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Message-ID: <1291255341.12777.115.camel@sli10-conroe> Date: Thu, 02 Dec 2010 10:02:21 +0800 From: Shaohua Li <shaohua.li@...el.com> To: lkml <linux-kernel@...r.kernel.org> Cc: "hpa@...or.com" <hpa@...or.com>, Andrew Morton <akpm@...ux-foundation.org>, sam@...nborg.org, eric.dumazet@...il.com Subject: [patch 1/3]make readmostly section correctly align readmostly section should end at cache line aligned address, otherwise the last several data might share cachline with other data and make the readmostly data still have cache bounce. For example, in ia64, secpath_cachep is the last readmostly data, and it shares cacheline with init_uts_ns. a000000100e80480 d secpath_cachep a000000100e80488 D init_uts_ns Signed-off-by: Shaohua Li <shaohua.li@...el.com> --- include/asm-generic/vmlinux.lds.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) Index: linux/include/asm-generic/vmlinux.lds.h =================================================================== --- linux.orig/include/asm-generic/vmlinux.lds.h 2010-12-01 16:49:48.000000000 +0800 +++ linux/include/asm-generic/vmlinux.lds.h 2010-12-02 09:22:32.000000000 +0800 @@ -192,7 +192,8 @@ #define READ_MOSTLY_DATA(align) \ . = ALIGN(align); \ - *(.data..read_mostly) + *(.data..read_mostly) \ + . = ALIGN(align); #define CACHELINE_ALIGNED_DATA(align) \ . = ALIGN(align); \ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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