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mdbx: major fix - madvise(MADV_REMOVE) only for exclusive mode.

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Change-Id: I6799df7b85eaf32a1c46f251ca64a4df4ff092b2
This commit is contained in:
Leo Yuriev 2017-07-26 11:34:07 +03:00
parent a3ee20e4f6
commit 0b07749fba
1 changed files with 6 additions and 3 deletions
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9
src/mdbx.c
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@ -4205,9 +4205,10 @@ static int __cold mdbx_env_map(MDBX_env *env, size_t usedsize) {
#endif
#ifdef MADV_REMOVE
if (env->me_flags & MDBX_WRITEMAP)
if (usedsize && (env->me_flags & MDBX_WRITEMAP)) {
(void)madvise(env->me_map + usedsize, env->me_mapsize - usedsize,
MADV_REMOVE);
}
#else
(void)usedsize;
#endif
@ -4619,8 +4620,10 @@ static int __cold mdbx_setup_dxb(MDBX_env *env, int lck_rc) {
}
}
err = mdbx_env_map(env, expected_bytes);
if (err)
err = mdbx_env_map(env, (lck_rc != /* lck exclusive */ MDBX_RESULT_TRUE)
? 0
: expected_bytes);
if (err != MDBX_SUCCESS)
return err;
const unsigned meta_clash_mask = mdbx_meta_eq_mask(env);