We appear to have a fatal memory leak in ACPI. It's a shame this was
known about in the -rc series but not fixed then.
Dalibor, please raise a full and new report at bugzilla.kernel.org.
> On Sat, 2 Dec 2006 21:51:40 +0100 Dalibor Straka <[EMAIL PROTECTED]> wrote:
> On Thu, Nov 09, 2006 at 02:04:16PM -0800, Andrew Morton wrote:
> >
> > If this bug is still present in 2.6.19-rc5 could you please raise a report
> > at bugzilla.kernel.org?
> >
> > Thanks.
> >
> > On Tue, 19 Sep 2006 23:47:24 +0200
> > Dalibor Straka <[EMAIL PROTECTED]> wrote:
> >
> > > Hello,
> > >
> > > I am often running out of memory. It looks like an ACPI code is guilty:
> > > [EMAIL PROTECTED]:~$ grep -i acpi /proc/slabinfo
> > > Acpi-Operand 3076 3127 64 59 1 : tunables 120 60 8 :
> > > slabdata 53 53 0
> > > Acpi-ParseExt 16 59 64 59 1 : tunables 120 60 8 :
> > > slabdata 1 1 0
> > > Acpi-Parse 76 92 40 92 1 : tunables 120 60 8 :
> > > slabdata 1 1 0
> > > Acpi-State 1644960 1644960 80 48 1 : tunables 120 60 8
> > > : slabdata 34270 34270 0
> > > Acpi-Namespace 1177 1232 32 112 1 : tunables 120 60 8 :
> > > slabdata 11 11 0
> > > [EMAIL PROTECTED]:~$ free
> > > Mem: 899280 892472 6808 0 82212 77936
> > > -/+ buffers/cache: 732324 166956
> > > Swap: 2634620 243052 2404568
> > > [EMAIL PROTECTED]:~$ uname -a
> > > Linux lili 2.6.18-rc7 #1 SMP Sun Sep 17 15:01:00 CEST 2006 x86_64
> > >
> > >
> > > Actualy the Acpi-State's memory is increasing slowly in minutes:
> > > Acpi-State 16176 16176 80 48 1 : tunables 120 60 8 :
> > > slabdata 337 337 0
> > > Acpi-State 18816 18816 80 48 1 : tunables 120 60 8 :
> > > slabdata 392 392 0
> > > Acpi-State 19200 19200 80 48 1 : tunables 120 60 8 :
> > > slabdata 400 400 0
> > > Acpi-State 20160 20160 80 48 1 : tunables 120 60 8 :
> > > slabdata 420 420 0
> > >
> > > I am not familiar with kernel sources, but i can do c pretty well.
> > > BTW: Bios says i have 1024MB, but kernel sees 899MB :-?. The system is
> > > pure HP nx6325. It happens with all the recent kernels .18-rc* .17.* and
> > > debian's distribution 2.6.17-1-amd64-k8-smp.
> > >
> > > Please Cc: to me, I read lkml only when I have a good mood.
>
>
> Hello,
>
> the bug is present again in 2.6.19 but not in 19-rc5 and not in 19-rc6.
> The only thing changed in drivers/acpi/ is osl.c and procesor_perflib.c.
> --- ./processor_perflib.c 2006-09-20 05:42:06.000000000 +0200
> +++ /usr/src/linux-2.6.19/drivers/acpi/processor_perflib.c
> 2006-12-01 00:34:06.000000000 +0100
> @@ -83,10 +83,8 @@
> goto out;
>
> ppc = (unsigned int)pr->performance_platform_limit;
> - if (!ppc)
> - goto out;
>
> - if (ppc > pr->performance->state_count)
> + if (ppc >= pr->performance->state_count)
> goto out;
>
> cpufreq_verify_within_limits(policy, 0,
> --- osl.c 2006-12-02 21:40:57.000000000 +0100
> +++ /usr/src/linux-2.6.19-rc6/drivers/acpi/osl.c 2006-11-18
> 13:38:01.000000000 +0100
> @@ -73,6 +73,7 @@
> static acpi_osd_handler acpi_irq_handler;
> static void *acpi_irq_context;
> static struct workqueue_struct *kacpid_wq;
> +static struct workqueue_struct *kacpi_notify_wq;
>
> acpi_status acpi_os_initialize(void)
> {
> @@ -91,8 +92,9 @@
> return AE_NULL_ENTRY;
> }
> kacpid_wq = create_singlethread_workqueue("kacpid");
> + kacpi_notify_wq = create_singlethread_workqueue("kacpi_notify");
> BUG_ON(!kacpid_wq);
> -
> + BUG_ON(!kacpi_notify_wq);
> return AE_OK;
> }
>
> @@ -104,7 +106,7 @@
> }
>
> destroy_workqueue(kacpid_wq);
> - destroy_workqueue(kacpid_notify_wq);
> + destroy_workqueue(kacpi_notify_wq);
>
> return AE_OK;
> }
> @@ -567,10 +569,7 @@
>
> static void acpi_os_execute_deferred(void *context)
> {
> - struct acpi_os_dpc *dpc = NULL;
> -
> -
> - dpc = (struct acpi_os_dpc *)context;
> + struct acpi_os_dpc *dpc = (struct acpi_os_dpc *)context;
> if (!dpc) {
> printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
> return;
> @@ -605,14 +604,12 @@
> struct acpi_os_dpc *dpc;
> struct work_struct *task;
>
> - ACPI_FUNCTION_TRACE("os_queue_for_execution");
> -
> ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
> "Scheduling function [%p(%p)] for deferred
> execution.\n",
> function, context));
>
> if (!function)
> - return_ACPI_STATUS(AE_BAD_PARAMETER);
> + return AE_BAD_PARAMETER;
>
> /*
> * Allocate/initialize DPC structure. Note that this memory will be
> @@ -625,26 +622,20 @@
> * from the same memory.
> */
>
> - dpc =
> - kmalloc(sizeof(struct acpi_os_dpc) + sizeof(struct work_struct),
> - GFP_ATOMIC);
> + dpc = kmalloc(sizeof(struct acpi_os_dpc) +
> + sizeof(struct work_struct), GFP_ATOMIC);
> if (!dpc)
> - return_ACPI_STATUS(AE_NO_MEMORY);
> -
> + return AE_NO_MEMORY;
> dpc->function = function;
> dpc->context = context;
> -
> task = (void *)(dpc + 1);
> INIT_WORK(task, acpi_os_execute_deferred, (void *)dpc);
> -
> - if (!queue_work(kacpid_wq, task)) {
> - ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
> - "Call to queue_work() failed.\n"));
> - kfree(dpc);
> + if (!queue_work((type == OSL_NOTIFY_HANDLER)?
> + kacpi_notify_wq : kacpid_wq, task)) {
> status = AE_ERROR;
> + kfree(dpc);
> }
> -
> - return_ACPI_STATUS(status);
> + return status;
> }
>
> EXPORT_SYMBOL(acpi_os_execute);
-
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