Date: Tue, 8 Oct 2013 01:38:25 +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: r256132 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs Message-ID: <201310080138.r981cPcT048197@svn.freebsd.org>
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Author: delphij Date: Tue Oct 8 01:38:24 2013 New Revision: 256132 URL: http://svnweb.freebsd.org/changeset/base/256132 Log: Improve lzjb decompress performance by reorganizing the code to tighten the copy loop. Submitted by: Denis Ahrens <denis h3q com> MFC after: 2 weeks Approved by: re (gjb) Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/lzjb.c Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/lzjb.c ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/lzjb.c Mon Oct 7 22:30:03 2013 (r256131) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/lzjb.c Tue Oct 8 01:38:24 2013 (r256132) @@ -117,7 +117,9 @@ lzjb_decompress(void *s_start, void *d_s src += 2; if ((cpy = dst - offset) < (uchar_t *)d_start) return (-1); - while (--mlen >= 0 && dst < d_end) + if (mlen > (d_end - dst)) + mlen = d_end - dst; + while (--mlen >= 0) *dst++ = *cpy++; } else { *dst++ = *src++;
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