* [Bug kprobes/2668] New: bugfix of kprobe-booster: reenable kprobe-booster on i386
@ 2006-05-16 21:35 soshima at redhat dot com
2006-05-16 21:37 ` [Bug kprobes/2668] " soshima at redhat dot com
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: soshima at redhat dot com @ 2006-05-16 21:35 UTC (permalink / raw)
To: systemtap
I found another bug in kprobes i386.
kprobe-booster is disabled in current mainline.
Boostability has been disabled since removing #ifdef CONFIG_PREMPT.
This is our fault to have overlooked this issue in review.
--
Summary: bugfix of kprobe-booster: reenable kprobe-booster on
i386
Product: systemtap
Version: unspecified
Status: NEW
Severity: enhancement
Priority: P3
Component: kprobes
AssignedTo: systemtap at sources dot redhat dot com
ReportedBy: soshima at redhat dot com
http://sourceware.org/bugzilla/show_bug.cgi?id=2668
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^ permalink raw reply [flat|nested] 5+ messages in thread* [Bug kprobes/2668] bugfix of kprobe-booster: reenable kprobe-booster on i386
2006-05-16 21:35 [Bug kprobes/2668] New: bugfix of kprobe-booster: reenable kprobe-booster on i386 soshima at redhat dot com
@ 2006-05-16 21:37 ` soshima at redhat dot com
2006-05-17 1:54 ` bibo dot mao at intel dot com
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: soshima at redhat dot com @ 2006-05-16 21:37 UTC (permalink / raw)
To: systemtap
------- Additional Comments From soshima at redhat dot com 2006-05-16 21:37 -------
Created an attachment (id=1030)
--> (http://sourceware.org/bugzilla/attachment.cgi?id=1030&action=view)
re-enable kprobe-booster
This patch re-enable kprobe-booster and is against 2.6.17-rc3-mm1.
--
http://sourceware.org/bugzilla/show_bug.cgi?id=2668
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^ permalink raw reply [flat|nested] 5+ messages in thread* [Bug kprobes/2668] bugfix of kprobe-booster: reenable kprobe-booster on i386
2006-05-16 21:35 [Bug kprobes/2668] New: bugfix of kprobe-booster: reenable kprobe-booster on i386 soshima at redhat dot com
2006-05-16 21:37 ` [Bug kprobes/2668] " soshima at redhat dot com
@ 2006-05-17 1:54 ` bibo dot mao at intel dot com
2006-05-17 2:56 ` bibo dot mao at intel dot com
2006-06-15 16:08 ` soshima at redhat dot com
3 siblings, 0 replies; 5+ messages in thread
From: bibo dot mao at intel dot com @ 2006-05-17 1:54 UTC (permalink / raw)
To: systemtap
------- Additional Comments From bibo dot mao at intel dot com 2006-05-17 01:54 -------
In file include/asm-i386/thread_info.h, default value of preempt_count is 1. if
CONFIG_PREEMPT is not set,I do not know whether its value will be changed in
other places.
--
http://sourceware.org/bugzilla/show_bug.cgi?id=2668
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* [Bug kprobes/2668] bugfix of kprobe-booster: reenable kprobe-booster on i386
2006-05-16 21:35 [Bug kprobes/2668] New: bugfix of kprobe-booster: reenable kprobe-booster on i386 soshima at redhat dot com
2006-05-16 21:37 ` [Bug kprobes/2668] " soshima at redhat dot com
2006-05-17 1:54 ` bibo dot mao at intel dot com
@ 2006-05-17 2:56 ` bibo dot mao at intel dot com
2006-06-15 16:08 ` soshima at redhat dot com
3 siblings, 0 replies; 5+ messages in thread
From: bibo dot mao at intel dot com @ 2006-05-17 2:56 UTC (permalink / raw)
To: systemtap
------- Additional Comments From bibo dot mao at intel dot com 2006-05-17 02:56 -------
Sorry I am wrong :(. By the test it is found that preempt_count is cleared to 0
somewhere. At least in function init_idle() it is set to zero. So your patch is
right for me.
--
http://sourceware.org/bugzilla/show_bug.cgi?id=2668
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* [Bug kprobes/2668] bugfix of kprobe-booster: reenable kprobe-booster on i386
2006-05-16 21:35 [Bug kprobes/2668] New: bugfix of kprobe-booster: reenable kprobe-booster on i386 soshima at redhat dot com
` (2 preceding siblings ...)
2006-05-17 2:56 ` bibo dot mao at intel dot com
@ 2006-06-15 16:08 ` soshima at redhat dot com
3 siblings, 0 replies; 5+ messages in thread
From: soshima at redhat dot com @ 2006-06-15 16:08 UTC (permalink / raw)
To: systemtap
------- Additional Comments From soshima at redhat dot com 2006-06-15 16:07 -------
This bug is fixed in 2.6.17-rc4-mm2.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
http://sourceware.org/bugzilla/show_bug.cgi?id=2668
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2006-05-16 21:35 [Bug kprobes/2668] New: bugfix of kprobe-booster: reenable kprobe-booster on i386 soshima at redhat dot com
2006-05-16 21:37 ` [Bug kprobes/2668] " soshima at redhat dot com
2006-05-17 1:54 ` bibo dot mao at intel dot com
2006-05-17 2:56 ` bibo dot mao at intel dot com
2006-06-15 16:08 ` soshima at redhat dot com
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