From 6263203ed6e9ff107129a1ebe613290b342a4465 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Wed, 4 Oct 2006 17:26:15 +0200 Subject: [POWERPC] spufs: Add infrastructure needed for gang scheduling Add the concept of a gang to spufs as a new type of object. So far, this has no impact whatsover on scheduling, but makes it possible to add that later. A new type of object in spufs is now a spu_gang. It is created with the spu_create system call with the flags argument set to SPU_CREATE_GANG (0x2). Inside of a spu_gang, it is then possible to create spu_context objects, which until now was only possible at the root of spufs. There is a new member in struct spu_context pointing to the spu_gang it belongs to, if any. The spu_gang maintains a list of spu_context structures that are its children. This information can then be used in the scheduler in the future. There is still a bug that needs to be resolved in this basic infrastructure regarding the order in which objects are removed. When the spu_gang file descriptor is closed before the spu_context descriptors, we leak the dentry and inode for the gang. Any ideas how to cleanly solve this are appreciated. Signed-off-by: Arnd Bergmann Signed-off-by: Paul Mackerras --- include/asm-powerpc/spu.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'include/asm-powerpc/spu.h') diff --git a/include/asm-powerpc/spu.h b/include/asm-powerpc/spu.h index 87cc21e2194..83b6dae48ef 100644 --- a/include/asm-powerpc/spu.h +++ b/include/asm-powerpc/spu.h @@ -181,7 +181,10 @@ extern struct spufs_calls { * Flags for sys_spu_create. */ #define SPU_CREATE_EVENTS_ENABLED 0x0001 -#define SPU_CREATE_FLAG_ALL 0x0001 /* mask of all valid flags */ +#define SPU_CREATE_GANG 0x0002 + +#define SPU_CREATE_FLAG_ALL 0x0003 /* mask of all valid flags */ + #ifdef CONFIG_SPU_FS_MODULE int register_spu_syscalls(struct spufs_calls *calls); -- cgit v1.2.3-18-g5258