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mdbx: refine meta-commit in WRITEMAP mode.

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Change-Id: Ieb53bf6144a104fc88b0b07b4abdde20f4b01978
This commit is contained in:
Leo Yuriev 2017-05-28 18:31:33 +03:00
parent 2347282b4f
commit fca74ab80c
1 changed files with 3 additions and 6 deletions
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9
src/mdbx.c
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@ -3661,13 +3661,10 @@ static int mdbx_sync_locked(MDBX_env *env, unsigned flags,
if (env->me_flags & MDBX_WRITEMAP) { if (env->me_flags & MDBX_WRITEMAP) {
mdbx_jitter4testing(true); mdbx_jitter4testing(true);
if (likely(target != head)) { if (likely(target != head)) {
mdbx_meta_update_begin(env, target, pending->mm_txnid_top); /* LY: 'invalidate' the meta. */
#ifdef NDEBUG
/* nodebug: 'invalidate' the meta to avoid false-reading
* from violators (make safer) */
target->mm_datasync_sign = MDBX_DATASIGN_WEAK; target->mm_datasync_sign = MDBX_DATASIGN_WEAK;
mdbx_coherent_barrier(); mdbx_meta_update_begin(env, target, pending->mm_txnid_top);
#else #ifndef NDEBUG
/* debug: provoke failure to catch a violators */ /* debug: provoke failure to catch a violators */
memset(target->mm_dbs, 0xCC, memset(target->mm_dbs, 0xCC,
sizeof(target->mm_dbs) + sizeof(target->mm_canary)); sizeof(target->mm_dbs) + sizeof(target->mm_canary));