From: Marcelo Tosatti <mtosatti@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Christoph Lameter <cl@linux.com>,
Thomas Gleixner <tglx@linutronix.de>,
Frederic Weisbecker <frederic@kernel.org>,
Juri Lelli <juri.lelli@redhat.com>, Nitesh Lal <nilal@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Nicolas Saenz <nsaenzju@redhat.com>,
Marcelo Tosatti <mtosatti@redhat.com>
Subject: [patch 2/5] common entry: add hook for isolation to __syscall_exit_to_user_mode_work
Date: Wed, 14 Jul 2021 17:42:07 -0300 [thread overview]
Message-ID: <20210714204233.680326225@fuller.cnet> (raw)
In-Reply-To: 20210714204205.245522189@fuller.cnet
This hook will be used by the next patch to perform synchronization
of per-CPU vmstats.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Index: linux-2.6-vmstat-update/kernel/entry/common.c
===================================================================
--- linux-2.6-vmstat-update.orig/kernel/entry/common.c
+++ linux-2.6-vmstat-update/kernel/entry/common.c
@@ -284,9 +284,18 @@ static void syscall_exit_to_user_mode_pr
syscall_exit_work(regs, work);
}
+/*
+ * Isolaton specific exit to user mode preparation. Runs with interrupts
+ * enabled.
+ */
+static void isolation_exit_to_user_mode_prepare(void)
+{
+}
+
static __always_inline void __syscall_exit_to_user_mode_work(struct pt_regs *regs)
{
syscall_exit_to_user_mode_prepare(regs);
+ isolation_exit_to_user_mode_prepare();
local_irq_disable_exit_to_user();
exit_to_user_mode_prepare(regs);
}
next prev parent reply other threads:[~2021-07-14 20:43 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-14 20:42 [patch 0/5] optionally perform deferred actions on return to userspace (v3) Marcelo Tosatti
2021-07-14 20:42 ` [patch 1/5] sched: isolation: introduce quiesce_on_exit_to_usermode isolcpu flags Marcelo Tosatti
2021-07-19 14:14 ` Frederic Weisbecker
2021-07-14 20:42 ` Marcelo Tosatti [this message]
2021-07-14 20:42 ` [patch 3/5] mm: vmstat: optionally flush per-CPU vmstat counters on return to userspace Marcelo Tosatti
2021-07-14 20:42 ` [patch 4/5] mm: vmstat: move need_update Marcelo Tosatti
2021-07-14 20:42 ` [patch 5/5] mm: vmstat_refresh: avoid queueing work item if cpu stats are clean Marcelo Tosatti
-- strict thread matches above, loose matches on Subject: below --
2021-07-09 17:37 [patch 0/5] optionally perform deferred actions on return to userspace Marcelo Tosatti
2021-07-09 17:37 ` [patch 2/5] common entry: add hook for isolation to __syscall_exit_to_user_mode_work Marcelo Tosatti
2021-07-01 21:03 [patch 0/5] optionally sync per-CPU vmstats counter on return to userspace Marcelo Tosatti
2021-07-01 21:03 ` [patch 2/5] common entry: add hook for isolation to __syscall_exit_to_user_mode_work Marcelo Tosatti
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