From: Dmitry Safonov <dima@arista.com> To: linux-kernel@vger.kernel.org Cc: Dmitry Safonov <0x7f454c46@gmail.com>, Dmitry Safonov <dima@arista.com>, Adrian Reber <adrian@lisas.de>, Andrei Vagin <avagin@openvz.org>, Andy Lutomirski <luto@kernel.org>, Arnd Bergmann <arnd@arndb.de>, Christian Brauner <christian.brauner@ubuntu.com>, Cyrill Gorcunov <gorcunov@openvz.org>, "Eric W. Biederman" <ebiederm@xmission.com>, "H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>, Jann Horn <jannh@google.com>, Jeff Dike <jdike@addtoit.com>, Oleg Nesterov <oleg@redhat.com>, Pavel Emelyanov <xemul@virtuozzo.com>, Shuah Khan <shuah@kernel.org>, Thomas Gleixner <tglx@linutronix.de>, Vincenzo Frascino <vincenzo.frascino@arm.com>, containers@lists.linux-foundation.org, criu@openvz.org, linux-api@vger.kernel.org, x86@kernel.org, Andrei Vagin <avagin@gmail.com> Subject: [PATCHv8 23/34] time: Allocate per-timens vvar page Date: Tue, 12 Nov 2019 01:27:12 +0000 [thread overview] Message-ID: <20191112012724.250792-24-dima@arista.com> (raw) In-Reply-To: <20191112012724.250792-1-dima@arista.com> VDSO support for Time namespace needs to set up a page with the same layout as VVAR. That timens page will be placed on position of VVAR page inside namespace. That page contains time namespace clock offsets and it has vdso_data->seq set to 1 to enforce the slow path and vdso_data->clock_mode set to VCLOCK_TIMENS to enforce the time namespace handling path. Allocate the timens page during namespace creation. Setup the offsets when the first task enters the ns and freeze them to guarantee the pace of monotonic/boottime clocks and to avoid breakage of applications. The design decision is to have a global offset_lock which is used during namespace offsets set up and to freeze offsets when first task joins the new ns. That is better in terms of memory usage comparing to having per-ns mutex that's used only during the set up period. Suggested-by: Andy Lutomirski <luto@kernel.org> Based-on-work-by: Thomas Gleixner <tglx@linutronix.de> Co-developed-by: Andrei Vagin <avagin@gmail.com> Signed-off-by: Andrei Vagin <avagin@gmail.com> Signed-off-by: Dmitry Safonov <dima@arista.com> --- include/linux/time_namespace.h | 3 + kernel/time/namespace.c | 103 ++++++++++++++++++++++++++++++++- 2 files changed, 105 insertions(+), 1 deletion(-) diff --git a/include/linux/time_namespace.h b/include/linux/time_namespace.h index 90e82654b4ce..cdb438ba0037 100644 --- a/include/linux/time_namespace.h +++ b/include/linux/time_namespace.h @@ -23,6 +23,9 @@ struct time_namespace { struct ucounts *ucounts; struct ns_common ns; struct timens_offsets offsets; + struct page *vvar_page; + /* Disallow changing offsets after any task joined namespace. */ + bool frozen_offsets; } __randomize_layout; extern struct time_namespace init_time_ns; diff --git a/kernel/time/namespace.c b/kernel/time/namespace.c index 1a0fbaa5d2d4..e14cd1ca387d 100644 --- a/kernel/time/namespace.c +++ b/kernel/time/namespace.c @@ -15,6 +15,7 @@ #include <linux/cred.h> #include <linux/err.h> #include <linux/mm.h> +#include <vdso/datapage.h> ktime_t do_timens_ktime_to_host(clockid_t clockid, ktime_t tim, struct timens_offsets *ns_offsets) @@ -90,16 +91,23 @@ static struct time_namespace *clone_time_ns(struct user_namespace *user_ns, kref_init(&ns->kref); + ns->vvar_page = alloc_page(GFP_KERNEL | __GFP_ZERO); + if (!ns->vvar_page) + goto fail_free; + err = ns_alloc_inum(&ns->ns); if (err) - goto fail_free; + goto fail_free_page; ns->ucounts = ucounts; ns->ns.ops = &timens_operations; ns->user_ns = get_user_ns(user_ns); ns->offsets = old_ns->offsets; + ns->frozen_offsets = false; return ns; +fail_free_page: + __free_page(ns->vvar_page); fail_free: kfree(ns); fail_dec: @@ -128,6 +136,93 @@ struct time_namespace *copy_time_ns(unsigned