Messages in this thread Patch in this message | | | Date | Thu, 09 Nov 2006 20:09:22 +0300 | From | Kirill Korotaev <> | Subject | [PATCH 12/13] BC: numtasks accounting |
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Beautifull tasks accounting/limiting beancounter control.
Signed-off-by: Pavel Emelianov <xemul@sw.ru> Signed-off-by: Kirill Korotaev <dev@sw.ru>
---
include/linux/sched.h | 1 + kernel/bc/misc.c | 31 +++++++++++++++++++++++++++++++ 2 files changed, 32 insertions(+)
--- ./include/linux/sched.h.bctasks 2006-11-03 17:47:38.000000000 +0300 +++ ./include/linux/sched.h 2006-11-03 17:51:57.000000000 +0300 @@ -1068,6 +1068,7 @@ int copy_beancounter(struct task_struct #endif #ifdef CONFIG_BEANCOUNTERS struct beancounter *exec_bc; + struct beancounter *task_bc; #endif }; --- ./kernel/bc/misc.c.bctasks 2006-11-03 17:47:38.000000000 +0300 +++ ./kernel/bc/misc.c 2006-11-03 17:51:57.000000000 +0300 @@ -17,6 +17,10 @@ int copy_beancounter(struct task_struct struct beancounter *bc; bc = parent->exec_bc; + if (bc_charge(bc, BC_NUMTASKS, 1, BC_LIMIT)) + return -ENOMEM; + + tsk->task_bc = bc_get(bc); tsk->exec_bc = bc_get(bc); return 0; } @@ -25,6 +29,10 @@ void free_beancounter(struct task_struct { struct beancounter *bc; + bc = tsk->task_bc; + bc_uncharge(bc, BC_NUMTASKS, 1); + bc_put(bc); + bc = tsk->exec_bc; bc_put(bc); } @@ -86,3 +94,26 @@ int bc_task_move(struct task_struct *tsk return err; } EXPORT_SYMBOL(bc_task_move); + +#define BC_NUMTASKS_BARRIER 128 +#define BC_NUMTASKS_LIMIT 128 + +static int bc_task_init(struct beancounter *bc, int i) +{ + bc_init_resource(&bc->bc_parms[BC_NUMTASKS], + BC_NUMTASKS_BARRIER, BC_NUMTASKS_LIMIT); + return 0; +} + +static struct bc_resource bc_task_resource = { + .bcr_name = "numtasks", + .bcr_init = bc_task_init, +}; + +static int __init bc_misc_init_resource(void) +{ + bc_register_resource(BC_NUMTASKS, &bc_task_resource); + return 0; +} + +__initcall(bc_misc_init_resource); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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