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: liw...@redhat.com ----- Original Message ----- > > > > > ----- Original Message ----- > > From: "Li Wang" <liw...@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 <liw...@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 > > > > > > ------------------------------------------------------------------------------ > > Dive into the World of Parallel Programming! 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