I am inquiring on the list if anybody knows if the latest plus kernel
includes the fixes for MD RAID-1 where it didn't pass down the
BIO_RW_SYNC flag on cloned bios.
This bug was discovered in December by the DRBD project and patches were
posted by Lars Ellenberg from that project to the LKM which were then
merged into the 2.6.19 kernel.
The bug causes severe performance penalties for applications that use
the BIO_RW_SYNC flag on block requests.
The fix is a simple 2 to 4 line change where it ORs the sync flag on the
cloned bios.
If it isn't in the plus kernel, how would one go about putting a request
to have it included?
Thanks,
Ross S. W. Walker
Information Systems Manager
Medallion Financial, Corp.
437 Madison Avenue
38th Floor
New York, NY 10022
Tel: (212) 328-2165
Fax: (212) 328-2125
WWW: http://www.medallion.com <http://www.medallion.com>
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