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From: zkabelac@sourceware.org To: lvm-devel@redhat.com, lvm2-cvs@sourceware.org Subject: LVM2 lib/metadata/metadata.c ./WHATS_NEW Date: Thu, 10 Mar 2011 14:40:00 -0000 [thread overview] Message-ID: <20110310144039.9093.qmail@sourceware.org> (raw) CVSROOT: /cvs/lvm2 Module name: LVM2 Changes by: zkabelac@sourceware.org 2011-03-10 14:40:33 Modified files: lib/metadata : metadata.c . : WHATS_NEW Log message: Refactor code for _lv_postoder Add _lv_postorder_vg() - for calling _lv_postorder() for every LV from VG. We use this in 2 places - vg_mark_partial_lvs() and vg_validate() so make it as a one function. Benefit here is - to use only one cleanup code and avoid potentially duplicate scans of same LVs. Patches: http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/lib/metadata/metadata.c.diff?cvsroot=lvm2&r1=1.439&r2=1.440 http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/WHATS_NEW.diff?cvsroot=lvm2&r1=1.1942&r2=1.1943 --- LVM2/lib/metadata/metadata.c 2011/03/10 13:12:00 1.439 +++ LVM2/lib/metadata/metadata.c 2011/03/10 14:40:32 1.440 @@ -2039,6 +2039,29 @@ return r; } +/* + * Calls _lv_postorder() on each LV from VG. Avoids duplicate transitivity visits. + * Clears with _lv_postorder_cleanup() when all LVs were visited by postorder. + */ +static int _lv_postorder_vg(struct volume_group *vg, + int (*fn)(struct logical_volume *lv, void *data), + void *data) +{ + struct lv_list *lvl; + int r = 1; + + dm_list_iterate_items(lvl, &vg->lvs) + if (!_lv_postorder_visit(lvl->lv, fn, data)) { + stack; + r = 0; + } + + dm_list_iterate_items(lvl, &vg->lvs) + _lv_postorder_cleanup(lvl->lv, 0); + + return r; +} + struct _lv_mark_if_partial_baton { int partial; }; @@ -2076,11 +2099,6 @@ return 1; } -static int _lv_mark_if_partial(struct logical_volume *lv) -{ - return _lv_postorder(lv, _lv_mark_if_partial_single, NULL); -} - /* * Mark LVs with missing PVs using PARTIAL_LV status flag. The flag is * propagated transitively, so LVs referencing other LVs are marked @@ -2088,14 +2106,9 @@ */ int vg_mark_partial_lvs(struct volume_group *vg) { - struct logical_volume *lv; - struct lv_list *lvl; + if (!_lv_postorder_vg(vg, _lv_mark_if_partial_single, NULL)) + return_0; - dm_list_iterate_items(lvl, &vg->lvs) { - lv = lvl->lv; - if (!_lv_mark_if_partial(lv)) - return_0; - } return 1; } @@ -2378,9 +2391,9 @@ dm_hash_destroy(lvname_hash); dm_hash_destroy(lvid_hash); - dm_list_iterate_items(lvl, &vg->lvs) { - if (!_lv_postorder(lvl->lv, _lv_validate_references_single, NULL)) - r = 0; + if (!_lv_postorder_vg(vg, _lv_validate_references_single, NULL)) { + stack; + r = 0; } dm_list_iterate_items(lvl, &vg->lvs) { --- LVM2/WHATS_NEW 2011/03/10 13:11:59 1.1942 +++ LVM2/WHATS_NEW 2011/03/10 14:40:33 1.1943 @@ -1,5 +1,6 @@ Version 2.02.85 - =================================== + Add _lv_postorder_vg() to improve efficiency for all LVs in VG. Use hash tables to speedup string search in validate_vg(). Refactor allocation of VG structure, add alloc_vg(). Avoid possible endless loop in _free_vginfo when 4 or more VGs have same name.
next reply other threads:[~2011-03-10 14:40 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2011-03-10 14:40 zkabelac [this message] -- strict thread matches above, loose matches on Subject: below -- 2011-03-14 17:01 zkabelac 2009-05-30 1:54 agk 2008-06-08 14:18 agk 2008-06-06 9:48 agk 2007-06-11 18:29 wysochanski
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