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11 years agoFreelist cleanup/streamlining
Hallvard Furuseth [Wed, 23 Jan 2013 14:47:35 +0000 (15:47 +0100)]
Freelist cleanup/streamlining

Drop unneeded definitions, redundant code.

11 years agoITS#7512 Fix MDB page leak when malloc error.
Hallvard Furuseth [Thu, 7 Feb 2013 07:17:30 +0000 (08:17 +0100)]
ITS#7512 Fix MDB page leak when malloc error.

mdb_page_alloc(): Delay moving me_pgfirst,me_pglast
until malloc(MDB_oldpages to hold the IDs) succeeds.

11 years agoRevert "ITS#7515 fix mdb_dbi_open/close"
Howard Chu [Mon, 4 Feb 2013 18:53:17 +0000 (10:53 -0800)]
Revert "ITS#7515 fix mdb_dbi_open/close"

This reverts commit 48dc782ea612f85e8356a50bfbafe22e5be121cf.

11 years agoNULL key is allowed for MDB_CURRENT
Howard Chu [Fri, 1 Feb 2013 14:19:23 +0000 (06:19 -0800)]
NULL key is allowed for MDB_CURRENT

11 years agoITS#7515 fix mdb_dbi_open/close
Howard Chu [Fri, 1 Feb 2013 04:05:48 +0000 (20:05 -0800)]
ITS#7515 fix mdb_dbi_open/close

If a DBI handle is opened by a txn that aborts, the DBI handle
should no longer be valid.

11 years agoITS#7511 make sure cursor is marked valid after successful put
Howard Chu [Tue, 29 Jan 2013 02:45:36 +0000 (18:45 -0800)]
ITS#7511 make sure cursor is marked valid after successful put

11 years agoITS#7505 fix prev commit, partial revert
Howard Chu [Tue, 29 Jan 2013 01:08:24 +0000 (01:08 +0000)]
ITS#7505 fix prev commit, partial revert

11 years agoITS#7505 Fix mdb_update_key when key is too big
Howard Chu [Sun, 27 Jan 2013 17:55:21 +0000 (17:55 +0000)]
ITS#7505 Fix mdb_update_key when key is too big

11 years agoFix MDB_CURRENT updating for dupsort items
Howard Chu [Sat, 26 Jan 2013 18:55:35 +0000 (18:55 +0000)]
Fix MDB_CURRENT updating for dupsort items

11 years agoUpdate MDB comments: Caveats, flags, etc.
Hallvard Furuseth [Wed, 16 Jan 2013 17:42:57 +0000 (18:42 +0100)]
Update MDB comments: Caveats, flags, etc.

11 years agoITS#7485 data sizes limited to 32 bits
Howard Chu [Tue, 15 Jan 2013 12:24:07 +0000 (04:24 -0800)]
ITS#7485 data sizes limited to 32 bits

That's all we have space for in a node record.

11 years agoITS#7485 more size checks
Howard Chu [Mon, 14 Jan 2013 21:46:25 +0000 (13:46 -0800)]
ITS#7485 more size checks

11 years agoITS#7485 check maxkeysize in mdb_cursor_put
Howard Chu [Mon, 14 Jan 2013 21:12:15 +0000 (13:12 -0800)]
ITS#7485 check maxkeysize in mdb_cursor_put

Also MDB_MAXKEYSIZE is redefinable at compile time.

11 years agoOne more rename
Howard Chu [Mon, 14 Jan 2013 20:57:54 +0000 (12:57 -0800)]
One more rename

Forgot this in 98fe3390891c7577e5f2664a091088786da78ffb

11 years agoITS#7491 check for filled dirty page list
Howard Chu [Fri, 11 Jan 2013 19:45:25 +0000 (11:45 -0800)]
ITS#7491 check for filled dirty page list

Very large single transactions will fail. It's not just a problem when
nested transactions are used. We could make this dynamically sized,
but I'm not sure what the point is.

11 years agoHappy New Year
Howard Chu [Thu, 10 Jan 2013 10:58:55 +0000 (02:58 -0800)]
Happy New Year

11 years agoDelete liblmdb/mfree. It has moved into mdb_stat.
Hallvard Furuseth [Wed, 9 Jan 2013 19:49:43 +0000 (20:49 +0100)]
Delete liblmdb/mfree. It has moved into mdb_stat.

