diff options
| author | Olof Johansson <olof@lixom.net> | 2013-01-16 19:58:08 -0800 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2013-01-16 19:58:58 -0800 |
| commit | 5046e385b4426e229a6beb4bce480762af91a6fc (patch) | |
| tree | 65b4bff2c913a18840b3c58892853d51b942ac43 /drivers/net/xen-netfront.c | |
| parent | a73b59c51ab288d81b515b504790267f594884b8 (diff) | |
| parent | b86dc0d8c12bbb9fed3f392c284bdc7114ce00c1 (diff) | |
| download | lwn-5046e385b4426e229a6beb4bce480762af91a6fc.tar.gz lwn-5046e385b4426e229a6beb4bce480762af91a6fc.zip | |
Merge branch 'v3.8-samsung-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into fixes
From Kukjin Kim:
That branch fixes build error for S3C24XX/S3C64xx. And corrects dw-mshc
properties on EXYNOS5 DT and fixes IRQ mapping on Cragganmore board.
* 'v3.8-samsung-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
ARM: S3C64XX: Fix up IRQ mapping for balblair on Cragganmore
ARM: dts: correct the dw-mshc timing properties as per binding
ARM: S3C64XX: Fix build error with CONFIG_S3C_DEV_FB disabled
+ Linux 3.8-rc3
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'drivers/net/xen-netfront.c')
| -rw-r--r-- | drivers/net/xen-netfront.c | 27 |
1 files changed, 4 insertions, 23 deletions
diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c index c26e28b4bd9f..7ffa43bd7cf9 100644 --- a/drivers/net/xen-netfront.c +++ b/drivers/net/xen-netfront.c @@ -1015,29 +1015,10 @@ err: i = xennet_fill_frags(np, skb, &tmpq); /* - * Truesize approximates the size of true data plus - * any supervisor overheads. Adding hypervisor - * overheads has been shown to significantly reduce - * achievable bandwidth with the default receive - * buffer size. It is therefore not wise to account - * for it here. - * - * After alloc_skb(RX_COPY_THRESHOLD), truesize is set - * to RX_COPY_THRESHOLD + the supervisor - * overheads. Here, we add the size of the data pulled - * in xennet_fill_frags(). - * - * We also adjust for any unused space in the main - * data area by subtracting (RX_COPY_THRESHOLD - - * len). This is especially important with drivers - * which split incoming packets into header and data, - * using only 66 bytes of the main data area (see the - * e1000 driver for example.) On such systems, - * without this last adjustement, our achievable - * receive throughout using the standard receive - * buffer size was cut by 25%(!!!). - */ - skb->truesize += skb->data_len - RX_COPY_THRESHOLD; + * Truesize is the actual allocation size, even if the + * allocation is only partially used. + */ + skb->truesize += PAGE_SIZE * skb_shinfo(skb)->nr_frags; skb->len += skb->data_len; if (rx->flags & XEN_NETRXF_csum_blank) |