Date: Fri, 17 May 2013 20:03:56 +0000 (UTC) From: Attilio Rao <attilio@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r250751 - head/sys/kern Message-ID: <201305172003.r4HK3unt000571@svn.freebsd.org>
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Author: attilio Date: Fri May 17 20:03:55 2013 New Revision: 250751 URL: http://svnweb.freebsd.org/changeset/base/250751 Log: Use readlocking now that assertions on vm_page_lookup() are relaxed. Sponsored by: EMC / Isilon storage division Reviewed by: alc Tested by: flo, pho Modified: head/sys/kern/vfs_bio.c Modified: head/sys/kern/vfs_bio.c ============================================================================== --- head/sys/kern/vfs_bio.c Fri May 17 19:37:16 2013 (r250750) +++ head/sys/kern/vfs_bio.c Fri May 17 20:03:55 2013 (r250751) @@ -2772,7 +2772,7 @@ inmem(struct vnode * vp, daddr_t blkno) size = vp->v_mount->mnt_stat.f_iosize; off = (vm_ooffset_t)blkno * (vm_ooffset_t)vp->v_mount->mnt_stat.f_iosize; - VM_OBJECT_WLOCK(obj); + VM_OBJECT_RLOCK(obj); for (toff = 0; toff < vp->v_mount->mnt_stat.f_iosize; toff += tinc) { m = vm_page_lookup(obj, OFF_TO_IDX(off + toff)); if (!m) @@ -2784,11 +2784,11 @@ inmem(struct vnode * vp, daddr_t blkno) (vm_offset_t) ((toff + off) & PAGE_MASK), tinc) == 0) goto notinmem; } - VM_OBJECT_WUNLOCK(obj); + VM_OBJECT_RUNLOCK(obj); return 1; notinmem: - VM_OBJECT_WUNLOCK(obj); + VM_OBJECT_RUNLOCK(obj); return (0); }
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