11 years agoITS#7455 don't give up so soon
Howard Chu [Wed, 9 Jan 2013 16:30:13 +0000 (08:30 -0800)]
ITS#7455 don't give up so soon

If we're operating on the freelist, see if our current pghead
can satisfy the request before giving up and using new pages.

11 years agoFix typo
Howard Chu [Wed, 19 Dec 2012 21:20:24 +0000 (13:20 -0800)]
Fix typo

11 years agoAdd initial mdb utility manpages
Howard Chu [Wed, 19 Dec 2012 21:09:56 +0000 (13:09 -0800)]
Add initial mdb utility manpages

11 years agoinit_meta should write mapsize
Howard Chu [Wed, 12 Dec 2012 06:21:52 +0000 (22:21 -0800)]
init_meta should write mapsize

Was leaving it 0 initially.

11 years agoUpdate version date
Howard Chu [Wed, 12 Dec 2012 00:01:25 +0000 (16:01 -0800)]
Update version date

11 years agoMake sure init_meta is at beginning of file
Howard Chu [Tue, 11 Dec 2012 20:55:47 +0000 (12:55 -0800)]
Make sure init_meta is at beginning of file

11 years agoMore for prev commit
Howard Chu [Tue, 11 Dec 2012 20:46:17 +0000 (12:46 -0800)]
More for prev commit

Use the latest meta page

11 years agoPartially revert 65d40eb5d2c7c28df05e2c1d9b21d90e2a82e0b5
Howard Chu [Tue, 11 Dec 2012 20:03:19 +0000 (12:03 -0800)]
Partially revert 65d40eb5d2c7c28df05e2c1d9b21d90e2a82e0b5

Allow both increasing and decreasing the environment size.
But don't allow decreasing below the currently occupied space.

11 years agoFIx prev commit
Howard Chu [Tue, 11 Dec 2012 01:21:24 +0000 (17:21 -0800)]
FIx prev commit

11 years agoAdd error checks to txn_commit
Howard Chu [Mon, 10 Dec 2012 20:21:36 +0000 (12:21 -0800)]
Add error checks to txn_commit

These ops could fail if the map is full.

11 years agoITS#7455 simplify
Howard Chu [Mon, 10 Dec 2012 20:16:50 +0000 (12:16 -0800)]
ITS#7455 simplify

Don't try to reclaim overflow pages while operating on
the freelist (for now). The circular dependencies are much like
the single-page case, but worse. Maybe look into this in the
future, but it's not absolutely necessary now.

11 years agoITS#7467 add verbose freelist info
Howard Chu [Fri, 7 Dec 2012 21:19:36 +0000 (13:19 -0800)]
ITS#7467 add verbose freelist info

11 years agoITS#7465 fail if both -a and -s specified
Howard Chu [Fri, 7 Dec 2012 20:06:30 +0000 (12:06 -0800)]
ITS#7465 fail if both -a and -s specified

11 years agoYet more retries for overflow page scan
Howard Chu [Fri, 7 Dec 2012 01:39:49 +0000 (17:39 -0800)]
Yet more retries for overflow page scan

11 years agoFreelist fixes
Howard Chu [Thu, 6 Dec 2012 16:25:43 +0000 (08:25 -0800)]
Freelist fixes

Keep list sorted if it grows during a write. Don't free pghead until
we're sure our writes are all finished.

11 years agoFix mdb_env_copy
Howard Chu [Tue, 4 Dec 2012 14:30:22 +0000 (06:30 -0800)]
Fix mdb_env_copy

Just write in 2^31 sized chunks

11 years agoRename mdb_open/close mdb_dbi_open/close
Howard Chu [Tue, 4 Dec 2012 00:53:24 +0000 (16:53 -0800)]
Rename mdb_open/close mdb_dbi_open/close

Avoid possible symbol clashes with MDB-Tools libmdb

11 years agoFix 5c1ee7f7ba9580d5ff29e74cbb02eee335c33d94
Howard Chu [Mon, 3 Dec 2012 21:57:46 +0000 (13:57 -0800)]
Fix 5c1ee7f7ba9580d5ff29e74cbb02eee335c33d94

mdb_cursor_sibling() no longer pops cursor before returning.

