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| author | Andy Grover <andy.grover@oracle.com> | 2010-05-24 20:12:41 -0700 |
|---|---|---|
| committer | Andy Grover <andy.grover@oracle.com> | 2010-09-08 18:15:20 -0700 |
| commit | 0b088e003ccf316a76c51be5dec2d70b93be3be8 (patch) | |
| tree | 76fb8b9ab49729a97e137b73bbf4e12b65cde89d /net/rds/ib.h | |
| parent | fc19de38be924728fea76026c0d1a6c4b6156084 (diff) | |
| download | linux-0b088e003ccf316a76c51be5dec2d70b93be3be8.tar.bz2 | |
RDS: Use page_remainder_alloc() for recv bufs
Instead of splitting up a page into RDS_FRAG_SIZE chunks
ourselves, ask rds_page_remainder_alloc() to do it. While it
is possible PAGE_SIZE > FRAG_SIZE, on x86en it isn't, so having
duplicate "carve up a page into buffers" code seems excessive.
The other modification this spawns is the use of a single
struct scatterlist in rds_page_frag instead of a bare page ptr.
This causes verbosity to increase in some places, and decrease
in others.
Finally, I decided to unify the lifetimes and alloc/free of
rds_page_frag and its page. This is a nice simplification in itself,
but will be extra-nice once we come to adding cmason's recycling
patch.
Signed-off-by: Andy Grover <andy.grover@oracle.com>
Diffstat (limited to 'net/rds/ib.h')
| -rw-r--r-- | net/rds/ib.h | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/net/rds/ib.h b/net/rds/ib.h index 282ec69fe282..9bb7a7412a44 100644 --- a/net/rds/ib.h +++ b/net/rds/ib.h @@ -28,13 +28,9 @@ extern struct list_head rds_ib_devices; * try and minimize the amount of memory tied up both the device and * socket receive queues. */ -/* page offset of the final full frag that fits in the page */ -#define RDS_PAGE_LAST_OFF (((PAGE_SIZE / RDS_FRAG_SIZE) - 1) * RDS_FRAG_SIZE) struct rds_page_frag { struct list_head f_item; - struct page *f_page; - unsigned long f_offset; - dma_addr_t f_mapped; + struct scatterlist f_sg; }; struct rds_ib_incoming { @@ -107,7 +103,6 @@ struct rds_ib_connection { struct rds_header *i_recv_hdrs; u64 i_recv_hdrs_dma; struct rds_ib_recv_work *i_recvs; - struct rds_page_frag i_frag; u64 i_ack_recv; /* last ACK received */ /* sending acks */ |