Too small stack on Oneiric workers?

[Laurynas Biveinis]

Some PS 5.1 Jenkins tests fail on Oneiric 64 bit workers in the following way:

For example, not_embedded_server:

Program terminated with signal 11, Segmentation fault.
#0 0x00000000005e75d8 in check_stack_overrun(THD*, long, unsigned char*) ()
#0 0x00000000005e75d8 in check_stack_overrun(THD*, long, unsigned char*) ()
#1 0x00000000005daeb1 in check_enough_stack_size() ()
#2 0x00000000008eca2b in p_ere ()
...
#2198 0x00000000008ecdc1 in p_ere ()
#2199 0x00000000008ee38d in my_regcomp ()
#2200 0x00000000005700df in Item_func_regex::regcomp(bool) ()
#2201 0x000000000057057f in Item_func_regex::fix_fields(THD*, Item**) ()
#2202 0x000000000061f098 in setup_fields(THD*, Item**, List<Item>&, enum_mark_columns, List<Item>*, bool) ()
#2203 0x0000000000647d53 in JOIN::prepare ()
#2204 0x0000000000652f64 in mysql_select(THD*, Item***, TABLE_LIST*, unsigned int, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*) ()
#2205 0x000000000065341c in handle_select(THD*, st_lex*, select_result*, unsigned long) ()
#2206 0x00000000005e50df in execute_sqlcom_select(THD*, TABLE_LIST*) ()
#2207 0x00000000005ec6ad in mysql_execute_command(THD*) ()
#2208 0x00000000005f24c7 in mysql_parse(THD*, char*, unsigned int, char const**) ()
#2209 0x00000000005f2e91 in dispatch_command(enum_server_command, THD*, char*, unsigned int) ()
#2210 0x00000000005f3d9a in do_command(THD*) ()
#2211 0x00000000005e48c5 in handle_one_connection ()
#2212 0x00007f9e2d88eefc in start_thread (arg=0x7f9e2dd72700) at pthread_create.c:304
#2213 0x00007f9e2c7e189d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#2214 0x0000000000000000 in ?? ()

jenkins.percona.com/view/Percona Server 5.1/job/percona-server-5.1-trunk/580/BUILD_TYPE=release,Host=ubuntu-oneiric-64bit/consoleFull

Also subselect_notembedded, sp_notembedded, execution_constants fail with a different but still deep backtrace (omitting it for brevity)

[Laurynas Biveinis (laurynas-biveinis)]

(a clickable link)

http://jenkins.percona.com/view/Percona%20Server%205.1/job/percona-server-5.1-trunk/580/BUILD_TYPE=release,Host=ubuntu-oneiric-64bit/consoleFull