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Changed default thread stack to 288K to get better memory missalignment between stacks of different threads (should speed up things) and to get a bit extra safety.

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In maria_open(), don't allocate big arrays on stack as this may lead to stack overflow.
This fixes a valgrind warning detected by buildbot

include/my_pthread.h:
  Changed default thread stack to 288K to get better memory missalignment between stacks of different threads (should speed up things) and to get a bit extra safety.
storage/maria/ma_open.c:
  In maria_open(), don't allocate big arrays on stack as this may lead to stack overflow.
This commit is contained in:
Michael Widenius
2009-06-30 15:01:29 +03:00
parent bb55791994
commit f1183fc160
2 changed files with 24 additions and 11 deletions
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2
include/my_pthread.h
View File

@@ -691,7 +691,7 @@ extern void my_mutex_end();
We need to have at least 256K stack to handle calls to myisamchk_init()
with the current number of keys and key parts.
*/
#define DEFAULT_THREAD_STACK (256*1024L)
#define DEFAULT_THREAD_STACK (288*1024L)
#endif
#define MY_PTHREAD_LOCK_READ 0

33
storage/maria/ma_open.c
View File

@@ -256,15 +256,16 @@ MARIA_HA *maria_clone(MARIA_SHARE *share, int mode)
MARIA_HA *maria_open(const char *name, int mode, uint open_flags)
{
int kfile,open_mode,save_errno;
uint i,j,len,errpos,head_length,base_pos,info_length,keys, realpath_err,
uint i,j,len,errpos,head_length,base_pos,keys, realpath_err,
key_parts,unique_key_parts,fulltext_keys,uniques;
size_t info_length;
char name_buff[FN_REFLEN], org_name[FN_REFLEN], index_name[FN_REFLEN],
data_name[FN_REFLEN];
uchar *disk_cache, *disk_pos, *end_pos;
MARIA_HA info,*m_info,*old_info;
MARIA_SHARE share_buff,*share;
double rec_per_key_part[HA_MAX_POSSIBLE_KEY*HA_MAX_KEY_SEG];
ulong nulls_per_key_part[HA_MAX_POSSIBLE_KEY*HA_MAX_KEY_SEG];
double *rec_per_key_part;
ulong *nulls_per_key_part;
my_off_t key_root[HA_MAX_POSSIBLE_KEY];
ulonglong max_key_file_length, max_data_file_length;
my_bool versioning= 1;
@@ -294,8 +295,6 @@ MARIA_HA *maria_open(const char *name, int mode, uint open_flags)
{
share= &share_buff;
bzero((uchar*) &share_buff,sizeof(share_buff));
share_buff.state.rec_per_key_part= rec_per_key_part;
share_buff.state.nulls_per_key_part= nulls_per_key_part;
share_buff.state.key_root=key_root;
share_buff.pagecache= multi_pagecache_search((uchar*) name_buff,
(uint) strlen(name_buff),
@@ -360,11 +359,27 @@ MARIA_HA *maria_open(const char *name, int mode, uint open_flags)
info_length=mi_uint2korr(share->state.header.header_length);
base_pos= mi_uint2korr(share->state.header.base_pos);
if (!(disk_cache= (uchar*) my_alloca(info_length+128)))
/*
Allocate space for header information and for data that is too
big to keep on stack
*/
if (!my_multi_malloc(MY_WME,
&disk_cache, info_length+128,
&rec_per_key_part,
(sizeof(*rec_per_key_part) * HA_MAX_POSSIBLE_KEY *
HA_MAX_KEY_SEG),
&nulls_per_key_part,
(sizeof(*nulls_per_key_part) * HA_MAX_POSSIBLE_KEY *
HA_MAX_KEY_SEG),
NullS))
{
my_errno=ENOMEM;
goto err;
}
share_buff.state.rec_per_key_part= rec_per_key_part;
share_buff.state.nulls_per_key_part= nulls_per_key_part;
end_pos=disk_cache+info_length;
errpos= 3;
if (my_pread(kfile, disk_cache, info_length, 0L, MYF(MY_NABP)))
@@ -783,7 +798,7 @@ MARIA_HA *maria_open(const char *name, int mode, uint open_flags)
(keys ? MARIA_INDEX_BLOCK_MARGIN *
share->block_size * keys : 0));
share->block_size= share->base.block_size;
my_afree(disk_cache);
my_free(disk_cache, MYF(0));
_ma_setup_functions(share);
if ((*share->once_init)(share, info.dfile.file))
goto err;
@@ -926,9 +941,7 @@ err:
my_free(share,MYF(0));
/* fall through */
case 3:
/* fall through */
case 2:
my_afree(disk_cache);
my_free(disk_cache, MYF(0));
/* fall through */
case 1:
VOID(my_close(kfile,MYF(0)));