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Move the increment of vg->pv_count next to the place where we add to
vg->pvs. It looks safe to do this since the only caller of import_pool_vg()
calls import_pool_pvs() immediately afterward, and there is no way
import_pool_vg() can fail (always returns 1). However, if there's a
memory allocation failure inside import_pool_pvs(), we will end up with
a different count in vg->pv_count that with the original code. In any
case, vg->pv_count should be as close to dm_list_size(&vg->pvs) as
possible, as is the case everywhere else in the code.
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
The dm_list * parameter is unnecessary since we are passing in 'vg'
and the only caller of import_pool_pvs() passes '&vg->pvs' in the
dm_list * parameter. Just use vg->pvs directly in the function.
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Patch is inspired by Debian's extra patch.
- removes OWNER & GROUP make vars they are parts of INSTALL command.
- adds INSTALL_PROGRAM for executable, uses $(INSTALL)
- adds INSTALL_DATA for non-executable data, uses ($INSTALL)
- adds INSTALL_WDATA for writable non-executable data, uses ($INSTALL)
- adds configure option --enable-write_install - to support
installatin of writable files used by distribution
- replaces usage of ifeq @LIB_SUFFIX@ with $(LIB_SUFFIX)
- installs .a files from static builds without executable flag
- installs .a files to $(usrlibdir) instead of $(libdir)
- installs all static binaries to $(staticdir)
- create .so links for devel package in $(usrlibdir) instead of
$(libdir)
- makes .so and .so.LIB_VERSION files within builddir
- removes VERSIONED_SHLIB and created versioned LIB_SHARED automagicaly
- install LIB_SHARED via install_lib_shared target
- install plugins via install_lib_shared_plugin target
- prints whole 'install' command during installation instead of less
informative "Installing $(something) $(somewhere)"
- install multiple man pages with one INSTALL command
- use DISTCLEAN_TARGETS instead of creating multiple distclean targets
Usage of VPATH makes troubles when used within $(builddir).
Not only source files are being found through VPATH,
but targets as well. (make --debug=v)
Thus if user builds the code in $(srcdir) and also in some $(builddir)
he gets mangled results as some generated files (i.e. .export.sym)
are 'reused' from $(srcdir) instead of $(builddir).
This patch switches to use vpath were we could explicitly name
suffixes that should be looked via vpath - we must take care,
we do not generate files with these suffixes:
.c, .in, .po, .exported_symbols
A user specifying duplicate paths on the cmdline of vgcreate will
get a message similar to the following:
vgcreate vgtest2 /dev/loop3 /dev/loop5
Found duplicate PV jk1lXsKzwyOKlXq6bhaFFKMQQ06oPgu8: using /dev/loop5 not /dev/loop3
Found duplicate PV jk1lXsKzwyOKlXq6bhaFFKMQQ06oPgu8: using /dev/loop3 not /dev/loop5
Internal error: Duplicate PV id jk1lXs-Kzwy-OKlX-q6bh-aFFK-MQQ0-6oPgu8 detected for /dev/loop3 in vgtest2.
This is caught by vg_validate(), but it would be good to find
this condition earlier in the vgcreate code. add_pv_to_vg()
currently checks by pvname, but does not look for duplcate pvids.
This patch adds the check for duplicate pvids and results in new
error output as follows:
vgcreate vgtest2 /dev/loop3 /dev/loop5
Found duplicate PV jk1lXsKzwyOKlXq6bhaFFKMQQ06oPgu8: using /dev/loop5 not /dev/loop3
Found duplicate PV jk1lXsKzwyOKlXq6bhaFFKMQQ06oPgu8: using /dev/loop3 not /dev/loop5
Physical volume '/dev/loop5 (jk1lXs-Kzwy-OKlX-q6bh-aFFK-MQQ0-6oPgu8)' listed more than once.
Unable to add physical volume '/dev/loop5' to volume group 'vgtest2'.
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
When moving parts of striped LVs, pvmove wouldn't care about leaving you with
two stripes on the same disk. Now --alloc anywhere is needed for that.
(Tried and gave up on two alternative approaches before the one committed here.)
Small refactor of main places in the code where a pv is added to a
vg into a small function which adds the pv to the list and updates
the vg counts.
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Refactor adding to the vg->pvs list and incrementing the count, which
will allow further refactoring. Should be no functional change.
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Simple refactor to mov code that updates the vg extent counts from a
single pv's counts close to the code that adds a pv to vg->pvs and
updates vg->pv_count. No functional change.
