On Tue, Feb 21, 2012 at 8:13 PM, Jack David <[email protected]> wrote: > Hi All, > > I am trying to analyze the OSC-OST communication by putting some > prints in the code. Basically I want to print the data that is sent by > OSC and received by OST. But I am not able to print the correct, may > be because of I am not printing the correct buffers. Please correct me > in the following approach which I have taken. > > On the OST side, whenever the OST_WRITE request comes, following code > path is taken > > ost_brw_write() > -- target_bulk_io() > -- -- ptlrpc_start_bulk_transfer() > -- -- -- LNetGet() > > In the ptlrpc_start_bulk_transfer(), the "desc" parameter contains the > pages and that is filled into the "MD". I assume if I print those > pages at this point (before calling LNetGet()), I will not get the > data. > > Once the LNetGet() is called, the GET request will be served by lower > layer and lnet_finalize() will be invoked as a call back routine to > notify that the operation is complete. In "lnet_finalize()", I am > filtering the "msg" (passed in as parameter) with type LNET_MSG_GET to > pin point the correct "msg". This struct "msg" will contain the > "lnet_libmd_t" type of MD which will have the kiov as well as "start" > buffer. If I print that buffer, still the data is garbage. > > I would appreciate any help on this issue. > > Thanks, > J
Forgot to mention that Lustre MDS, OSS and Lustre Client are on the same machine. -- J _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
