Date: Fri, 17 Mar 2017 12:34:57 +0000 (UTC) From: Steven Hartland <smh@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r315449 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs Message-ID: <201703171234.v2HCYvgd026429@repo.freebsd.org>
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Author: smh Date: Fri Mar 17 12:34:57 2017 New Revision: 315449 URL: https://svnweb.freebsd.org/changeset/base/315449 Log: Reduce ARC fragmentation threshold As ZFS can request up to SPA_MAXBLOCKSIZE memory block e.g. during zfs recv, update the threshold at which we start agressive reclamation to use SPA_MAXBLOCKSIZE (16M) instead of the lower zfs_max_recordsize which defaults to 1M. PR: 194513 Reviewed by: avg, mav MFC after: 1 month Sponsored by: Multiplay Differential Revision: https://reviews.freebsd.org/D10012 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 Fri Mar 17 12:34:56 2017 (r315448) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c Fri Mar 17 12:34:57 2017 (r315449) @@ -3978,7 +3978,7 @@ arc_available_memory(void) * Start aggressive reclamation if too little sequential KVA left. */ if (lowest > 0) { - n = (vmem_size(heap_arena, VMEM_MAXFREE) < zfs_max_recordsize) ? + n = (vmem_size(heap_arena, VMEM_MAXFREE) < SPA_MAXBLOCKSIZE) ? -((int64_t)vmem_size(heap_arena, VMEM_ALLOC) >> 4) : INT64_MAX; if (n < lowest) {
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