Date: Tue, 7 Oct 2014 20:13:47 +0000 (UTC) From: Jung-uk Kim <jkim@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r272718 - head/sys/kern Message-ID: <201410072013.s97KDltI091061@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: jkim Date: Tue Oct 7 20:13:47 2014 New Revision: 272718 URL: https://svnweb.freebsd.org/changeset/base/272718 Log: Make kern.nswbuf tunable from loader. MFC after: 1 week Modified: head/sys/kern/vfs_bio.c Modified: head/sys/kern/vfs_bio.c ============================================================================== --- head/sys/kern/vfs_bio.c Tue Oct 7 19:08:02 2014 (r272717) +++ head/sys/kern/vfs_bio.c Tue Oct 7 20:13:47 2014 (r272718) @@ -667,6 +667,10 @@ bd_speedup(void) mtx_unlock(&bdlock); } +#ifndef NSWBUF_MIN +#define NSWBUF_MIN 16 +#endif + #ifdef __i386__ #define TRANSIENT_DENOM 5 #else @@ -778,11 +782,10 @@ kern_vfs_bio_buffer_alloc(caddr_t v, lon * swbufs are used as temporary holders for I/O, such as paging I/O. * We have no less then 16 and no more then 256. */ - nswbuf = max(min(nbuf/4, 256), 16); -#ifdef NSWBUF_MIN + nswbuf = min(nbuf / 4, 256); + TUNABLE_INT_FETCH("kern.nswbuf", &nswbuf); if (nswbuf < NSWBUF_MIN) nswbuf = NSWBUF_MIN; -#endif /* * Reserve space for the buffer cache buffers
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201410072013.s97KDltI091061>