diff options
| author | Harald Hoyer <harald@redhat.com> | 2008-09-16 09:41:16 +0200 |
|---|---|---|
| committer | Harald Hoyer <harald@redhat.com> | 2008-09-16 10:38:10 +0200 |
| commit | cefaaa0dd6b2d60f674875cc8b86d5846e8033f7 (patch) | |
| tree | 7d0c98ac43be903b407366c396362ab782a2aa32 /udev | |
| parent | c0e42318dcca68d960ca1d7977af2979bc99b8aa (diff) | |
| download | initscripts-cefaaa0dd6b2d60f674875cc8b86d5846e8033f7.tar initscripts-cefaaa0dd6b2d60f674875cc8b86d5846e8033f7.tar.gz initscripts-cefaaa0dd6b2d60f674875cc8b86d5846e8033f7.tar.bz2 initscripts-cefaaa0dd6b2d60f674875cc8b86d5846e8033f7.tar.xz initscripts-cefaaa0dd6b2d60f674875cc8b86d5846e8033f7.zip | |
https://bugzilla.redhat.com/show_bug.cgi?id=437110
On System z, typical hardware setups can consist of up to several thousand I/O
devices. The current udev rules for handling these devices and the ccw_init
helper script are implemented in an insufficient way, leading to unnecessarily
high usage of memory and cpu time during system startup.
The attached patch against the initscripts-8.45.19.EL-1 source RPM reduces
this resource usage drastically by
a) fixing a number of coding problems in helper script ccw_init (the current
version creates failure indications in /dev/.udev/failed for each device)
b) restricting the ccw_init script to network devices (ccw_init is only
relevant for network devices)
Using these changes, memory consumption on an example system with ~1500
devices could be reduced by 80% (VSZ), resp. 50% (RSS) and the elapsed
duration for udev could be reduced from 19s down to 6 seconds.
Business case: with reduced memory and time consumption during startup, more
Linux images can be run with the same amount of resources.
Diffstat (limited to 'udev')
| -rw-r--r-- | udev/rules.d/55-ccw.rules | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/udev/rules.d/55-ccw.rules b/udev/rules.d/55-ccw.rules index d32f125a..dc0db663 100644 --- a/udev/rules.d/55-ccw.rules +++ b/udev/rules.d/55-ccw.rules @@ -1 +1,9 @@ -ACTION=="add", SUBSYSTEM=="ccw", RUN+="/lib/udev/ccw_init" +ACTION=="add", SUBSYSTEM=="ccw", SYSFS{cutype}=="1731/01", RUN+="/lib/udev/ccw_init" +ACTION=="add", SUBSYSTEM=="ccw", SYSFS{cutype}=="1731/05", RUN+="/lib/udev/ccw_init" +ACTION=="add", SUBSYSTEM=="ccw", SYSFS{cutype}=="1731/06", RUN+="/lib/udev/ccw_init" +ACTION=="add", SUBSYSTEM=="ccw", SYSFS{cutype}=="3088/01", RUN+="/lib/udev/ccw_init" +ACTION=="add", SUBSYSTEM=="ccw", SYSFS{cutype}=="3088/08", RUN+="/lib/udev/ccw_init" +ACTION=="add", SUBSYSTEM=="ccw", SYSFS{cutype}=="3088/60", RUN+="/lib/udev/ccw_init" +ACTION=="add", SUBSYSTEM=="ccw", SYSFS{cutype}=="3088/61", RUN+="/lib/udev/ccw_init" +ACTION=="add", SUBSYSTEM=="ccw", SYSFS{cutype}=="3088/1E", RUN+="/lib/udev/ccw_init" +ACTION=="add", SUBSYSTEM=="ccw", SYSFS{cutype}=="3088/1F", RUN+="/lib/udev/ccw_init" |