1/6: ckrm_numtasks_init Hooks up with CKRM 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/ckrm/Makefile | 1 kernel/ckrm/ckrm_numtasks.c | 90 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 101 insertions(+) Index: linux2617-rc2/kernel/ckrm/Makefile =================================================================== --- linux2617-rc2.orig/kernel/ckrm/Makefile +++ linux2617-rc2/kernel/ckrm/Makefile @@ -1,2 +1,3 @@ obj-y = ckrm.o ckrm_shares.o ckrm_task.o +obj-$(CONFIG_CKRM_RES_NUMTASKS) += ckrm_numtasks.o obj-$(CONFIG_CKRM_RCFS) += ckrm_rcfs.o Index: linux2617-rc2/kernel/ckrm/ckrm_numtasks.c =================================================================== --- /dev/null +++ linux2617-rc2/kernel/ckrm/ckrm_numtasks.c @@ -0,0 +1,90 @@ +/* ckrm_numtasks.c - "Number of tasks" resource controller for CKRM + * + * 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. + * + */ + +/* + * CKRM Resource controller for tracking number of tasks in a class. + */ +#include <linux/module.h> +#include <linux/ckrm_rc.h> + +static const char res_ctlr_name[] = "numtasks"; + +struct ckrm_numtasks { + struct ckrm_shares shares; +}; + +struct ckrm_controller numtasks_ctlr; + +static struct ckrm_numtasks *get_shares_numtasks(struct ckrm_shares *shares) +{ + if (shares) + return container_of(shares, struct ckrm_numtasks, shares); + return NULL; +} + +/* Initialize share struct values */ +static void numtasks_res_init_one(struct ckrm_numtasks *numtasks_res) +{ + numtasks_res->shares.min_shares = CKRM_SHARE_DONT_CARE; + numtasks_res->shares.max_shares = CKRM_SHARE_DONT_CARE; + numtasks_res->shares.child_shares_divisor = CKRM_SHARE_DEFAULT_DIVISOR; + numtasks_res->shares.unused_min_shares = CKRM_SHARE_DEFAULT_DIVISOR; +} + +static struct ckrm_shares *numtasks_alloc_shares_struct( + struct ckrm_class *class) +{ + struct ckrm_numtasks *res; + + res = kzalloc(sizeof(struct ckrm_numtasks), GFP_KERNEL); + if (!res) + return NULL; + numtasks_res_init_one(res); + return &res->shares; +} + +/* + * No locking of this resource class 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 ckrm_shares *my_res) +{ + kfree(get_shares_numtasks(my_res)); +} + +struct ckrm_controller numtasks_ctlr = { + .name = res_ctlr_name, + .depth_supported = 3, + .ctlr_id = CKRM_NO_RES_ID, + .alloc_shares_struct = numtasks_alloc_shares_struct, + .free_shares_struct = numtasks_free_shares_struct, +}; + +int __init init_ckrm_numtasks_res(void) +{ + if (numtasks_ctlr.ctlr_id != CKRM_NO_RES_ID) + return -EBUSY; /* already registered */ + return ckrm_register_controller(&numtasks_ctlr); +} + +void __exit exit_ckrm_numtasks_res(void) +{ + int rc; + do { + rc = ckrm_unregister_controller(&numtasks_ctlr); + } while (rc == -EBUSY); + BUG_ON(rc != 0); +} +module_init(init_ckrm_numtasks_res) +module_exit(exit_ckrm_numtasks_res) Index: linux2617-rc2/init/Kconfig =================================================================== --- linux2617-rc2.orig/init/Kconfig +++ linux2617-rc2/init/Kconfig @@ -175,6 +175,16 @@ config CKRM_RCFS Say M if unsure, Y to save on module loading. N doesn't make sense when CKRM has been configured. +config CKRM_RES_NUMTASKS + bool "Number of Tasks Resource Manager" + depends on CKRM + default y + help + Provides a Resource Controller for CKRM that allows limiting no of + tasks a task class 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
