From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Jed Davis <jld@mozilla.com>,
Will Deacon <will.deacon@arm.com>,
Russell King <rmk+kernel@arm.linux.org.uk>
Subject: [ 17/18] ARM: 7765/1: perf: Record the user-mode PC in the call chain.
Date: Thu, 18 Jul 2013 19:23:32 -0700 [thread overview]
Message-ID: <20130719021050.137138539@linuxfoundation.org> (raw)
In-Reply-To: <20130719021048.965829361@linuxfoundation.org>
3.0-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jed Davis <jld@mozilla.com>
commit c5f927a6f62196226915f12194c9d0df4e2210d7 upstream.
With this change, we no longer lose the innermost entry in the user-mode
part of the call chain. See also the x86 port, which includes the ip.
It's possible to partially work around this problem by post-processing
the data to use the PERF_SAMPLE_IP value, but this works only if the CPU
wasn't in the kernel when the sample was taken.
Signed-off-by: Jed Davis <jld@mozilla.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/arm/kernel/perf_event.c | 1 +
1 file changed, 1 insertion(+)
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -741,6 +741,7 @@ perf_callchain_user(struct perf_callchai
struct frame_tail __user *tail;
+ perf_callchain_store(entry, regs->ARM_pc);
tail = (struct frame_tail __user *)regs->ARM_fp - 1;
while ((entry->nr < PERF_MAX_STACK_DEPTH) &&
next prev parent reply other threads:[~2013-07-19 2:32 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-19 2:23 [ 00/18] 3.0.87-stable review Greg Kroah-Hartman
2013-07-19 2:23 ` [ 01/18] jbd2: fix theoretical race in jbd2__journal_restart Greg Kroah-Hartman
2013-07-19 2:23 ` [ 02/18] ext3,ext4: dont mess with dir_file->f_pos in htree_dirblock_to_tree() Greg Kroah-Hartman
2013-07-19 2:23 ` [ 03/18] USB: option,qcserial: move Novatel Gobi1K IDs to qcserial Greg Kroah-Hartman
2013-07-19 2:23 ` [ 04/18] usb: gadget: f_mass_storage: add missing memory barrier for thread_wakeup_needed Greg Kroah-Hartman
2013-07-19 2:23 ` [ 05/18] xhci: check for failed dma pool allocation Greg Kroah-Hartman
2013-07-19 2:23 ` [ 06/18] pcmcia: at91_cf: fix gpio_get_value in at91_cf_get_status Greg Kroah-Hartman
2013-07-19 2:23 ` [ 07/18] xen/time: remove blocked time accounting from xen "clockchip" Greg Kroah-Hartman
2013-07-19 2:23 ` [ 08/18] genirq: Fix can_request_irq() for IRQs without an action Greg Kroah-Hartman
2013-07-19 2:23 ` [ 09/18] drivers/rtc/rtc-rv3029c2.c: fix disabling AIE irq Greg Kroah-Hartman
2013-07-19 2:23 ` [ 10/18] ACPI / EC: Add HP Folio 13 to ec_dmi_table in order to skip DSDT scan Greg Kroah-Hartman
2013-07-22 16:13 ` Luis Henriques
2013-07-23 4:21 ` Ben Hutchings
2013-07-23 10:57 ` Rafael J. Wysocki
2013-07-19 2:23 ` [ 11/18] ocfs2: xattr: fix inlined xattr reflink Greg Kroah-Hartman
2013-07-19 2:23 ` [ 12/18] ahci: Add AMD CZ SATA device ID Greg Kroah-Hartman
2013-07-19 2:23 ` [ 13/18] ahci: remove pmp link online check in FBS EH Greg Kroah-Hartman
2013-07-19 2:23 ` [ 14/18] timer: Fix jiffies wrap behavior of round_jiffies_common() Greg Kroah-Hartman
2013-07-19 2:23 ` [ 15/18] ext4: fix data offset overflow in ext4_xattr_fiemap() on 32-bit archs Greg Kroah-Hartman
2013-07-19 2:23 ` [ 16/18] ext4: fix overflow when counting used blocks on 32-bit architectures Greg Kroah-Hartman
2013-07-19 2:23 ` Greg Kroah-Hartman [this message]
2013-07-19 2:23 ` [ 18/18] drivers/dma/pl330.c: fix locking in pl330_free_chan_resources() Greg Kroah-Hartman
2013-07-19 23:57 ` [ 00/18] 3.0.87-stable review Shuah Khan
2013-07-21 2:02 ` Satoru Takeuchi
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