11 years agoFix mdb_midl_shrink
Howard Chu [Mon, 3 Dec 2012 21:57:28 +0000 (13:57 -0800)]
Fix mdb_midl_shrink

11 years agoMore retries for overflow page scan
Howard Chu [Fri, 30 Nov 2012 20:54:19 +0000 (12:54 -0800)]
More retries for overflow page scan

11 years agoRename libmdb to liblmdb
Howard Chu [Fri, 30 Nov 2012 20:45:34 +0000 (12:45 -0800)]
Rename libmdb to liblmdb

11 years agoAdd install target
Howard Chu [Fri, 30 Nov 2012 20:39:53 +0000 (12:39 -0800)]
Add install target

11 years agoRename libmdb to liblmdb, lmdb.h
Howard Chu [Fri, 30 Nov 2012 20:30:51 +0000 (12:30 -0800)]
Rename libmdb to liblmdb, lmdb.h

Avoid naming conflicts with other mdb* packages. Bump version to 0.9.5

11 years agoITS#7455 use freelist for overflow pages
Howard Chu [Thu, 29 Nov 2012 01:13:26 +0000 (17:13 -0800)]
ITS#7455 use freelist for overflow pages

11 years agoDrop unneeded #include <time.h>
Howard Chu [Wed, 28 Nov 2012 23:34:44 +0000 (15:34 -0800)]
Drop unneeded #include <time.h>

11 years agoDoc layout tweaks
Howard Chu [Wed, 28 Nov 2012 23:34:19 +0000 (15:34 -0800)]
Doc layout tweaks

11 years agomdb_env_sync(,force=1): Override MDB_MAPASYNC.
Hallvard Furuseth [Tue, 27 Nov 2012 22:56:47 +0000 (23:56 +0100)]
mdb_env_sync(,force=1): Override MDB_MAPASYNC.

With MDB_MAPASYNC, the API provided no way to ensure full sync.

11 years agomdb_cursor_dbi(): Assume valid args.
Hallvard Furuseth [Tue, 27 Nov 2012 22:56:47 +0000 (23:56 +0100)]
mdb_cursor_dbi(): Assume valid args.

It returned 0, which is the freelist DBI and is valid for a few uses.

11 years agoAPI change: mdb_drop() only accepts del=0 or 1.
Hallvard Furuseth [Tue, 27 Nov 2012 22:56:47 +0000 (23:56 +0100)]
API change: mdb_drop() only accepts del=0 or 1.

This allows for other flag values in the future.

11 years agoAPI change: mdb_env_set_maxdbs(, *named* DBs).
Hallvard Furuseth [Tue, 27 Nov 2012 22:56:47 +0000 (23:56 +0100)]
API change: mdb_env_set_maxdbs(, *named* DBs).

Let the user specify the number of databases he will actually
use. Adding 2 for FREE_DBI and MAIN_DBI is an internal matter.

11 years agoITS#7453 Fix reset of MDB_NOSYNC/MDB_NOMETASYNC.
Hallvard Furuseth [Tue, 27 Nov 2012 22:56:47 +0000 (23:56 +0100)]
ITS#7453 Fix reset of MDB_NOSYNC/MDB_NOMETASYNC.

mdb_env_open() with these flags did not open a synchronizing
file descriptor.  Thus disabling them later did not work.

11 years agoTweak MDB_FIXEDMAP handling.
Hallvard Furuseth [Tue, 27 Nov 2012 22:56:47 +0000 (23:56 +0100)]
Tweak MDB_FIXEDMAP handling.

Drop mmap()'s MAP_FIXED flag, so it returns another address instead
of unmapping existing overlapping pages. Verify the returned address.

11 years agoRenumber MDB_NOSUBDIR. Check mdb_env_open() flags.
Hallvard Furuseth [Tue, 27 Nov 2012 22:56:47 +0000 (23:56 +0100)]
Renumber MDB_NOSUBDIR. Check mdb_env_open() flags.

MDB_NOSUBDIR was == MDB_REVERSEKEY. That affected the freelist:
Env flags are stored in mm_flags alias mm_dbs[FREE_DBI].md_flags.

It stays a persistent flag, in case mdb_env_open someday wants
to pick/verify which lockfile to use with the datafile.

Catch bad flags so they will no longer make it into the data file.

