Date: Thu, 14 Aug 2014 05:13:25 +0000 (UTC) From: Xin LI <delphij@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r269963 - head/sys/kern Message-ID: <201408140513.s7E5DPRb069698@svn.freebsd.org>
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Author: delphij Date: Thu Aug 14 05:13:24 2014 New Revision: 269963 URL: http://svnweb.freebsd.org/changeset/base/269963 Log: Re-instate UMA cached backend for 4K - 64K allocations. New consumers like geli(4) uses malloc(9) to allocate temporary buffers that gets free'ed shortly, causing frequent TLB shootdown as observed in hwpmc supported flame graph. Discussed with: jeff, alfred MFC after: 1 week Modified: head/sys/kern/kern_malloc.c Modified: head/sys/kern/kern_malloc.c ============================================================================== --- head/sys/kern/kern_malloc.c Thu Aug 14 05:00:45 2014 (r269962) +++ head/sys/kern/kern_malloc.c Thu Aug 14 05:13:24 2014 (r269963) @@ -120,7 +120,7 @@ static int kmemcount; #define KMEM_ZBASE 16 #define KMEM_ZMASK (KMEM_ZBASE - 1) -#define KMEM_ZMAX PAGE_SIZE +#define KMEM_ZMAX 65536 #define KMEM_ZSIZE (KMEM_ZMAX >> KMEM_ZSHIFT) static uint8_t kmemsize[KMEM_ZSIZE + 1]; @@ -151,21 +151,10 @@ struct { {1024, "1024", }, {2048, "2048", }, {4096, "4096", }, -#if PAGE_SIZE > 4096 {8192, "8192", }, -#if PAGE_SIZE > 8192 {16384, "16384", }, -#if PAGE_SIZE > 16384 {32768, "32768", }, -#if PAGE_SIZE > 32768 {65536, "65536", }, -#if PAGE_SIZE > 65536 -#error "Unsupported PAGE_SIZE" -#endif /* 65536 */ -#endif /* 32768 */ -#endif /* 16384 */ -#endif /* 8192 */ -#endif /* 4096 */ {0, NULL}, };
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