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Arnaldo Carvalho de Melo 4e7e5cfe38 [INET6]: Reorganize struct inet6_dev to save 8 bytes 
And make it a multiple of a 64 bytes, reducing cacheline trashing:

Before:

[acme@doppio net-2.6]$ pahole -C inet6_dev net/dccp/ipv6.o
struct inet6_dev {
	<SNIP>
	long unsigned int          mc_maxdelay;          /*    48     8 */
	unsigned char              mc_qrv;               /*    56     1 */
	unsigned char              mc_gq_running;        /*    57     1 */
	unsigned char              mc_ifc_count;         /*    58     1 */

	/* XXX 5 bytes hole, try to pack */

	/* --- cacheline 1 boundary (64 bytes) --- */
	struct timer_list          mc_gq_timer;          /*    64    48 */
	<SNIP>
	__u32                      if_flags;             /*   180     4 */
	int                        dead;                 /*   184     4 */
	u8                         rndid[8];             /*   188     8 */

	/* XXX 4 bytes hole, try to pack */

	/* --- cacheline 3 boundary (192 bytes) was 8 bytes ago --- */
	struct timer_list          regen_timer;          /*   200    48 */

	<SNIP>

	/* size: 456, cachelines: 8 */
	/* sum members: 447, holes: 2, sum holes: 9 */
	/* last cacheline: 8 bytes */
};

After:

net-2.6/net/ipv6/af_inet6.c:
  struct inet6_dev |   -8
 1 struct changed

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-02-03 04:28:52 -08:00
..
acpi ACPI: Separate invocations of _GTS and _BFS from _PTS and _WAK 2008-02-01 18:30:56 -05:00
asm-alpha [NET]: Introducing socket mark socket option. 2008-01-31 19:27:19 -08:00
asm-arm USB: at91_udc uses generic GPIO calls; minor cleanup 2008-02-01 14:35:01 -08:00
asm-avr32 [NET]: Introducing socket mark socket option. 2008-01-31 19:27:19 -08:00
asm-blackfin [NET]: Introducing socket mark socket option. 2008-01-31 19:27:19 -08:00
asm-cris [NET]: Introducing socket mark socket option. 2008-01-31 19:27:19 -08:00
asm-frv [NET]: Introducing socket mark socket option. 2008-01-31 19:27:19 -08:00
asm-generic asm-generic/tlb.h: build fix 2008-01-31 22:05:48 +01:00
asm-h8300 [NET]: Introducing socket mark socket option. 2008-01-31 19:27:19 -08:00
asm-ia64 [NET]: Introducing socket mark socket option. 2008-01-31 19:27:19 -08:00
asm-m32r [NET]: Introducing socket mark socket option. 2008-01-31 19:27:19 -08:00
asm-m68k [NET]: Introducing socket mark socket option. 2008-01-31 19:27:19 -08:00
asm-m68knommu m68knommu: remove unused CONFIG_DISKtel symbol 2008-02-01 21:00:01 +11:00
asm-mips au1xxx-ide: use hwif->dev 2008-02-01 23:09:31 +01:00
asm-parisc [NET]: Introducing socket mark socket option. 2008-01-31 19:27:19 -08:00
asm-powerpc [NET]: Introducing socket mark socket option. 2008-01-31 19:27:19 -08:00
asm-ppc
asm-s390 [NET]: Introducing socket mark socket option. 2008-01-31 19:27:19 -08:00
asm-sh [NET]: Introducing socket mark socket option. 2008-01-31 19:27:19 -08:00
asm-sparc [NET]: Introducing socket mark socket option. 2008-01-31 19:27:19 -08:00
asm-sparc64 [NET]: Introducing socket mark socket option. 2008-01-31 19:27:19 -08:00
asm-um git-x86: unbreak UML 2008-01-30 13:32:38 +01:00
asm-v850 [NET]: Introducing socket mark socket option. 2008-01-31 19:27:19 -08:00
asm-x86 Merge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86 2008-02-02 08:27:50 +11:00
asm-xtensa [NET]: Introducing socket mark socket option. 2008-01-31 19:27:19 -08:00
crypto
keys
linux PHYLIB: Locking fixes for PHY I/O potentially sleeping 2008-02-03 04:28:41 -08:00
math-emu
media
mtd
net [INET6]: Reorganize struct inet6_dev to save 8 bytes 2008-02-03 04:28:52 -08:00
pcmcia
rdma
rxrpc
scsi [SCSI] scsi_debug: add XDWRITEREAD_10 support 2008-01-30 13:14:25 -06:00
sound [ALSA] version 1.0.16rc2 2008-01-31 17:40:18 +01:00
video
xen x86: page.h: make pte_t a union to always include 2008-01-30 13:32:57 +01:00
Kbuild