From: Oleg Nesterov <oleg@redhat.com>
To: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: srikar@linux.vnet.ibm.com, rostedt@goodmis.org,
mhiramat@kernel.org, peterz@infradead.org, mingo@redhat.com,
acme@kernel.org, alexander.shishkin@linux.intel.com,
jolsa@redhat.com, namhyung@kernel.org,
linux-kernel@vger.kernel.org, corbet@lwn.net,
linux-doc@vger.kernel.org, ananth@linux.vnet.ibm.com,
alexis.berlemont@gmail.com, naveen.n.rao@linux.vnet.ibm.com
Subject: Re: [PATCH 0/7] Uprobes: Support SDT markers having reference count (semaphore)
Date: Fri, 8 Jun 2018 18:36:01 +0200 [thread overview]
Message-ID: <20180608163600.GA9030@redhat.com> (raw)
In-Reply-To: <20180606083344.31320-1-ravi.bangoria@linux.ibm.com>
Hello,
I am travelling till the end of the next week, can't read this version
until I return. Just one question,
On 06/06, Ravi Bangoria wrote:
>
> 1. One of the major reason was the deadlock between uprobe_lock and
> mm->mmap inside trace_uprobe_mmap(). That deadlock was not easy to fix
Could you remind what exactly was wrong?
I can't find your previous email about this problem, but iirc you didn't
explain the deadlock in details, just copied some traces from lockdep...
Oleg.
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next prev parent reply other threads:[~2018-06-08 16:36 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-06 8:33 [PATCH 0/7] Uprobes: Support SDT markers having reference count (semaphore) Ravi Bangoria
2018-06-06 8:33 ` [PATCH 1/7] Uprobes: Simplify uprobe_register() body Ravi Bangoria
2018-06-06 8:33 ` [PATCH 2/7] Uprobes: Support SDT markers having reference count (semaphore) Ravi Bangoria
2018-06-06 8:33 ` [PATCH 3/7] Uprobes/sdt: Fix multiple update of same reference counter Ravi Bangoria
2018-06-06 8:33 ` [PATCH 4/7] trace_uprobe/sdt: Prevent multiple reference counter for same uprobe Ravi Bangoria
2018-06-06 8:33 ` [PATCH 5/7] Uprobes/sdt: " Ravi Bangoria
2018-06-06 8:33 ` [PATCH 6/7] Uprobes/sdt: Document about reference counter Ravi Bangoria
2018-06-06 8:33 ` [PATCH 7/7] perf probe: Support SDT markers having reference counter (semaphore) Ravi Bangoria
2018-06-06 8:35 ` [PATCH 0/7] Uprobes: Support SDT markers having reference count (semaphore) Ravi Bangoria
2018-06-08 1:10 ` Masami Hiramatsu
2018-06-08 2:29 ` Ravi Bangoria
2018-06-08 5:14 ` Masami Hiramatsu
2018-06-08 6:34 ` Ravi Bangoria
2018-06-08 15:45 ` Masami Hiramatsu
2018-06-11 4:31 ` Ravi Bangoria
2018-06-16 13:50 ` Masami Hiramatsu
2018-06-16 15:07 ` Ravi Bangoria
2018-06-08 16:36 ` Oleg Nesterov [this message]
2018-06-11 4:13 ` Ravi Bangoria
2018-06-20 16:37 ` Steven Rostedt
2018-06-21 2:35 ` Ravi Bangoria
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