11 years agoITS#7432 fix typo in mdb_midl_sort
Howard Chu [Mon, 5 Nov 2012 13:06:06 +0000 (05:06 -0800)]
ITS#7432 fix typo in mdb_midl_sort

Wasn't pushing the optimal half of the array onto the stack,
thus used more stack than expected -> overrun.

11 years agoBetter fix for MDB_DEBUG tweak -- from hbf
Howard Chu [Thu, 25 Oct 2012 13:55:46 +0000 (06:55 -0700)]
Better fix for MDB_DEBUG tweak -- from hbf

11 years agoRevert "MDB_DEBUG tweak for old compilers"
Howard Chu [Thu, 25 Oct 2012 13:54:09 +0000 (06:54 -0700)]
Revert "MDB_DEBUG tweak for old compilers"

This reverts commit ef2092eac9f35b77eae250801c96dfa515c6d4b2.

11 years agoMDB_DEBUG tweak for old compilers
Howard Chu [Thu, 25 Oct 2012 12:28:55 +0000 (05:28 -0700)]
MDB_DEBUG tweak for old compilers

11 years agoFix flag checks in mdb_open
Howard Chu [Tue, 23 Oct 2012 11:48:04 +0000 (04:48 -0700)]
Fix flag checks in mdb_open

11 years agofix Windows mdb_env_copy(), WriteFile overflow
Howard Chu [Tue, 23 Oct 2012 11:32:55 +0000 (04:32 -0700)]
fix Windows mdb_env_copy(), WriteFile overflow

11 years agoMake sure mdb_open flags are committed on main DB
Howard Chu [Tue, 23 Oct 2012 00:03:15 +0000 (17:03 -0700)]
Make sure mdb_open flags are committed on main DB

If no data was modified in the txn, mdb_open flag changes were dropped.

11 years agoMinor cleanup
Howard Chu [Mon, 22 Oct 2012 23:13:06 +0000 (16:13 -0700)]
Minor cleanup

11 years agoFix MDB_PREV
Howard Chu [Mon, 22 Oct 2012 22:58:46 +0000 (15:58 -0700)]
Fix MDB_PREV

Could return 1 garbage record before actual data, if starting from EOF

11 years agoTweak output, add free page info
Howard Chu [Tue, 16 Oct 2012 23:52:13 +0000 (16:52 -0700)]
Tweak output, add free page info

11 years agoAdd mdb_env_info() to retrieve interesting env params
Howard Chu [Tue, 16 Oct 2012 23:22:21 +0000 (16:22 -0700)]
Add mdb_env_info() to retrieve interesting env params

11 years agoMerge mdb_stata into mdb_stat
Howard Chu [Tue, 16 Oct 2012 22:28:20 +0000 (15:28 -0700)]
Merge mdb_stata into mdb_stat

11 years agoMake sure increases of mapsize are persisted
Howard Chu [Tue, 16 Oct 2012 21:53:25 +0000 (14:53 -0700)]
Make sure increases of mapsize are persisted

11 years agoITS#7377 Errorcheck Windows calls and thread keys.
Hallvard Furuseth [Mon, 15 Oct 2012 15:04:48 +0000 (17:04 +0200)]
ITS#7377 Errorcheck Windows calls and thread keys.

11 years agoExplicitly unlock the MDB lockfile on Windows.
Hallvard Furuseth [Mon, 15 Oct 2012 15:04:43 +0000 (17:04 +0200)]
Explicitly unlock the MDB lockfile on Windows.

11 years agomdb_env_open(): Keep mdb_env_set_flags() flags.
Hallvard Furuseth [Mon, 15 Oct 2012 15:04:11 +0000 (17:04 +0200)]
mdb_env_open(): Keep mdb_env_set_flags() flags.

11 years agoMore for mdb_env_copy().
Hallvard Furuseth [Mon, 15 Oct 2012 15:03:46 +0000 (17:03 +0200)]
More for mdb_env_copy().

Fix #define _GNU_SOURCE = 1 to match any command line -D_GNU_SOURCE.
.gitignore += mdb_copy.

11 years agoFix last commit.
Hallvard Furuseth [Mon, 15 Oct 2012 15:03:33 +0000 (17:03 +0200)]
Fix last commit.

Add flag MDB_ENV_ACTIVE instead of using the state of me_lfd.
Require MDB_RDONLY for MDB_ROFS.  Swap reader/writer mutex lock.

