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authorWanpeng Li <liwanp@linux.vnet.ibm.com>2013-04-03 18:16:22 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-04-03 13:38:37 -0700
commit834e3a1cead22c40ad55dad9cd683e42396d45c1 (patch)
tree8fe408554bd84a86099ae5a998ea9b844cf053e1 /drivers/staging/zcache/zcache-main.c
parent90874fc21ca6ca46058c5039fe78a4155d9a631e (diff)
downloadlinux-834e3a1cead22c40ad55dad9cd683e42396d45c1.tar.gz
staging: zcache: introduce zero-filled page stat count
Introduce zero-filled page statistics to monitor the number of zero-filled pages. Acked-by: Dan Magenheimer <dan.magenheimer@oracle.com> Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/zcache/zcache-main.c')
-rw-r--r--drivers/staging/zcache/zcache-main.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/staging/zcache/zcache-main.c b/drivers/staging/zcache/zcache-main.c
index 1994cab6edf..f3de76d0707 100644
--- a/drivers/staging/zcache/zcache-main.c
+++ b/drivers/staging/zcache/zcache-main.c
@@ -374,6 +374,7 @@ static void *zcache_pampd_eph_create(char *data, size_t size, bool raw,
if (page_is_zero_filled(page)) {
clen = 0;
zero_filled = true;
+ inc_zcache_zero_filled_pages();
goto got_pampd;
}
@@ -440,6 +441,7 @@ static void *zcache_pampd_pers_create(char *data, size_t size, bool raw,
if (page_is_zero_filled(page)) {
clen = 0;
zero_filled = true;
+ inc_zcache_zero_filled_pages();
goto got_pampd;
}
@@ -652,6 +654,7 @@ static int zcache_pampd_get_data_and_free(char *data, size_t *sizep, bool raw,
zpages = 1;
if (!raw)
*sizep = PAGE_SIZE;
+ dec_zcache_zero_filled_pages();
goto zero_fill;
}
@@ -702,6 +705,7 @@ static void zcache_pampd_free(void *pampd, struct tmem_pool *pool,
zero_filled = true;
zsize = 0;
zpages = 1;
+ dec_zcache_zero_filled_pages();
}
if (pampd_is_remote(pampd) && !zero_filled) {