diff options
| author |   austin <austin@azhang.bj.intel.com> | 2008-11-07 05:01:12 -0500 |
|---|---|---|
| committer |   Richard Purdie <rpurdie@linux.intel.com> | 2008-12-01 20:40:32 +0000 |
| commit | 6f7afab062b81ee8822dd2ac84e4f44608fa17be (patch) | |
| tree | 1114043f38180468e367b9e81c301465f82c6e29 | |
| parent | 0c2a3df77b1afee479e60aca02f44acce4e04e45 (diff) | |
| download | openembedded-core-contrib-6f7afab062b81ee8822dd2ac84e4f44608fa17be.tar.gz | |
sreadahead: Add a patch to set the app to io-idle running status.
This patch sets the sreadahead to io-idle stauts when it is running,
so that sreadahead will not preempt IO with other apps.
| -rw-r--r-- | meta-moblin/packages/sreadahead/sreadahead-0.02/set_to_idle.patch | 39 | ||||
| -rw-r--r-- | meta-moblin/packages/sreadahead/sreadahead_0.02.bb | 1 |
2 files changed, 40 insertions, 0 deletions
diff --git a/meta-moblin/packages/sreadahead/sreadahead-0.02/set_to_idle.patch b/meta-moblin/packages/sreadahead/sreadahead-0.02/set_to_idle.patch new file mode 100644 index 0000000000..b48659048a --- /dev/null +++ b/meta-moblin/packages/sreadahead/sreadahead-0.02/set_to_idle.patch @@ -0,0 +1,39 @@ +diff -Naurp sreadahead-0.02/readahead.c sreadahead-0.02-nice/readahead.c +--- sreadahead-0.02/readahead.c 2008-11-06 00:57:17.000000000 -0500 ++++ sreadahead-0.02-nice/readahead.c 2008-11-06 02:28:29.000000000 -0500 +@@ -26,7 +26,18 @@ + #include <errno.h> + + #include "readahead.h" ++#include <sys/syscall.h> + ++# if defined(__i386__) ++# define __NR_ioprio_set 289 ++# elif defined(__x86_64__) ++# define __NR_ioprio_set 251 ++# else ++# error "Unsupported arch" ++# endif ++ ++#define IOPRIO_WHO_PROCESS 1 ++#define IOPRIO_CLASS_SHIFT 13 + #define MAXR 1024 + static struct readahead files[MAXR]; + static unsigned int total_files = 0; +@@ -68,7 +79,15 @@ void *one_thread(void *ptr) + + int main(int argc, char **argv) + { +- FILE *file = fopen("/etc/readahead.packed", "r"); ++ int iopriority = 7; /* hard code for idle */ ++ int iopriority_class = 3; /* 3 stands for idle */ ++ int pid = 0; ++ FILE *file; ++ ++ if (syscall(__NR_ioprio_set, IOPRIO_WHO_PROCESS, pid, iopriority | iopriority_class << IOPRIO_CLASS_SHIFT) == -1) ++ perror("Can not set priority to idle class"); ++ ++ file = fopen("/etc/readahead.packed", "r"); + if (!file) { + perror("Couldnt open /etc/readahead.packed"); + return -errno; diff --git a/meta-moblin/packages/sreadahead/sreadahead_0.02.bb b/meta-moblin/packages/sreadahead/sreadahead_0.02.bb index 1ca5f16557..b7341010aa 100644 --- a/meta-moblin/packages/sreadahead/sreadahead_0.02.bb +++ b/meta-moblin/packages/sreadahead/sreadahead_0.02.bb @@ -9,6 +9,7 @@ inherit update-rc.d SRC_URI = "http://www.moblin.org/sites/all/files/sreadahead-${PV}.tar.gz \ file://sreadahead-0.02-make.patch;patch=1 \ file://readahead_c.patch;patch=1 \ + file://set_to_idle.patch;patch=1 \ file://sreadahead-generate.sh \ file://sreadahead.sh" |