Date: Wed, 13 Mar 2013 15:20:18 +0000 (UTC) From: Attilio Rao <attilio@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r248245 - user/attilio/vmobj-readlock/sys/kern Message-ID: <201303131520.r2DFKI8r070241@svn.freebsd.org>
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Author: attilio Date: Wed Mar 13 15:20:18 2013 New Revision: 248245 URL: http://svnweb.freebsd.org/changeset/base/248245 Log: Revert read locking in brelse(). For the time being vm_page_set_invalid() requires write locking on obj. Sponsored by: EMC / Isilon storage division Modified: user/attilio/vmobj-readlock/sys/kern/vfs_bio.c Modified: user/attilio/vmobj-readlock/sys/kern/vfs_bio.c ============================================================================== --- user/attilio/vmobj-readlock/sys/kern/vfs_bio.c Wed Mar 13 15:09:00 2013 (r248244) +++ user/attilio/vmobj-readlock/sys/kern/vfs_bio.c Wed Mar 13 15:20:18 2013 (r248245) @@ -1389,7 +1389,7 @@ brelse(struct buf *bp) */ resid = bp->b_bufsize; foff = bp->b_offset; - VM_OBJECT_RLOCK(obj); + VM_OBJECT_WLOCK(obj); for (i = 0; i < bp->b_npages; i++) { int had_bogus = 0; @@ -1437,7 +1437,7 @@ brelse(struct buf *bp) resid -= PAGE_SIZE - (foff & PAGE_MASK); foff = (foff + PAGE_SIZE) & ~(off_t)PAGE_MASK; } - VM_OBJECT_RUNLOCK(obj); + VM_OBJECT_WUNLOCK(obj); if (bp->b_flags & (B_INVAL | B_RELBUF)) vfs_vmio_release(bp);
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