[lkml]   [2018]   [Sep]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [Patch v7 21/22] CIFS: SMBD: Upper layer performs SMB read via RDMA write through memory registration
Hi Tom,

>> I just tested that setting:
>> mr->iova &= (PAGE_SIZE - 1);
>> mr->iova |= 0xFFFFFFFF00000000;
>> after the ib_map_mr_sg() and before doing the IB_WR_REG_MR, seems to
>> work.
> Good! As you know, we were concerned about it after seeing that
> the ib_dma_map_sg() code was unconditionally setting it to the
> dma_mapped address. By salting those FFFF's with varying data,
> this should give your FRWR regions stronger integrity in addition
> to not leaking kernel "addresses" to the wire.

Just wondering... Isn't the thing we use called FRMR?


[unhandled content-type:application/pgp-signature]
 \ /
  Last update: 2018-09-23 23:25    [W:0.104 / U:0.336 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site