long flags, return clone_time_ns(user_ns, old_ns); } +static struct timens_offset offset_from_ts(struct timespec64 off) +{ + struct timens_offset ret; + + ret.sec = off.tv_sec; + ret.nsec = off.tv_nsec; + + return ret; +} + +/* + * A time namespace VVAR page has the same layout as the VVAR page which + * contains the system wide VDSO data. + * + * For a normal task the VVAR pages are installed in the normal ordering: + * VVAR + * PVCLOCK + * HVCLOCK + * TIMENS <- Not really required + * + * Now for a timens task the pages are installed in the following order: + * TIMENS + * PVCLOCK + * HVCLOCK + * VVAR + * + * The check for vdso_data->clock_mode is in the unlikely path of + * the seq begin magic. So for the non-timens case most of the time + * 'seq' is even, so the branch is not taken. + * + * If 'seq' is odd, i.e. a concurrent update is in progress, the extra check + * for vdso_data->clock_mode is a non-issue. The task is spin waiting for the + * update to finish and for 'seq' to become even anyway. + * + * Timens page has vdso_data->clock_mode set to VCLOCK_TIMENS which enforces + * the time namespace handling path. + */ +static void timens_setup_vdso_data(struct vdso_data *vdata, + struct time_namespace *ns) +{ + struct timens_offset *offset = vdata->offset; + struct timens_offset monotonic = offset_from_ts(ns->offsets.monotonic); + struct timens_offset boottime = offset_from_ts(ns->offsets.boottime); + + vdata->seq = 1; + vdata->clock_mode = VCLOCK_TIMENS; + offset[CLOCK_MONOTONIC] = monotonic; + offset[CLOCK_MONOTONIC_RAW] = monotonic; + offset[CLOCK_MONOTONIC_COARSE] = monotonic; + offset[CLOCK_BOOTTIME] = boottime; + offset[CLOCK_BOOTTIME_ALARM] = boottime; +} + +/* + * Protects possibly multiple offsets writers racing each other + * and tasks entering the namespace. + */ +static DEFINE_MUTEX(offset_lock); + +static void timens_set_vvar_page(struct task_struct *task, + struct time_namespace *ns) +{ + struct vdso_data *vdata; + unsigned int i; + + if (ns == &init_time_ns) + return; + + /* Fast-path, taken by every task in namespace except the first. */ + if (likely(ns->frozen_offsets)) + return; + + mutex_lock(&offset_lock); + /* Nothing to-do: vvar_page has been already initialized. */ + if (ns->frozen_offsets) + goto out; + + ns->frozen_offsets = true; + vdata = arch_get_vdso_data(page_address(ns->vvar_page)); + + for (i = 0; i < CS_BASES; i++) + timens_setup_vdso_data(&vdata[i], ns); + +out: + mutex_unlock(&offset_lock); +} + void free_time_ns(struct kref *kref) { struct time_namespace *ns; @@ -136,6 +231,7 @@ void free_time_ns(struct kref *kref) dec_time_namespaces(ns->ucounts); put_user_ns(ns->user_ns); ns_free_inum(&ns->ns); + __free_page(ns->vvar_page); kfree(ns); } @@ -192,6 +288,8 @@ static int timens_install(struct nsproxy *nsproxy, struct ns_common *new) !ns_capable(current_user_ns(), CAP_SYS_ADMIN)) return -EPERM; + timens_set_vvar_page(current, ns); + get_time_ns(ns); put_time_ns(nsproxy->time_ns); nsproxy->time_ns = ns; @@ -211,6 +309,8 @@ int timens_on_fork(struct nsproxy *nsproxy, struct task_struct *tsk) if (nsproxy->time_ns == nsproxy->time_ns_for_children) return 0; + timens_set_vvar_page(tsk, ns); + get_time_ns(ns); put_time_ns(nsproxy->time_ns); nsproxy->time_ns = ns; @@ -246,6 +346,7 @@ struct time_namespace init_time_ns = { .user_ns = &init_user_ns, .ns.inum = PROC_TIME_INIT_INO, .ns.ops = &timens_operations, + .frozen_offsets = true, }; static int __init time_ns_init(void) -- 2.24.0
WARNING: multiple messages have this Message-ID (diff)
