Messages in this thread Patch in this message | | | Date | Fri, 07 May 2004 17:22:24 +1000 | From | Greg Banks <> | Subject | Re: PATCH [NFSd] NFSv3/TCP |
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Neil Brown wrote: > > There was once a patch floating around which allowed a larger > NFSSVC_MAXBLKSIZE on architectures with large page sizes, but it never > got properly submitted I think.
Then please consider this a resend. I'll appreciate any guidance about proper submission.
This patch has been in SGI's ProPack kernel for 6 months and resulted in a significant improvement in NFS throughput at a number of customer sites.
--- /usr/tmp/TmpDir.16250-0/linux/linux/include/linux/nfsd/const.h_1.5 Fri May 7 17:20:22 2004 +++ /usr/tmp/TmpDir.16250-0/linux/linux/include/linux/nfsd/const.h Fri May 7 17:20:22 2004 @@ -12,6 +12,7 @@ #include <linux/nfs.h> #include <linux/nfs2.h> #include <linux/nfs3.h> +#include <asm/page.h> /* * Maximum protocol version supported by knfsd @@ -19,9 +20,16 @@ #define NFSSVC_MAXVERS 3 /* - * Maximum blocksize supported by daemon currently at 8K + * Maximum blocksize supported by daemon. We want the largest + * value which 1) fits in a UDP datagram less some headers + * 2) is a multiple of page size 3) can be successfully kmalloc()ed + * by each nfsd. */ -#define NFSSVC_MAXBLKSIZE (8*1024) +#if PAGE_SIZE > (16*1024) +#define NFSSVC_MAXBLKSIZE (32*1024) +#else +#define NFSSVC_MAXBLKSIZE (2*PAGE_SIZE) +#endif #ifdef __KERNEL__
Greg. -- Greg Banks, R&D Software Engineer, SGI Australian Software Group. I don't speak for SGI. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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