Date: Wed, 3 Oct 2007 16:48:00 -0700 (PDT) From: Jeff Roberson <jroberson@chesapeake.net> To: John Baldwin <jhb@FreeBSD.org> Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/fs/devfs devfs_vnops.c src/sys/fs/fifofs fifo_vnops.c src/sys/kern uipc_usrreq.c vfs_vnops.c src/sys/vm vnode_pager.c Message-ID: <20071003164642.B615@10.0.0.1> In-Reply-To: <200710032106.l93L65bv095725@repoman.freebsd.org> References: <200710032106.l93L65bv095725@repoman.freebsd.org>
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On Wed, 3 Oct 2007, John Baldwin wrote: > jhb 2007-10-03 21:06:05 UTC > > FreeBSD src repository > > Modified files: (Branch: RELENG_6) > sys/fs/devfs devfs_vnops.c > sys/fs/fifofs fifo_vnops.c > sys/kern uipc_usrreq.c vfs_vnops.c > sys/vm vnode_pager.c > Log: > MFC: Always use an exclusive lock on the leaf vnode during an open() when > shared lookups are enabled. This closes a few races including a race where > concurrent opens of a fifo could result in different v_fifoinfo structures > in different threads. Long term we should really look for a better solution to this problem. There are a number of was to improve snapshots in ffs by fixing shared locking. > > Revision Changes Path > 1.114.2.15 +1 -0 src/sys/fs/devfs/devfs_vnops.c > 1.113.2.20 +1 -1 src/sys/fs/fifofs/fifo_vnops.c > 1.155.2.23 +1 -1 src/sys/kern/uipc_usrreq.c > 1.233.2.7 +2 -2 src/sys/kern/vfs_vnops.c > 1.221.2.9 +3 -3 src/sys/vm/vnode_pager.c >
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