From: Dmitry Safonov <dima@arista.com> To: linux-kernel@vger.kernel.org Cc: Dmitry Safonov <0x7f454c46@gmail.com>, Dmitry Safonov <dima@arista.com>, Adrian Reber <adrian@lisas.de>, Andrei Vagin <avagin@openvz.org>, Andy Lutomirski <luto@kernel.org>, Arnd Bergmann <arnd@arndb.de>, Christian Brauner <christian.brauner@ubuntu.com>, Cyrill Gorcunov <gorcunov@openvz.org>, "Eric W. Biederman" <ebiederm@xmission.com>, "H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>, Jann Horn <jannh@google.com>, Jeff Dike <jdike@addtoit.com>, Oleg Nesterov <oleg@redhat.com>, Pavel Emelyanov <xemul@virtuozzo.com>, Shuah Khan <shuah@kernel.org>, Thomas Gleixner <tglx@linutronix.de>, Vincenzo Frascino <vincenzo.frascino@arm.com>, containers@lists.linux-foundation.org, criu@openvz.org, linux-api@vger.kernel.org, x86@kernel.org Subject: [PATCHv8 23/34] time: Allocate per-timens vvar page Date: Tue, 12 Nov 2019 01:27:12 +0000 [thread overview] Message-ID: <20191112012724.250792-24-dima@arista.com> (raw) In-Reply-To: <20191112012724.250792-1-dima@arista.com> VDSO support for Time namespace needs to set up a page with the same layout as VVAR. That timens page will be placed on position of VVAR page inside namespace. That page contains time namespace clock offsets and it has vdso_data->seq set to 1 to enforce the slow path and vdso_data->clock_mode set to VCLOCK_TIMENS to enforce the time namespace handling path. Allocate the timens page during namespace creation. Setup the offsets when the first task enters the ns and freeze them to guarantee the pace of monotonic/boottime clocks and to avoid breakage of applications. The design decision is to have a global offset_lock which is used during namespace offsets set up and to freeze offsets when first task joins the new ns. That is better in terms of memory usage comparing to having per-ns mutex that's used only during the set up period. Suggested-by: Andy Lutomirski <luto@kernel.org> Based-on-work-by: Thomas Gleixner <tglx@linutronix.de> Co-developed-by: Andrei Vagin <avagin@gmail.com> Signed-off-by: Andrei Vagin <avagin@gmail.com> Signed-off-by: Dmitry Safonov <dima@arista.com> --- include/linux/time_namespace.h | 3 + kernel/time/namespace.c | 103 ++++++++++++++++++++++++++++++++- 2 files changed, 105 insertions(+), 1 deletion(-) diff --git a/include/linux/time_namespace.h b/include/linux/time_namespace.h index 90e82654b4ce..cdb438ba0037 100644 --- a/include/linux/time_namespace.h +++ b/include/linux/time_namespace.h @@ -23,6 +23,9 @@ struct time_namespace { struct ucounts *ucounts; struct ns_common ns; struct timens_offsets offsets; + struct page *vvar_page; + /* Disallow changing offsets after any task joined namespace. */ + bool frozen_offsets; } __randomize_layout; extern struct time_namespace init_time_ns; diff --git a/kernel/time/namespace.c b/kernel/time/namespace.c index 1a0fbaa5d2d4..e14cd1ca387d 100644 --- a/kernel/time/namespace.c +++ b/kernel/time/namespace.c @@ -15,6 +15,7 @@ #include <linux/cred.h> #include <linux/err.h> #include <linux/mm.h> +#include <vdso/datapage.h> ktime_t do_timens_ktime_to_host(clockid_t clockid, ktime_t tim, struct timens_offsets *ns_offsets) @@ -90,16 +91,23 @@ static struct time_namespace *clone_time_ns(struct user_namespace *user_ns, kref_init(&ns->kref); + ns->vvar_page = alloc_page(GFP_KERNEL | __GFP_ZERO); + if (!ns->vvar_page) + goto fail_free; + err = ns_alloc_inum(&ns->ns); if (err) - goto fail_free; + goto fail_free_page; ns->ucounts = ucounts; ns->ns.ops = &timens_operations; ns->user_ns = get_user_ns(user_ns); ns->offsets = old_ns->offsets; + ns->frozen_offsets = false; return ns; +fail_free_page: + __free_page(ns->vvar_page); fail_free: kfree(ns); fail_dec: @@ -128,6 +136,93 @@ struct time_namespace *copy_time_ns(unsigned long flags, return clone_time_ns(user_ns, old_ns); } +static struct timens_offset offset_from_ts(struct timespec64 off) +{ + struct timens_offset ret; + + ret.sec = off.tv_sec; + ret.nsec = off.tv_nsec; + + return ret; +} + +/* + * A time namespace VVAR page has the same layout