Author: mav Date: Sun Mar 20 23:49:58 2016 New Revision: 297092 URL: https://svnweb.freebsd.org/changeset/base/297092
Log: MFC r294794: MFV r294793: 6367 spa_config_tryenter incorrectly handles the multiple-lock case Reviewed by: Alek Pinchuk <alek.pinc...@nexenta.com> Reviewed by: Josef 'Jeff' Sipek <josef.si...@nexenta.com> Reviewed by: Prashanth Sreenivasa <prash...@gmail.com> Reviewed by: Matthew Ahrens <mahr...@delphix.com> Reviewed by: Dan McDonald <dan...@omniti.com> Reviewed by: Steven Hartland <steven.hartl...@multiplay.co.uk> Approved by: Matthew Ahrens <mahr...@delphix.com> illumos/illumos-gate@e495b6e6735b803e422025a630352ef9bba788c5 Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_misc.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_misc.c ============================================================================== --- stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_misc.c Sun Mar 20 23:48:26 2016 (r297091) +++ stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_misc.c Sun Mar 20 23:49:58 2016 (r297092) @@ -21,7 +21,7 @@ /* * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2011, 2015 by Delphix. All rights reserved. - * Copyright 2011 Nexenta Systems, Inc. All rights reserved. + * Copyright 2015 Nexenta Systems, Inc. All rights reserved. * Copyright 2013 Martin Matuska <m...@freebsd.org>. All rights reserved. * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. * Copyright 2013 Saso Kiselkov. All rights reserved. @@ -459,14 +459,16 @@ spa_config_tryenter(spa_t *spa, int lock if (rw == RW_READER) { if (scl->scl_writer || scl->scl_write_wanted) { mutex_exit(&scl->scl_lock); - spa_config_exit(spa, locks ^ (1 << i), tag); + spa_config_exit(spa, locks & ((1 << i) - 1), + tag); return (0); } } else { ASSERT(scl->scl_writer != curthread); if (!refcount_is_zero(&scl->scl_count)) { mutex_exit(&scl->scl_lock); - spa_config_exit(spa, locks ^ (1 << i), tag); + spa_config_exit(spa, locks & ((1 << i) - 1), + tag); return (0); } scl->scl_writer = curthread; _______________________________________________ svn-src-stable-10@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-stable-10 To unsubscribe, send any mail to "svn-src-stable-10-unsubscr...@freebsd.org"