11 years agoSupport read access on read-only media
Howard Chu [Sat, 13 Oct 2012 11:05:00 +0000 (04:05 -0700)]
Support read access on read-only media

11 years agoSilence warning in prev commit
Howard Chu [Thu, 11 Oct 2012 23:47:56 +0000 (16:47 -0700)]
Silence warning in prev commit

11 years agoAdd mdb_copy for backing up a DB environment
Howard Chu [Thu, 11 Oct 2012 19:21:40 +0000 (12:21 -0700)]
Add mdb_copy for backing up a DB environment

11 years agoTweak MDB restrictions
Hallvard Furuseth [Wed, 3 Oct 2012 19:13:21 +0000 (21:13 +0200)]
Tweak MDB restrictions

11 years agoFix mdb_open() off-by-one error in maxdbs check
Hallvard Furuseth [Wed, 3 Oct 2012 16:08:56 +0000 (18:08 +0200)]
Fix mdb_open() off-by-one error in maxdbs check

11 years agoITS#7377 Wrap fcntl F_SETLK in EINTR loop too.
Hallvard Furuseth [Wed, 3 Oct 2012 16:06:29 +0000 (18:06 +0200)]
ITS#7377 Wrap fcntl F_SETLK in EINTR loop too.

This can happen even on local filesystems.

11 years agoITS#7377 Catch ftruncate() error
Hallvard Furuseth [Wed, 3 Oct 2012 16:06:29 +0000 (18:06 +0200)]
ITS#7377 Catch ftruncate() error

11 years agoITS#7377 Document caveats/troubeshooting.
Hallvard Furuseth [Wed, 3 Oct 2012 16:04:07 +0000 (18:04 +0200)]
ITS#7377 Document caveats/troubeshooting.

11 years agoFix prev commit
Howard Chu [Sun, 30 Sep 2012 17:01:57 +0000 (10:01 -0700)]
Fix prev commit

It only worked if the freelist was already non-empty

11 years agoFix mdb_drop
Howard Chu [Sun, 30 Sep 2012 14:49:30 +0000 (07:49 -0700)]
Fix mdb_drop

if it was the only operation in a txn, it would be ignored.

11 years agoITS#7385, check further for bad splits
Howard Chu [Thu, 27 Sep 2012 12:01:53 +0000 (05:01 -0700)]
ITS#7385, check further for bad splits

More for 48ef27b6f5c804eca6a9d27f8dd2b4ded376f8af
Our definition of "large" data item needs to be smaller to
handle more cases where a bad split is possible

11 years agoAdd MDB_GET_CURRENT
Howard Chu [Wed, 19 Sep 2012 13:15:09 +0000 (06:15 -0700)]
Add MDB_GET_CURRENT

return whatever the cursor is currently pointing at

11 years agoITS#7394 ignore WRITEMAP if RDONLY
Howard Chu [Tue, 18 Sep 2012 19:36:54 +0000 (12:36 -0700)]
ITS#7394 ignore WRITEMAP if RDONLY

11 years agoMore for 48ef27b6f5c804eca6a9d27f8dd2b4ded376f8af
Howard Chu [Mon, 17 Sep 2012 14:02:41 +0000 (07:02 -0700)]
More for 48ef27b6f5c804eca6a9d27f8dd2b4ded376f8af

page_split with newindex > split_indx

11 years agoMore for ab04c50a32275e216b82edaeeed50208cf49336b
Howard Chu [Mon, 17 Sep 2012 14:01:28 +0000 (07:01 -0700)]
More for ab04c50a32275e216b82edaeeed50208cf49336b

Use explicit MDB_RDONLY flag

11 years agoITS#7377 Catch MDB user errors.
Hallvard Furuseth [Mon, 17 Sep 2012 13:42:15 +0000 (15:42 +0200)]
ITS#7377 Catch MDB user errors.

11 years agoITS#7377 Catch MDB setup errors and clean up.
Hallvard Furuseth [Mon, 17 Sep 2012 13:42:15 +0000 (15:42 +0200)]
ITS#7377 Catch MDB setup errors and clean up.

11 years agoITS#7364 Limit mdb lock upgrade before sem_unlink.
Hallvard Furuseth [Mon, 17 Sep 2012 13:42:15 +0000 (15:42 +0200)]
ITS#7364 Limit mdb lock upgrade before sem_unlink.

