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| author | David S. Miller <davem@davemloft.net> | 2008-06-17 05:25:48 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-06-17 05:25:48 +0400 |
| commit | caea902f72b053fd0c76d0d3b6b2e057beb3fc64 (patch) | |
| tree | 74e8d476b2c51480420e2ef7c9bbae249b6edbc9 /net/sched | |
| parent | 0b4419162aa6c4204843f3a13b48d9ab821d3167 (diff) | |
| parent | 65c3e4715b1b934f8dcc002d9f46b4371ca7a9b1 (diff) | |
| download | linux-caea902f72b053fd0c76d0d3b6b2e057beb3fc64.tar.xz | |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts:
drivers/net/wireless/rt2x00/Kconfig
drivers/net/wireless/rt2x00/rt2x00usb.c
net/sctp/protocol.c
Diffstat (limited to 'net/sched')
| -rw-r--r-- | net/sched/sch_htb.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c index 213071859030..2cef8f34b2cb 100644 --- a/net/sched/sch_htb.c +++ b/net/sched/sch_htb.c @@ -26,6 +26,7 @@ * and many others. thanks. */ #include <linux/module.h> +#include <linux/moduleparam.h> #include <linux/types.h> #include <linux/kernel.h> #include <linux/string.h> @@ -51,13 +52,17 @@ */ #define HTB_HSIZE 16 /* classid hash size */ -#define HTB_HYSTERESIS 1 /* whether to use mode hysteresis for speedup */ +static int htb_hysteresis __read_mostly = 0; /* whether to use mode hysteresis for speedup */ #define HTB_VER 0x30011 /* major must be matched with number suplied by TC as version */ #if HTB_VER >> 16 != TC_HTB_PROTOVER #error "Mismatched sch_htb.c and pkt_sch.h" #endif +/* Module parameter and sysfs export */ +module_param (htb_hysteresis, int, 0640); +MODULE_PARM_DESC(htb_hysteresis, "Hysteresis mode, less CPU load, less accurate"); + /* used internaly to keep status of single class */ enum htb_cmode { HTB_CANT_SEND, /* class can't send and can't borrow */ @@ -460,19 +465,21 @@ static void htb_deactivate_prios(struct htb_sched *q, struct htb_class *cl) htb_remove_class_from_row(q, cl, mask); } -#if HTB_HYSTERESIS static inline long htb_lowater(const struct htb_class *cl) { - return cl->cmode != HTB_CANT_SEND ? -cl->cbuffer : 0; + if (htb_hysteresis) + return cl->cmode != HTB_CANT_SEND ? -cl->cbuffer : 0; + else + return 0; } static inline long htb_hiwater(const struct htb_class *cl) { - return cl->cmode == HTB_CAN_SEND ? -cl->buffer : 0; + if (htb_hysteresis) + return cl->cmode == HTB_CAN_SEND ? -cl->buffer : 0; + else + return 0; } -#else -#define htb_lowater(cl) (0) -#define htb_hiwater(cl) (0) -#endif + /** * htb_class_mode - computes and returns current class mode |