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| author | Wanpeng Li <liwanp@linux.vnet.ibm.com> | 2013-04-03 10:16:22 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-04-03 20:38:37 (GMT) |
| commit | 834e3a1cead22c40ad55dad9cd683e42396d45c1 (patch) | |
| tree | 8fe408554bd84a86099ae5a998ea9b844cf053e1 /drivers/staging/zcache/debug.h | |
| parent | 90874fc21ca6ca46058c5039fe78a4155d9a631e (diff) | |
| download | linux-fsl-qoriq-834e3a1cead22c40ad55dad9cd683e42396d45c1.tar.xz | |
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/debug.h')
| -rw-r--r-- | drivers/staging/zcache/debug.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/staging/zcache/debug.h b/drivers/staging/zcache/debug.h index 8ec82d4..ddad92f 100644 --- a/drivers/staging/zcache/debug.h +++ b/drivers/staging/zcache/debug.h @@ -122,6 +122,21 @@ static inline void dec_zcache_pers_zpages(unsigned zpages) zcache_pers_zpages = atomic_sub_return(zpages, &zcache_pers_zpages_atomic); } +extern ssize_t zcache_zero_filled_pages; +static atomic_t zcache_zero_filled_pages_atomic = ATOMIC_INIT(0); +extern ssize_t zcache_zero_filled_pages_max; +static inline void inc_zcache_zero_filled_pages(void) +{ + zcache_zero_filled_pages = atomic_inc_return( + &zcache_zero_filled_pages_atomic); + if (zcache_zero_filled_pages > zcache_zero_filled_pages_max) + zcache_zero_filled_pages_max = zcache_zero_filled_pages; +} +static inline void dec_zcache_zero_filled_pages(void) +{ + zcache_zero_filled_pages = atomic_dec_return( + &zcache_zero_filled_pages_atomic); +} static inline unsigned long curr_pageframes_count(void) { return zcache_pageframes_alloced - @@ -200,6 +215,8 @@ static inline void inc_zcache_eph_zpages(void) { }; static inline void dec_zcache_eph_zpages(unsigned zpages) { }; static inline void inc_zcache_pers_zpages(void) { }; static inline void dec_zcache_pers_zpages(unsigned zpages) { }; +static inline void inc_zcache_zero_filled_pages(void) { }; +static inline void dec_zcache_zero_filled_pages(void) { }; static inline unsigned long curr_pageframes_count(void) { return 0; |