<html> <head> <style></style></head> <body class='hmmessage'><div dir='ltr'>hi<BR>We are devloping an md driver that does optimized virtualiztion for SSDs.<BR>We store some metadata on the ssds.<BR>Everything works great when working directly above the SSDs.<BR>When we virtualize over md, we have synch isssues.<BR>The simple test formats volume meta data on the md.<BR>Then unload the module and reload.<BR>We try to read back the volume, but the checksomes comes back bad.<BR> <BR>If I repeat the operation a few more times,(just the part that tries to read back the meta data),<BR>It is finally ends up succesfully. and from there on it is always successfull.<BR>I figured there's some sort of cache that needs to be flushed..<BR>I tried flushing the md, flushing every write, nothing solved the issue.<BR> <BR>Any help greatly apreciated.<BR>Thanks<BR>-Gili <BR> </div></body> </html>