philipp.reisner at linbit.com
Wed May 24 14:37:12 CEST 2006
And an other maintenance release...
* Fixed a bug where lc_del() left a list poison in an LRU chache's
hash table. The only way to trigger this bug was:
up (>>200M), primary, mkfs, resize to 200M, down, up
* DRBD now propagates the backing storage's read ahead properties
to upper layers. With devices that read very fast, this is
* GFP_KERNEL was changed to GFP_NOIO in a few places, to make it
more save against deadlocks in the memory subsystem.
The trigger for this release to happen was the enormous difference
in read performance we experienced at a customer's site.
With some nice hardware the system there achieved 320MB/sec
read performance. With drbd-0.7.18 on top of DRBD we got only
about 70MB/sec read performance, while with that modification
in 0.7.19 we can get the whole 320MB/sec out of DRBD as well.
: Dipl-Ing Philipp Reisner Tel +43-1-8178292-50 :
: LINBIT Information Technologies GmbH Fax +43-1-8178292-82 :
: Schönbrunnerstr 244, 1120 Vienna, Austria http://www.linbit.com :
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