as the VVAR page which + * contains the system wide VDSO data. + * + * For a normal task the VVAR pages are installed in the normal ordering: + * VVAR + * PVCLOCK + * HVCLOCK + * TIMENS <- Not really required + * + * Now for a timens task the pages are installed in the following order: + * TIMENS + * PVCLOCK + * HVCLOCK + * VVAR + * + * The check for vdso_data->clock_mode is in the unlikely path of + * the seq begin magic. So for the non-timens case most of the time + * 'seq' is even, so the branch is not taken. + * + * If 'seq' is odd, i.e. a concurrent update is in progress, the extra check + * for vdso_data->clock_mode is a non-issue. The task is spin waiting for the + * update to finish and for 'seq' to become even anyway. + * + * Timens page has vdso_data->clock_mode set to VCLOCK_TIMENS which enforces + * the time namespace handling path. + */ +static void timens_setup_vdso_data(struct vdso_data *vdata, + struct time_namespace *ns) +{ + struct timens_offset *offset = vdata->offset; + struct timens_offset monotonic = offset_from_ts(ns->offsets.monotonic); + struct timens_offset boottime = offset_from_ts(ns->offsets.boottime); + + vdata->seq = 1; + vdata->clock_mode = VCLOCK_TIMENS; + offset[CLOCK_MONOTONIC] = monotonic; + offset[CLOCK_MONOTONIC_RAW] = monotonic; + offset[CLOCK_MONOTONIC_COARSE] = monotonic; + offset[CLOCK_BOOTTIME] = boottime; + offset[CLOCK_BOOTTIME_ALARM] = boottime; +} + +/* + * Protects possibly multiple offsets writers racing each other + * and tasks entering the namespace. + */ +static DEFINE_MUTEX(offset_lock); + +static void timens_set_vvar_page(struct task_struct *task, + struct time_namespace *ns) +{ + struct vdso_data *vdata; + unsigned int i; + + if (ns == &init_time_ns) + return; + + /* Fast-path, taken by every task in namespace except the first. */ + if (likely(ns->frozen_offsets)) + return; + + mutex_lock(&offset_lock); + /* Nothing to-do: vvar_page has been already initialized. */ + if (ns->frozen_offsets) + goto out; + + ns->frozen_offsets = true; + vdata = arch_get_vdso_data(page_address(ns->vvar_page)); + + for (i = 0; i < CS_BASES; i++) + timens_setup_vdso_data(&vdata[i], ns); + +out: + mutex_unlock(&offset_lock); +} + void free_time_ns(struct kref *kref) { struct time_namespace *ns; @@ -136,6 +231,7 @@ void free_time_ns(struct kref *kref) dec_time_namespaces(ns->ucounts); put_user_ns(ns->user_ns); ns_free_inum(&ns->ns); + __free_page(ns->vvar_page); kfree(ns); } @@ -192,6 +288,8 @@ static int timens_install(struct nsproxy *nsproxy, struct ns_common *new) !ns_capable(current_user_ns(), CAP_SYS_ADMIN)) return -EPERM; + timens_set_vvar_page(current, ns); + get_time_ns(ns); put_time_ns(nsproxy->time_ns); nsproxy->time_ns = ns; @@ -211,6 +309,8 @@ int timens_on_fork(struct nsproxy *nsproxy, struct task_struct *tsk) if (nsproxy->time_ns == nsproxy->time_ns_for_children) return 0; + timens_set_vvar_page(tsk, ns); + get_time_ns(ns); put_time_ns(nsproxy->time_ns); nsproxy->time_ns = ns; @@ -246,6 +346,7 @@ struct time_namespace init_time_ns = { .user_ns = &init_user_ns, .ns.inum = PROC_TIME_INIT_INO, .ns.ops = &timens_operations, + .frozen_offsets = true, }; static int __init time_ns_init(void) -- 2.24.0
next prev parent reply other threads:[~2019-11-12 1:28 UTC|newest] Thread overview: 160+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-11-12 1:26 [PATCHv8 00/34] kernel: Introduce Time Namespace Dmitry Safonov 2019-11-12 1:26 ` Dmitry Safonov 2019-11-12 1:26 ` [PATCHv8 01/34] lib/vdso: Add unlikely() hint into vdso_read_begin() Dmitry Safonov 2019-11-12 1:26 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2019-11-12 1:26 ` [PATCHv8 02/34] lib/vdso: make do_hres and do_coarse as __always_inline Dmitry Safonov 2019-11-12 1:26 ` Dmitry Safonov 2020-01-10 9:45 ` Vincenzo Frascino 