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Date: Thu, 25 Feb 2016 19:09:40 -0500 From: Steven Rostedt <rostedt@...dmis.org> To: "Shi, Yang" <yang.shi@...aro.org> Cc: tj@...nel.org, jack@...e.cz, axboe@...com, fengguang.wu@...el.com, tglx@...utronix.de, bigeasy@...utronix.de, akpm@...ux-foundation.org, linux-kernel@...r.kernel.org, linux-mm@...ck.org, linux-rt-users@...r.kernel.org, linaro-kernel@...ts.linaro.org Subject: Re: [PATCH] writeback: call writeback tracepoints withoud holding list_lock in wb_writeback() On Thu, 25 Feb 2016 15:54:13 -0800 "Shi, Yang" <yang.shi@...aro.org> wrote: > Can we disable irqs in tracepoints since spin_lock_irqsave is used by > kernfs_* functions. Disabling preemption or irqs is fine a tracepoint. You just can't sleep, which spin_lock_irqsave() would do on the -rt kernel. -- Steve
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