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
In add_pv_to_vg(), we should only add the pv to vg->pvs after all
internal checks have passed. The check for vg->extent_count exeeding
maximum was after we added the pv to the list, so this function could
return a state of vg->pvs that did not reflect other parameters such
as vg->pv_count.
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Because we have now strong rule for lock ordering:
- VG locks must be taken in alphabetical order
- ORPHAN locks must be the last
vgs_locked() is now not needed.
This fixes problem with orphan locking, e.g.
vgremove VG1 | vgremove VG2
lock(VG1) | lock(VG2)
lock(ORPHAN) | lock(ORPHAN) -> fail, non-blocking
https://bugzilla.redhat.com/show_bug.cgi?id=578413
(More similar places in code.)
Physical segments were still allocated from global
command context mempool.
This leads to very high memory usage when
activating large VG (vgchange).
(Memory usage was about 2G when >3000LVs).
Fix it by properly using vg->vgmem private pool,
so all the memory is released early.
New memory pool parameter is needed here for pv_split_segment
function.
Also fix the same problem in some minor allocations
(vg description, lv segment split).
In addition to previous patch, we really do not need
to search for segment which was just allocated in
split request.
Make pv_split_segment function return newly allocated
(split) segment also.
(So after this patch, there is only one user
of slow find_peg_by_pe).
The function find_peg_by_pe is incredibly inefficient
for Pvs with many segments.
In shiny future there should be binary (or interval) tree
instead of sorted linked list (volunteers?).
Anyway, for now, we can use dirty trick here to optimise this case:
- Allocations are usually applied from the beginning
of PV (we have no alloocation policy which allocates areas
"backwards")
- The only user of find_peg_by_pe is pv_split_segment()
call. In *most* cases it need to split *last* PV segment.
So if we search sorted pv segment list backwards, we
hit the requested segment immediatelly.
This patch applies this tiny change.
(and saves >30% of processing time when >3000LVs segments are on one PV!)
To discourage using this inefficient function from other code,
it is moved to pv_manip.c and used static for now:-)
vg_validate call is an adept to optimisation, it is very
ineeficient and slow.
Anyway, we should call it only before writing data to disk.
The call in lvmcache was just temporary validation,
we realy do not need to revalidate cached metadata
every time.
(Actually, I added that there just to prove that cache works
properly and forgot to remove it.)
Patch removes it from lvmcache completely, this can hit only
internal bug in export function (and this bug must
be detected in any vg_write call anyway before).
The _read_vg uses already hash for PVs to optimise
reading of large VGs and avoiding repeated PV list traversing.
Use the same aproach to speed up parsing VG with many LVs.
Code moves initilization of stats values to _memlock_maps().
For dmeventd we need to use mlockall() - so avoid reading config value
and go with _use_mlockall code path.
Patch assumes dmeventd uses C locales!
Patch needs the call or memlock_inc_daemon() before memlock_inc()
(which is our common use case).
Some minor code cleanup patch for _un/_lock_mem_if_needed().
in clvmd, dmevend, man, tests.
Don't include dependency files for clow and cscope.out targets
Improve dependency tracking for dmeventd and liblvm2cmd sources.
to obtain sources. Create make.tmpl target for
simplier generation of cflow files with the help of
CFLOW_LIST, CFLOW_LIST_TARGET, CFLOW_TARGET.
Still cflow usage is not perfect.
Move daemons/ and lib/ subtargets to their Makefiles so we don't get
double cleanup error during execution of distclean target.
Instead of duplicating clean target inside distclean target,
just use it as a subtarget and avoid add duplicating code.
This check-in enables the 'mirrored' log type. It can be specified
by using the '--mirrorlog' option as follows:
#> lvcreate -m1 --mirrorlog mirrored -L 5G -n lv vg
I've also included a couple updates to the testsuite. These updates
include tests for the new log type, and some fixes to some of the
*lvconvert* tests.
clvmd's do_lock_lv() already properly controls dmeventd monitoring based
on LCK_DMEVENTD_MONITOR_MODE in lock_flags -- though one small fix was
needed for this to work: _lock_for_cluster() must treat
dmeventd_monitor_mode()'s return as a tri-state value.
Also cleanup do_lock_lv() to:
- explicitly init_dmeventd_monitor() based on LCK_DMEVENTD_MONITOR_MODE
- no longer reset init_dmeventd_monitor() to default at the end of
do_lock_lv() -- it is unnecessary
This is the next preparatory step towards better --alloc anywhere
support and is not intended to break anything that currently works so
please report any problems - segfaults, bogus data in the new debug
messages, or if the code now chooses bizarre allocation layouts.
