Date: Thu, 7 May 2009 20:57:06 +0000 (UTC) From: Kip Macy <kmacy@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r191902 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs Message-ID: <200905072057.n47Kv6wW067998@svn.freebsd.org>
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Author: kmacy Date: Thu May 7 20:57:06 2009 New Revision: 191902 URL: http://svn.freebsd.org/changeset/base/191902 Log: Allow the VM to provide backpressure on the ARC cache as it does on Solaris. Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c Thu May 7 20:39:23 2009 (r191901) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c Thu May 7 20:57:06 2009 (r191902) @@ -131,6 +131,8 @@ #include <sys/kstat.h> #include <sys/sdt.h> +#include <vm/vm_pageout.h> + static kmutex_t arc_reclaim_thr_lock; static kcondvar_t arc_reclaim_thr_cv; /* used to signal reclaim thr */ static uint8_t arc_thread_exit; @@ -1809,6 +1811,13 @@ arc_reclaim_needed(void) #ifdef _KERNEL + /* + * If pages are needed or we're within 2048 pages + * of needing to page need to reclaim + */ + if (vm_pages_needed || (vm_paging_target() > -2048)) + return (1); + if (needfree) return (1);
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