From: Vasily Tarasov <[EMAIL PROTECTED]> Registers the cfqio_subsys subsystem in the CGroups framework.
Signed-off-by: Vasily Tarasov <[EMAIL PROTECTED]> --- --- /dev/null 2008-02-14 08:57:49.255923728 -0500 +++ linux-2.6.25-rc5-mm1/include/linux/cfqio-cgroup.h 2008-02-15 01:06:40.000000000 -0500 @@ -0,0 +1,26 @@ +/* + * include/linux/cfqio-cgroup.h + * + * cfqio_subsys: CGroup subsystem that allows CFQ recognize + * cgroups and perform scheduling according to this. + * + * Copyright (C) 2008 OpenVZ http://openvz.org + * + * Author: Vasily Tarasov <[EMAIL PROTECTED]> + * + */ + +#ifndef _LINUX_CFQIO_CGROUP_H +#define _LINUX_CFQIO_CGROUP_H + +#define CFQIO_SS_IOPRIO_DEF 4 +#define CFQIO_SS_IOPRIO_MAX 7 +#define CFQIO_SS_IOPRIO_MIN 0 + +/* cfqio_subsys's per cgroup state holder */ +struct cfqio_ss_css { + struct cgroup_subsys_state css; + unsigned int ioprio; +}; + +#endif /* _LINUX_CFQIO_CGROUP_H */ --- linux-2.6.25-rc5-mm1/include/linux/cgroup_subsys.h.subsys 2008-02-15 00:49:56.000000000 -0500 +++ linux-2.6.25-rc5-mm1/include/linux/cgroup_subsys.h 2008-02-15 01:06:40.000000000 -0500 @@ -42,3 +42,9 @@ SUBSYS(mem_cgroup) #endif /* */ + +#ifdef CONFIG_CGROUP_CFQIO +SUBSYS(cfqio) +#endif + +/* */ --- linux-2.6.25-rc5-mm1/block/Makefile.subsys 2008-02-15 00:49:11.000000000 -0500 +++ linux-2.6.25-rc5-mm1/block/Makefile 2008-02-15 01:06:40.000000000 -0500 @@ -11,6 +11,7 @@ obj-$(CONFIG_IOSCHED_NOOP) += noop-iosch obj-$(CONFIG_IOSCHED_AS) += as-iosched.o obj-$(CONFIG_IOSCHED_DEADLINE) += deadline-iosched.o obj-$(CONFIG_IOSCHED_CFQ) += cfq-iosched.o +obj-$(CONFIG_CGROUP_CFQIO) += cfqio-cgroup.o obj-$(CONFIG_BLK_DEV_IO_TRACE) += blktrace.o obj-$(CONFIG_BLOCK_COMPAT) += compat_ioctl.o --- /dev/null 2008-02-14 08:57:49.255923728 -0500 +++ linux-2.6.25-rc5-mm1/block/cfqio-cgroup.c 2008-02-15 01:06:40.000000000 -0500 @@ -0,0 +1,97 @@ +/* + * block/cfqio-cgroup.c + * + * cfqio_cgroup: CGroup subsystem that allows CFQ recognize + * cgroups and perform scheduling according to this. + * + * Copyright (C) 2008 OpenVZ http://openvz.org + * + * Author: Vasily Tarasov <[EMAIL PROTECTED]> + * + */ + +#include <linux/cgroup.h> +#include <linux/cfqio-cgroup.h> +#include <linux/err.h> + +static void cfqio_ss_fini(struct cfqio_ss_css *cfqio_css) +{ +} + +static void cfqio_ss_init(struct cfqio_ss_css *cfqio_css) +{ + cfqio_css->ioprio = CFQIO_SS_IOPRIO_DEF; +} + +static struct cgroup_subsys_state * +cfqio_ss_cgrp_create(struct cgroup_subsys *subsys, struct cgroup *cgrp) +{ + struct cfqio_ss_css *cfqio_css; + + cfqio_css = kmalloc(sizeof(*cfqio_css), GFP_KERNEL); + if (!cfqio_css) + return ERR_PTR(-ENOMEM); + + cfqio_ss_init(cfqio_css); + + return &cfqio_css->css; +} + +static inline struct cfqio_ss_css * +cfqio_ss_cgrp_css(struct cgroup *cgrp) +{ + return container_of(cgrp->subsys[cfqio_subsys_id], + struct cfqio_ss_css, css); +} + +static void +cfqio_ss_cgrp_destroy(struct cgroup_subsys *subsys, struct cgroup *cgrp) +{ + struct cfqio_ss_css *cfqio_css; + + cfqio_css = cfqio_ss_cgrp_css(cgrp); + cfqio_ss_fini(cfqio_css); + kfree(cfqio_css); + return; +} + +static u64 +cfqio_ss_ioprio_read(struct cgroup *cgrp, struct cftype *cft) +{ + return (u64)cfqio_ss_cgrp_css(cgrp)->ioprio; +} + +static int +cfqio_ss_ioprio_write(struct cgroup *cgrp, struct cftype *cft, u64 val) +{ + if (val > CFQIO_SS_IOPRIO_MAX || val < CFQIO_SS_IOPRIO_MIN) + return -EINVAL; + + cfqio_ss_cgrp_css(cgrp)->ioprio = val; + + return 0; +} + +/* array since more then one file are expected in the future */ +static struct cftype cfqio_ss_files[] = { + { + .name = "ioprio", + .read_uint = cfqio_ss_ioprio_read, + .write_uint = cfqio_ss_ioprio_write, + }, +}; + +static int +cfqio_ss_populate_dir(struct cgroup_subsys *ss, struct cgroup *cgrp) +{ + return cgroup_add_files(cgrp, ss, cfqio_ss_files, + ARRAY_SIZE(cfqio_ss_files)); +} + +struct cgroup_subsys cfqio_subsys = { + .name = "cfqio_subsys", + .subsys_id = cfqio_subsys_id, + .create = cfqio_ss_cgrp_create, + .destroy = cfqio_ss_cgrp_destroy, + .populate = cfqio_ss_populate_dir, +}; _______________________________________________ Devel mailing list [email protected] https://openvz.org/mailman/listinfo/devel
