From: Mika Westerberg <mika.westerberg@linux.intel.com>
To: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Linux ACPI <linux-acpi@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
"Krogerus, Heikki" <heikki.krogerus@linux.intel.com>,
"Kenneth R. Crudup" <kenny@panix.com>
Subject: Re: [PATCH] ACPI: OSL: Prevent acpi_release_memory() from returning too early
Date: Mon, 24 Aug 2020 17:06:35 +0300 [thread overview]
Message-ID: <20200824140635.GN1375436@lahna.fi.intel.com> (raw)
In-Reply-To: <6142241.0H6QnnlUA7@kreacher>
On Fri, Aug 21, 2020 at 07:42:55PM +0200, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
>
> After commit 1757659d022b ("ACPI: OSL: Implement deferred unmapping
> of ACPI memory") in some cases acpi_release_memory() may return
> before the target memory mappings actually go away, because they
> are released asynchronously now.
>
> Prevent it from returning prematurely by making it wait for the next
> RCU grace period to elapse, for all of the RCU callbacks to complete
> and for all of the scheduled work items to be flushed before
> returning.
>
> Fixes: 1757659d022b ("ACPI: OSL: Implement deferred unmapping of ACPI memory")
> Reported-by: Kenneth R. Crudup <kenny@panix.com>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
prev parent reply other threads:[~2020-08-24 14:06 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-21 17:42 [PATCH] ACPI: OSL: Prevent acpi_release_memory() from returning too early Rafael J. Wysocki
2020-08-21 18:28 ` Kenneth R. Crudup
2020-08-24 8:50 ` Heikki Krogerus
2020-08-24 14:06 ` Mika Westerberg [this message]
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