2020-01-10 9:45 ` Vincenzo Frascino 2020-01-10 11:42 ` Thomas Gleixner 2020-01-10 11:47 ` Vincenzo Frascino 2020-01-10 11:47 ` Vincenzo Frascino 2020-01-10 12:02 ` Thomas Gleixner 2020-01-10 12:18 ` Vincenzo Frascino 2020-01-10 12:18 ` Vincenzo Frascino 2020-01-13 5:27 ` Andrei Vagin 2020-01-13 5:27 ` Andrei Vagin 2020-01-13 19:09 ` [tip: timers/core] lib/vdso: Mark do_hres() and do_coarse() " tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2019-11-12 1:26 ` [PATCHv8 03/34] ns: Introduce Time Namespace Dmitry Safonov 2019-11-12 1:26 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2020-01-27 14:12 ` [PATCHv8 03/34] " Dmitry Vyukov 2020-01-27 14:12 ` Dmitry Vyukov 2020-01-27 14:19 ` Dmitry Safonov 2020-01-27 14:19 ` Dmitry Safonov 2020-02-17 14:20 ` Time Namespaces: CLONE_NEWTIME and clone3()? Michael Kerrisk 2020-02-17 14:59 ` Christian Brauner 2020-02-17 21:47 ` Michael Kerrisk (man-pages) 2020-02-17 23:03 ` Christian Brauner 2020-02-17 23:29 ` Thomas Gleixner 2020-02-18 2:37 ` Eric W. Biederman 2020-02-18 17:11 ` Adrian Reber 2020-02-18 17:26 ` Christian Brauner 2019-11-12 1:26 ` [PATCHv8 04/34] time: Add timens_offsets to be used for tasks in timens Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] time: Add timens_offsets to be used for tasks in time namespace tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2019-11-12 1:26 ` [PATCHv8 05/34] posix-clocks: Rename the clock_get() callback to clock_get_timespec() Dmitry Safonov 2019-11-12 1:26 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2019-11-12 1:26 ` [PATCHv8 06/34] posix-clocks: Rename .clock_get_timespec() callbacks accordingly Dmitry Safonov 2019-11-12 1:26 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2019-11-12 1:26 ` [PATCHv8 07/34] alarmtimer: Rename gettime() callback to get_ktime() Dmitry Safonov 2019-11-12 1:26 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2019-11-12 1:26 ` [PATCHv8 08/34] alarmtimer: Provide get_timespec() callback Dmitry Safonov 2019-11-12 1:26 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2019-11-12 1:26 ` [PATCHv8 09/34] posix-clocks: Introduce clock_get_ktime() callback Dmitry Safonov 2019-11-12 1:26 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2019-11-12 1:26 ` [PATCHv8 10/34] posix-timers: Use clock_get_ktime() in common_timer_get() Dmitry Safonov 2019-11-12 1:26 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2019-11-12 1:27 ` [PATCHv8 11/34] posix-clocks: Wire up clock_gettime() with timens offsets Dmitry Safonov 2019-11-12 1:27 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2019-11-12 1:27 ` [PATCHv8 12/34] kernel: Add do_timens_ktime_to_host() helper Dmitry Safonov 2019-11-12 1:27 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] time: " tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2019-11-12 1:27 ` [PATCHv8 13/34] timerfd: Make timerfd_settime() time namespace aware Dmitry Safonov 2019-11-12 1:27 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2019-11-12 1:27 ` [PATCHv8 14/34] posix-timers: Make timer_settime() " Dmitry Safonov 2019-11-12 1:27 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2019-11-12 1:27 ` [PATCHv8 15/34] alarmtimer: Make nanosleep " Dmitry Safonov 2019-11-12 1:27 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] alarmtimer: Make nanosleep() " tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2019-11-12 1:27 ` [PATCHv8 16/34] hrtimers: Prepare hrtimer_nanosleep() for time namespaces Dmitry Safonov 2019-11-12 1:27 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2019-11-12 1:27 ` [PATCHv8 17/34] posix-timers: Make clock_nanosleep() time namespace aware Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2019-11-12 1:27 ` [PATCHv8 18/34] fs/proc: Respect boottime inside time namespace for /proc/uptime Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Dmitry Safonov 2020-01-14 13:02 ` tip-bot2 for Dmitry Safonov 2019-11-12 1:27 ` [PATCHv8 19/34] x86/vdso: Restrict splitting VVAR VMA Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Dmitry Safonov 2020-01-14 13:02 ` tip-bot2 for Dmitry Safonov 2019-11-12 1:27 ` [PATCHv8 20/34] lib/vdso: Prepare for time namespace support Dmitry Safonov 2019-11-12 1:27 ` Dmitry Safonov 2020-01-12 10:32 ` Thomas Gleixner 2020-01-12 10:32 ` Thomas Gleixner 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner 2020-01-14 13:02 ` tip-bot2 for Thomas Gleixner 2019-11-12 1:27 ` [PATCHv8 21/34] x86/vdso: Provide vdso_data offset on vvar_page Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Dmitry Safonov 2020-01-14 13:02 ` tip-bot2 for Dmitry Safonov 2019-11-12 1:27 ` [PATCHv8 22/34] x86/vdso: Add timens page Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] x86/vdso: Add time napespace page tip-bot2 for Dmitry Safonov 2020-01-14 13:02 ` tip-bot2 for Dmitry Safonov 2019-11-12 1:27 ` Dmitry Safonov [this message] 2019-11-12 1:27 ` [PATCHv8 23/34] time: Allocate per-timens vvar page Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Dmitry Safonov 2020-01-14 13:02 ` tip-bot2 for Dmitry Safonov 2019-11-12 1:27 ` [PATCHv8 24/34] x86/vdso: Handle faults on timens page Dmitry Safonov 2019-11-12 1:27 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Dmitry Safonov 2020-01-14 13:02 ` tip-bot2 for Dmitry Safonov 2019-11-12 1:27 ` [PATCHv8 25/34] x86/vdso: On timens page fault prefault also VVAR page Dmitry Safonov 2019-11-12 1:27 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Dmitry Safonov 2020-01-14 13:02 ` tip-bot2 for Dmitry Safonov 2019-11-12 1:27 ` [PATCHv8 26/34] x86/vdso: Zap vvar pages on switch a time namspace Dmitry Safonov 2019-11-12 1:27 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] x86/vdso: Zap vvar pages when switching to a time namespace tip-bot2 for Dmitry Safonov 2020-01-14 13:02 ` tip-bot2 for Dmitry Safonov 2019-11-12 1:27 ` [PATCHv8 27/34] fs/proc: Introduce /proc/pid/timens_offsets Dmitry Safonov 2019-11-12 1:27 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2019-11-12 1:27 ` [PATCHv8 28/34] selftests/timens: Add Time Namespace test for supported clocks Dmitry Safonov 2019-11-12 1:27 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Dmitry Safonov 2020-01-14 13:02 ` tip-bot2 for Dmitry Safonov 2019-11-12 1:27 ` [PATCHv8 29/34] selftests/timens: Add a test for timerfd Dmitry Safonov 2019-11-12 1:27 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2019-11-12 1:27 ` [PATCHv8 30/34] selftests/timens: Add a test for clock_nanosleep() Dmitry Safonov 2019-11-12 1:27 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2019-11-12 1:27 ` [PATCHv8 31/34] selftests/timens: Add procfs selftest Dmitry Safonov 2019-11-12 1:27 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Dmitry Safonov 2020-01-14 13:02 ` tip-bot2 for Dmitry Safonov 2019-11-12 1:27 ` [PATCHv8 32/34] selftests/timens: Add timer offsets test Dmitry Safonov 2019-11-12 1:27 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2019-11-12 1:27 ` [PATCHv8 33/34] selftests/timens: Add a simple perf test for clock_gettime() Dmitry Safonov 2019-11-12 1:27 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2019-11-12 1:27 ` [PATCHv8 34/34] selftests/timens: Check for right timens offsets after fork and exec Dmitry Safonov 2019-11-12 1:27 ` Dmitry Safonov 2020-01-13 19:09 ` [tip: timers/core] " tip-bot2 for Andrei Vagin 2020-01-14 13:02 ` tip-bot2 for Andrei Vagin 2019-11-21 18:05 ` [PATCHv8 00/34] kernel: Introduce Time Namespace Andrei Vagin 2019-12-11 20:38 ` Dmitry Safonov 2020-01-09 21:09 ` Thomas Gleixner 2020-01-10 9:52 ` Vincenzo Frascino
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