On 2/3/2021 1:11 PM, Chuck Lever wrote:
On Feb 3, 2021, at 1:09 PM, Tom Talpey <tom@xxxxxxxxxx> wrote:
This looks good, but the earlier 1/6 patch depends on the offset_in_page
conversion in rpcrdma_convert_kvec.
I don't think it does... sg_set_buf() handles the offset_in_page() calculation
in that case.
Ah, ok. And offset_in_page can be applied repeatedly, as well.
Tom.
Won't that complicate any bisection?
Reviewed-By: Tom Talpey <tom@xxxxxxxxxx>
On 2/3/2021 11:24 AM, Chuck Lever wrote:
Clean up so that offset_in_page() is invoked less often in the
most common case, which is mapping xdr->pages.
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
net/sunrpc/xprtrdma/frwr_ops.c | 8 +++-----
net/sunrpc/xprtrdma/rpc_rdma.c | 4 ++--
net/sunrpc/xprtrdma/xprt_rdma.h | 2 +-
3 files changed, 6 insertions(+), 8 deletions(-)
diff --git a/net/sunrpc/xprtrdma/frwr_ops.c b/net/sunrpc/xprtrdma/frwr_ops.c
index 13a50f77dddb..766a1048a48a 100644
--- a/net/sunrpc/xprtrdma/frwr_ops.c
+++ b/net/sunrpc/xprtrdma/frwr_ops.c
@@ -306,16 +306,14 @@ struct rpcrdma_mr_seg *frwr_map(struct rpcrdma_xprt *r_xprt,
if (nsegs > ep->re_max_fr_depth)
nsegs = ep->re_max_fr_depth;
for (i = 0; i < nsegs;) {
- sg_set_page(&mr->mr_sg[i],
- seg->mr_page,
- seg->mr_len,
- offset_in_page(seg->mr_offset));
+ sg_set_page(&mr->mr_sg[i], seg->mr_page,
+ seg->mr_len, seg->mr_offset);
++seg;
++i;
if (ep->re_mrtype == IB_MR_TYPE_SG_GAPS)
continue;
- if ((i < nsegs && offset_in_page(seg->mr_offset)) ||
+ if ((i < nsegs && seg->mr_offset) ||
offset_in_page((seg-1)->mr_offset + (seg-1)->mr_len))
break;
}
diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index 529adb6ad4db..b3e66b8f65ab 100644
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -215,7 +215,7 @@ rpcrdma_convert_kvec(struct kvec *vec, struct rpcrdma_mr_seg *seg,
{
if (vec->iov_len) {
seg->mr_page = virt_to_page(vec->iov_base);
- seg->mr_offset = vec->iov_base;
+ seg->mr_offset = offset_in_page(vec->iov_base);
seg->mr_len = vec->iov_len;
++seg;
++(*n);
@@ -248,7 +248,7 @@ rpcrdma_convert_iovs(struct rpcrdma_xprt *r_xprt, struct xdr_buf *xdrbuf,
page_base = offset_in_page(xdrbuf->page_base);
while (len) {
seg->mr_page = *ppages;
- seg->mr_offset = (char *)page_base;
+ seg->mr_offset = page_base;
seg->mr_len = min_t(u32, PAGE_SIZE - page_base, len);
len -= seg->mr_len;
++ppages;
diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h
index 02971e183989..ed1c5444fb9d 100644
--- a/net/sunrpc/xprtrdma/xprt_rdma.h
+++ b/net/sunrpc/xprtrdma/xprt_rdma.h
@@ -287,7 +287,7 @@ enum {
struct rpcrdma_mr_seg {
u32 mr_len; /* length of segment */
struct page *mr_page; /* underlying struct page */
- char *mr_offset; /* IN: page offset, OUT: iova */
+ u64 mr_offset; /* IN: page offset, OUT: iova */
};
/* The Send SGE array is provisioned to send a maximum size
--
Chuck Lever
