client.
+               This is a way for the servers to ask the clients not to time
+               out the request that reached current servicing time estimate
+               yet and give it some more time.
+               Default: 30
+
+What:          /sys/fs/lustre/at_early_margin
+Date:          July 2015
+Contact:       "Oleg Drokin" <oleg.drokin@intel.com>
+Description:
+               Controls when to send the early reply for requests that are
+               about to timeout as an offset to the estimated service time in
+               seconds..
+               Default: 5
+
+What:          /sys/fs/lustre/at_history
+Date:          July 2015
+Contact:       "Oleg Drokin" <oleg.drokin@intel.com>
+Description:
+               Controls for how many seconds to remember slowest events
+               encountered by adaptive timeouts code.
+               Default: 600
+
 What:          /sys/fs/lustre/llite/<fsname>-<uuid>/blocksize
 Date:          May 2015
 Contact:       "Oleg Drokin" <oleg.drokin@intel.com>