Do not try shared lock when closing or after error.  Track file lock
state to decide.  Change meaning of *excl to reflect file lock state.

11 years agoITS#7364 Always sem_unlink() in mdb_env_open().
Hallvard Furuseth [Mon, 17 Sep 2012 13:42:15 +0000 (15:42 +0200)]
ITS#7364 Always sem_unlink() in mdb_env_open().

Drop the sem_unlink() error checks, which could prevent the 2nd
unlink.  Instead use O_EXCL in sem_open().

This makes "open+close the database" the API for trying to clean
away the old semaphores, if they were left behind by a previous run.

11 years agoITS#7377 Wrap sem_wait & file locks in EINTR loops
Hallvard Furuseth [Mon, 17 Sep 2012 13:42:14 +0000 (15:42 +0200)]
ITS#7377 Wrap sem_wait & file locks in EINTR loops

11 years agoRemove mdb data races. Use (txnid_t)-1 as "no ID".
Hallvard Furuseth [Mon, 17 Sep 2012 13:42:14 +0000 (15:42 +0200)]
Remove mdb data races. Use (txnid_t)-1 as "no ID".

Avoid race between numreaders++ and reading numreaders at cleanup. Make
the un-mutexed reset of reader table entry, atomic: Reset mr_pid only.

Instead check mr_pid != 0 in mdb_page_alloc()'s scan for readers.
(txnid_t)-1 as "no ID"-mark avoids a check for mr_txnid != 0.
The scan can stop when seeing an old reader.

11 years agoSave pid in MDB_env instead of repeating getpid().
Hallvard Furuseth [Mon, 17 Sep 2012 13:42:14 +0000 (15:42 +0200)]
Save pid in MDB_env instead of repeating getpid().

An open MDB environment does not survive or catch fork(),
so repeating getpid() was pointless.

11 years agoMDB_WRITEMAP needs no DSYNC descriptor (me_mfd)
Hallvard Furuseth [Mon, 17 Sep 2012 13:42:14 +0000 (15:42 +0200)]
MDB_WRITEMAP needs no DSYNC descriptor (me_mfd)

11 years agoITS#7363 Preprocessor namespace cleanup.
Hallvard Furuseth [Mon, 17 Sep 2012 13:42:14 +0000 (15:42 +0200)]
ITS#7363 Preprocessor namespace cleanup.

Rename USE_POSIX_SEM to MDB_USE_POSIX_SEM.
Separate MDB_FDATASYNC from MDB_USE_POSIX_SEM.

11 years agoMore for ab04c50a32275e216b82edaeeed50208cf49336b
Howard Chu [Mon, 17 Sep 2012 13:35:03 +0000 (06:35 -0700)]
More for ab04c50a32275e216b82edaeeed50208cf49336b

Fix typos, error code ranges

11 years agoAdd mdb_cursor_renew()
Howard Chu [Mon, 17 Sep 2012 11:41:13 +0000 (04:41 -0700)]
Add mdb_cursor_renew()

Allow cursors on read-only txns to be reused with later txns.

11 years agoShared lib should depend on pthread
Howard Chu [Mon, 17 Sep 2012 10:48:54 +0000 (03:48 -0700)]
Shared lib should depend on pthread

11 years agoAdd MDB_SET_KEY cursor op
Howard Chu [Mon, 17 Sep 2012 09:17:25 +0000 (02:17 -0700)]
Add MDB_SET_KEY cursor op

Overwrites the passed in key with the DB's key

11 years agoITS#7383 More explicit error codes
Howard Chu [Fri, 14 Sep 2012 13:05:48 +0000 (06:05 -0700)]
ITS#7383 More explicit error codes

11 years agoITS#7385 fix mdb_page_split (again)
Howard Chu [Wed, 12 Sep 2012 17:43:27 +0000 (10:43 -0700)]
ITS#7385 fix mdb_page_split (again)

More for d793594173bb5367e466134d5fe3366feeb672f6 ITS#7229

11 years agoUpdate comments, bump version
Howard Chu [Fri, 7 Sep 2012 20:40:07 +0000 (13:40 -0700)]
Update comments, bump version

Note read-write vs read-only mmap tradeoffs.

11 years agomsync should default to fully synchronous
Howard Chu [Thu, 6 Sep 2012 18:17:25 +0000 (11:17 -0700)]
msync should default to fully synchronous