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c4c0ce5c57
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Ilpo Järvinen c4c0ce5c57 [PKT_SCHED] RED: Fix overflow in calculation of queue average 
Overflow can occur very easily with 32 bits, e.g., with 1 second
us_idle is approx. 2^20, which leaves only 11-Wlog bits for queue
length. Since the EWMA exponent is typically around 9, queue
lengths larger than 2^2 cause overflow. Whether the affected
branch is taken when us_idle is as high as 1 second, depends on
Scell_log, but with rather reasonable configuration Scell_log is
large enough to cause p->Stab to have zero index, which always
results zero shift (typically also few other small indices result
in zero shift).

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-08-04 22:59:51 -07:00
..
acpi Pull acpi_os_allocate into test branch 2006-07-10 02:39:47 -04:00
asm-alpha [PATCH] remove set_wmb - arch removal 2006-07-14 21:56:14 -07:00
asm-arm [ARM] 3743/1: ARM: OMAP: Fix compile for OMAP 2006-08-02 14:41:39 +01:00
asm-arm26 [PATCH] remove set_wmb - arch removal 2006-07-14 21:56:14 -07:00
asm-cris [PATCH] remove set_wmb - arch removal 2006-07-14 21:56:14 -07:00
asm-frv [PATCH] remove set_wmb - arch removal 2006-07-14 21:56:14 -07:00
asm-generic [PATCH] hdrinstall: remove asm/io.h from user visibility 2006-07-14 21:53:52 -07:00
asm-h8300 [PATCH] remove set_wmb - arch removal 2006-07-14 21:56:14 -07:00
asm-i386 [PATCH] IA64: kprobe invalidate icache of jump buffer 2006-07-31 13:28:38 -07:00
asm-ia64 Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 2006-08-03 12:50:20 -07:00
asm-m32r [PATCH] remove set_wmb - arch removal 2006-07-14 21:56:14 -07:00
asm-m68k [SPARC]: Kill prom_getname, unused and not implemented properly. 2006-07-21 14:17:55 -07:00
asm-m68knommu [PATCH] remove set_wmb - arch removal 2006-07-14 21:56:14 -07:00
asm-mips [PATCH] remove set_wmb - arch removal 2006-07-14 21:56:14 -07:00
asm-parisc [PATCH] remove set_wmb - arch removal 2006-07-14 21:56:14 -07:00
asm-powerpc [PATCH] powermac: More powermac backlight fixes 2006-07-31 13:28:45 -07:00
asm-ppc [PATCH] remove set_wmb - arch removal 2006-07-14 21:56:14 -07:00
asm-s390 [S390] get_clock inline assembly. 2006-07-17 16:09:42 +02:00
asm-sh [PATCH] remove set_wmb - arch removal 2006-07-14 21:56:14 -07:00
asm-sh64 [PATCH] remove set_wmb - arch removal 2006-07-14 21:56:14 -07:00
asm-sparc [SPARC]: Fix SA_STATIC_ALLOC value. 2006-07-24 22:34:00 -07:00
asm-sparc64 [PATCH] IA64: kprobe invalidate icache of jump buffer 2006-07-31 13:28:38 -07:00
asm-um Merge git://git.infradead.org/hdrinstall-2.6 2006-07-04 12:55:45 -07:00
asm-v850 [PATCH] remove set_wmb - arch removal 2006-07-14 21:56:14 -07:00
asm-x86_64 [PATCH] IA64: kprobe invalidate icache of jump buffer 2006-07-31 13:28:38 -07:00
asm-xtensa [PATCH] remove set_wmb - arch removal 2006-07-14 21:56:14 -07:00
keys
linux Merge branch 'fixes' of git://git.linux-nfs.org/pub/linux/nfs-2.6 2006-08-04 09:56:40 -07:00
math-emu
media V4L/DVB (4316): Check __must_check warnings 2006-07-29 17:22:21 -03:00
mtd Merge git://git.infradead.org/hdrinstall-2.6 2006-07-04 12:55:45 -07:00
net [PKT_SCHED] RED: Fix overflow in calculation of queue average 2006-08-04 22:59:51 -07:00
pcmcia
rdma IB/mad: Validate MADs for spec compliance 2006-07-24 09:18:07 -07:00
rxrpc
scsi [SCSI] scsi_transport_sas: add expander backlink 2006-07-12 09:03:20 -04:00
sound [ALSA] Fix section mismatch errors in ALSA PCI drivers 2006-07-12 20:08:01 +02:00
video [PATCH] mbxfb: Add framebuffer driver for the Intel 2700G 2006-07-14 21:53:55 -07:00
Kbuild