On 10/09/2013 11:59 AM, Jan Stancek wrote:
>
> ----- Original Message -----
>> From: "Maxim Uvarov" <[email protected]>
>> To: [email protected]
>> Cc: [email protected], "Maxim Uvarov" <[email protected]>
>> Sent: Friday, 4 October, 2013 12:17:11 PM
>> Subject: [LTP] [PATCH] LTP max_map_count: filer out not accounted vector
>> stub for arm
>>
>> Arm has following vector stab:
>> ffff0000-ffff1000 r-xp 00000000 00:00 0 [vectors]
>> which is not accounted in map_count.
>>
>> Signed-off-by: Maxim Uvarov <[email protected]>
>> ---
>> testcases/kernel/mem/tunable/max_map_count.c | 19 +++++++++++++++----
>> 1 file changed, 15 insertions(+), 4 deletions(-)
>>
>> diff --git a/testcases/kernel/mem/tunable/max_map_count.c
>> b/testcases/kernel/mem/tunable/max_map_count.c
>> index 01fbe5e..ca28fba 100644
>> --- a/testcases/kernel/mem/tunable/max_map_count.c
>> +++ b/testcases/kernel/mem/tunable/max_map_count.c
>> @@ -121,12 +121,24 @@ void cleanup(void)
>> * for in the vm_area_struct's map_count.
>> */
>> #if defined(__x86_64__) || defined(__x86__)
>> -static int filter_map(char *buf)
>> +static int filter_map(char *line)
>> {
>> + char buf[BUFSIZ];
>> + int ret;
>> +
>> + ret = sscanf(line, "%*p-%*p %*4s %*p %*2d:%*2d %*d %s", buf);
>> + if (ret != 1)
>> + return 0;
>> +
>> return strcmp(buf, "[vsyscall]") == 0;
>> }
>> +#elif defined(__arm__)
>> +static int filter_map(char *line)
>> +{
>> + return strncmp(line, "ffff0000-ffff1000", 17) == 0;
> Hi,
>
> just curious, why comparing the range instead of name ([vectors])?
>
> Regards,
> Jan
for arm there are 8 regions for vectors. Only that region is not accounted.
Maxim.
>> +}
>> #else
>> -static int filter_map(char *buf)
>> +static int filter_map(char *line)
>> {
>> return 0;
>> }
>> @@ -146,8 +158,7 @@ static long count_maps(pid_t pid)
>> tst_brkm(TBROK | TERRNO, cleanup, "fopen %s", buf);
>> while (getline(&line, &len, fp) != -1) {
>> /* exclude vdso and vsyscall */
>> - if (sscanf(line, "%*p-%*p %*4s %*p %*2d:%*2d %*d %s", buf) ==
>> - 1 && filter_map(buf))
>> + if (filter_map(line))
>> continue;
>> map_count++;
>> }
>> --
>> 1.7.9.5
>>
>>
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