Re: [LTP] [PATCH] mem/hugeshmat: new case for hugepage leak inspection

[Li Wang <liwang@redhat.com>]

The regression has a long history, Patch in upstream 2.6.20-rc1
GIT: 39dde65c9940c97fcd178a3d2b1c57ed8b7b68aa. 
https://lkml.org/lkml/2012/4/16/129

Not long before, Fujistu guys request us(RedHat) to cover this regression test in RHEL7-next , then I found two Redhat BZs on clearly tracing this issue:
https://bugzilla.redhat.com/show_bug.cgi?id=428612
https://bugzilla.redhat.com/show_bug.cgi?id=222753#c16
So, I port the testcase to LTP.

-- 
Regards, 
Li Wang 
Email: liwang@redhat.com 



----- Original Message -----
> 
> 
> 
> 
> ----- Original Message -----
> > From: "Li Wang" <liwang@redhat.com>
> > To: ltp-list@lists.sourceforge.net
> > Sent: Saturday, 27 December, 2014 8:13:06 AM
> > Subject: [LTP] [PATCH] mem/hugeshmat: new case for hugepage leak inspection
> > 
> > Description of Problem:
> >     When over 1GB shared memory was alocated in hugepage, the hugepage
> >     is not released though process finished.
> 
> This looks like a regression test for kernel bug. Do you know what
> kernel version are affected and which commit is fixing it?
> 
> Regards,
> Jan
> 
> > 
> > Signed-off-by: Li Wang <liwang@redhat.com>
> > ---
> >  runtest/hugetlb                                    |   1 +
> >  testcases/kernel/mem/.gitignore                    |   1 +
> >  .../kernel/mem/hugetlb/hugeshmat/hugeshmat04.c     | 185
> >  +++++++++++++++++++++
> >  3 files changed, 187 insertions(+)
> >  create mode 100644 testcases/kernel/mem/hugetlb/hugeshmat/hugeshmat04.c
> > 
> > diff --git a/runtest/hugetlb b/runtest/hugetlb
> > index 3eaf14c..805141d 100644
> > --- a/runtest/hugetlb
> > +++ b/runtest/hugetlb
> > @@ -10,6 +10,7 @@ hugemmap05_3 hugemmap05 -s -m
> >  hugeshmat01 hugeshmat01 -i 5
> >  hugeshmat02 hugeshmat02 -i 5
> >  hugeshmat03 hugeshmat03 -i 5
> > +hugeshmat04 hugeshamt04 -i 5
> >  
> >  hugeshmctl01 hugeshmctl01 -i 5
> >  hugeshmctl02 hugeshmctl02 -i 5
> > diff --git a/testcases/kernel/mem/.gitignore
> > b/testcases/kernel/mem/.gitignore
> > index f96964c..c531563 100644
> > --- a/testcases/kernel/mem/.gitignore
> > +++ b/testcases/kernel/mem/.gitignore
> > @@ -6,6 +6,7 @@
> >  /hugetlb/hugeshmat/hugeshmat01
> >  /hugetlb/hugeshmat/hugeshmat02
> >  /hugetlb/hugeshmat/hugeshmat03
> > +/hugetlb/hugeshmat/hugeshmat04
> >  /hugetlb/hugeshmctl/hugeshmctl01
> >  /hugetlb/hugeshmctl/hugeshmctl02
> >  /hugetlb/hugeshmctl/hugeshmctl03
> > diff --git a/testcases/kernel/mem/hugetlb/hugeshmat/hugeshmat04.c
> > b/testcases/kernel/mem/hugetlb/hugeshmat/hugeshmat04.c
> > new file mode 100644
> > index 0000000..515947b
> > --- /dev/null
> > +++ b/testcases/kernel/mem/hugetlb/hugeshmat/hugeshmat04.c
> > @@ -0,0 +1,185 @@
> > +/*
> > + *   Copyright (c) Linux Test Project, 2014
> > + *
> > + *   This program is free software;  you can redistribute it and/or modify
> > + *   it under the terms of the GNU General Public License as published by
> > + *   the Free Software Foundation; either version 2 of the License, or
> > + *   (at your option) any later version.
> > + *
> > + *   This program is distributed in the hope that it will be useful,
> > + *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
> > + *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
> > + *   the GNU General Public License for more details.
> > + *
> > + *   You should have received a copy of the GNU General Public License
> > + *   along with this program;  if not, write to the Free Software
> > + *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> > 02110-1301 USA
> > + */
> > +
> > +/*
> > + * NAME
> > + * 	hugeshmat04.c
> > + *
> > + * DESCRIPTION
> > + *	hugeshmat04 - test for hugepage leak inspection.
> > + *
> > + *      Description of Problem:
> > + *          When over 1GB shered memory was alocated in hugepage, the
> > hugepage
> > + *          is not released though process finished.
> > + *
> > + *          You need more than 2GB memory in test job
> > + *
