1/6: numtasks_init Hooks up with Resource Groups core by defining the basic alloc/free functions and registering the controller with the core. --
Signed-Off-By: Chandra Seetharaman <[EMAIL PROTECTED]> Signed-Off-By: Matt Helsley <[EMAIL PROTECTED]> init/Kconfig | 10 ++++ kernel/res_group/Makefile | 1 kernel/res_group/numtasks.c | 90 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 101 insertions(+) Index: linux-2617-rc3/kernel/res_group/Makefile =================================================================== --- linux-2617-rc3.orig/kernel/res_group/Makefile 2006-04-27 10:14:38.000000000 -0700 +++ linux-2617-rc3/kernel/res_group/Makefile 2006-04-27 10:18:49.000000000 -0700 @@ -1,2 +1,3 @@ obj-y = res_group.o shares.o task.o +obj-$(CONFIG_RES_GROUPS_NUMTASKS) += numtasks.o obj-$(CONFIG_RGCS) += rgcs.o Index: linux-2617-rc3/kernel/res_group/numtasks.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ linux-2617-rc3/kernel/res_group/numtasks.c 2006-04-27 10:18:49.000000000 -0700 @@ -0,0 +1,90 @@ +/* numtasks.c - "Number of tasks" resource controller for Resource Groups + * + * Copyright (C) Chandra Seetharaman, IBM Corp. 2003-2006 + * (C) Matt Helsley, IBM Corp. 2006 + * + * Latest version, more details at http://ckrm.sf.net + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ + +/* + * Resource controller for tracking number of tasks in a resource group. + */ +#include <linux/module.h> +#include <linux/res_group_rc.h> + +static const char res_ctlr_name[] = "numtasks"; + +struct numtasks { + struct res_shares shares; +}; + +struct res_controller numtasks_ctlr; + +static struct numtasks *get_shares_numtasks(struct res_shares *shares) +{ + if (shares) + return container_of(shares, struct numtasks, shares); + return NULL; +} + +/* Initialize share struct values */ +static void numtasks_res_init_one(struct numtasks *numtasks_res) +{ + numtasks_res->shares.min_shares = SHARE_DONT_CARE; + numtasks_res->shares.max_shares = SHARE_DONT_CARE; + numtasks_res->shares.child_shares_divisor = SHARE_DEFAULT_DIVISOR; + numtasks_res->shares.unused_min_shares = SHARE_DEFAULT_DIVISOR; +} + +static struct res_shares *numtasks_alloc_shares_struct( + struct resource_group *rgroup) +{ + struct numtasks *res; + + res = kzalloc(sizeof(struct numtasks), GFP_KERNEL); + if (!res) + return NULL; + numtasks_res_init_one(res); + return &res->shares; +} + +/* + * No locking of this resource group object necessary as we are not + * supposed to be assigned (or used) when/after this function is called. + */ +static void numtasks_free_shares_struct(struct res_shares *my_res) +{ + kfree(get_shares_numtasks(my_res)); +} + +struct res_controller numtasks_ctlr = { + .name = res_ctlr_name, + .depth_supported = 3, + .ctlr_id = NO_RES_ID, + .alloc_shares_struct = numtasks_alloc_shares_struct, + .free_shares_struct = numtasks_free_shares_struct, +}; + +int __init init_numtasks_res(void) +{ + if (numtasks_ctlr.ctlr_id != NO_RES_ID) + return -EBUSY; /* already registered */ + return register_controller(&numtasks_ctlr); +} + +void __exit exit_numtasks_res(void) +{ + int rc; + do { + rc = unregister_controller(&numtasks_ctlr); + } while (rc == -EBUSY); + BUG_ON(rc != 0); +} +module_init(init_numtasks_res) +module_exit(exit_numtasks_res) Index: linux-2617-rc3/init/Kconfig =================================================================== --- linux-2617-rc3.orig/init/Kconfig 2006-04-27 10:17:11.000000000 -0700 +++ linux-2617-rc3/init/Kconfig 2006-04-27 10:18:49.000000000 -0700 @@ -175,6 +175,16 @@ config RGCS Say M if unsure, Y to save on module loading. N doesn't make sense when Resource Groups has been configured. +config RES_GROUPS_NUMTASKS + bool "Number of Tasks Resource Controller" + depends on RES_GROUPS + default y + help + Provides a Resource Controller for Resource Groups that allows + limiting number of tasks a resource group can have. + + Say N if unsure, Y to use the feature. + endmenu config SYSCTL bool "Sysctl support" -- ---------------------------------------------------------------------- Chandra Seetharaman | Be careful what you choose.... - [EMAIL PROTECTED] | .......you may get it. ---------------------------------------------------------------------- ------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ ckrm-tech mailing list https://lists.sourceforge.net/lists/listinfo/ckrm-tech
