diff options
| author | Vladimir Davydov <[email protected]> | 2015-09-09 15:35:51 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2015-09-10 13:29:01 -0700 |
| commit | d3691d2c6d3e72624c987bbef6f322631bbb2d5d (patch) | |
| tree | f87defd1e939131c6c46ab826ec0f901f59cbc95 | |
| parent | f074a8f49eb87cde95ac9d040ad5e7ea4f029738 (diff) | |
proc: add cond_resched to /proc/kpage* read/write loop
Reading/writing a /proc/kpage* file may take long on machines with a lot
of RAM installed.
Signed-off-by: Vladimir Davydov <[email protected]>
Suggested-by: Andres Lagar-Cavilla <[email protected]>
Reviewed-by: Andres Lagar-Cavilla <[email protected]>
Cc: Minchan Kim <[email protected]>
Cc: Raghavendra K T <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Greg Thelen <[email protected]>
Cc: Michel Lespinasse <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Pavel Emelyanov <[email protected]>
Cc: Cyrill Gorcunov <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | fs/proc/page.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/proc/page.c b/fs/proc/page.c index 0b8286450a93..93484034a03d 100644 --- a/fs/proc/page.c +++ b/fs/proc/page.c @@ -58,6 +58,8 @@ static ssize_t kpagecount_read(struct file *file, char __user *buf, pfn++; out++; count -= KPMSIZE; + + cond_resched(); } *ppos += (char __user *)out - buf; @@ -219,6 +221,8 @@ static ssize_t kpageflags_read(struct file *file, char __user *buf, pfn++; out++; count -= KPMSIZE; + + cond_resched(); } *ppos += (char __user *)out - buf; @@ -267,6 +271,8 @@ static ssize_t kpagecgroup_read(struct file *file, char __user *buf, pfn++; out++; count -= KPMSIZE; + + cond_resched(); } *ppos += (char __user *)out - buf; |