> > + *	Return value:
> > + *	  0: 	 Test successed.  No regression found.
> > + *	  1: 	 Test failed.  Maybe memory shortage.  Please retry testing.
> > + *	  2: 	 Test failed.  Regression detected.
> > + *	  other: Test failed.  Other problem detected.
> > + *
> > + * HISTORY
> > + * 	05/2014 - Written by Fujistu Corp.
> > + *     	12/2014 - Port to LTP by Li Wang.
> > + *
> > + * RESTRICTIONS
> > + * 	test must be run at root
> > + */
> > +
> > +#include <stdio.h>
> > +#include <stdlib.h>
> > +#include <unistd.h>
> > +#include <fcntl.h>
> > +#include <string.h>
> > +#include <sys/mman.h>
> > +#include <sys/types.h>
> > +#include <sys/shm.h>
> > +#include <sys/wait.h>
> > +
> > +#include "test.h"
> > +#include "mem.h"
> > +
> > +#define SIZE	(1024 * 1024 * 1024)
> > +#define BOUNDARY (1024 * 1024 * 1024)
> > +
> > +char *TCID = "hugeshmat04";
> > +int TST_TOTAL = 3;
> > +
> > +static int huge_total;
> > +static int huge_free;
> > +static int huge_free2;
> > +static long hugepages;
> > +static long orig_hugepages;
> > +
> > +static int shared_hugepage(void);
> > +
> > +
> > +int main(int ac, char **av)
> > +{
> > +	int lc, i, ret;
> > +	const char *msg;
> > +
> > +	msg = parse_opts(ac,av, NULL, NULL);
> > +	if (msg != NULL)
> > +		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
> > +
> > +	setup();
> > +
> > +	for (lc = 0; TEST_LOOPING(lc); lc++) {
> > +		tst_count = 0;
> > +
> > +		for (i = 0; i < TST_TOTAL; i++) {
> > +			huge_total = read_meminfo("HugePages_Total:");
> > +			huge_free = read_meminfo("HugePages_Free:");
> > +
> > +			if (huge_total == hugepages && huge_free == hugepages) {
> > +				ret = shared_hugepage();
> > +
> > +				huge_free2 = read_meminfo("HugePages_Free:");
> > +				if (huge_free2 != huge_free)
> > +					ret = 2;
> > +			} else {
> > +				ret = 1;
> > +			}
> > +
> > +			switch (ret) {
> > +			case 0:
> > +				tst_resm(TPASS,
> > +					"No regression found.");
> > +				break;
> > +			case 1:
> > +				tst_brkm(TFAIL, cleanup,
> > +					"Test failed. Maybe memory shortage.");
> > +				break;
> > +			case 2:
> > +				tst_brkm(TFAIL, cleanup,
> > +					"Test failed. Hugepage leak inspection.");
> > +				break;
> > +			default:
> > +				tst_brkm(TFAIL, cleanup,
> > +					"Test failed. Other problem detected.");
> > +				break;
> > +			}
> > +
> > +		}
> > +	}
> > +	cleanup();
> > +	tst_exit();
> > +}
> > +
> > +int shared_hugepage(void)
> > +{
> > +	pid_t pid;
> > +	int status, shmid;
> > +	size_t size = (size_t)SIZE;
> > +	void *buf;
> > +
> > +	shmid = shmget(IPC_PRIVATE, size, SHM_HUGETLB | IPC_CREAT | 0777);
> > +	if (shmid < 0)
> > +		tst_brkm(TBROK | TERRNO, cleanup, "shmget");
> > +
> > +	buf = shmat(shmid, (void *)BOUNDARY, SHM_RND | 0777);
> > +	if ( buf == (void *)-1 ) {
> > +		shmctl(shmid, IPC_RMID, NULL);
> > +		tst_brkm(TBROK | TERRNO, cleanup, "shmat");
> > +	}
> > +
> > +	memset(buf, 2, size);
> > +	sleep(3);
> > +	pid = fork();
> > +
> > +	if (pid == 0)
> > +	        exit(1);
> > +	else if (pid < 0)
> > +	 	tst_brkm(TBROK | TERRNO, cleanup, "fork");
> > +
> > +	wait(&status);
> > +	shmdt(buf);
> > +	shmctl(shmid, IPC_RMID, NULL);
> > +
> > +	return 0;
> > +}
> > +
> > +void setup(void)
> > +{
> > +	long mem_total, hpage_size;
> > +
> > +	tst_require_root(NULL);
> > +
> > +	mem_total = read_meminfo("MemTotal:");
> > +	if (mem_total < 2097152) {
> > +		tst_resm(TINFO, "Total memory should greater than 2G.");
> > +		tst_exit();
> > +	}
> > +
> > +	orig_hugepages = get_sys_tune("nr_hugepages");
> > +	hpage_size = read_meminfo("Hugepagesize:");
> > +
> > +	hugepages = (orig_hugepages * hpage_size + 1048576) / hpage_size;
> > +	set_sys_tune("nr_hugepages", hugepages, 1);
> > +
> > +	TEST_PAUSE;
> > +}
> > +
> > +void cleanup(void)
> > +{
> > +	TEST_CLEANUP;
> > +	set_sys_tune("nr_hugepages", orig_hugepages, 0);
> > +}
> > --
> > 1.8.3.1
> > 
> > 
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look and join the conversation now. http://goparallel.sourceforge.net
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