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Date: Sat, 7 Mar 2015 19:47:58 +0800 From: Ming Lei <ming.lei@...onical.com> To: Dave Chinner <david@...morbit.com> Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Davidlohr Bueso <dbueso@...e.de>, "Peter Zijlstra (Intel)" <peterz@...radead.org>, Jason Low <jason.low2@...com>, Linus Torvalds <torvalds@...ux-foundation.org>, Michel Lespinasse <walken@...gle.com>, "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>, Tim Chen <tim.c.chen@...ux.intel.com>, Ingo Molnar <mingo@...nel.org>, "Theodore Ts'o" <tytso@....edu> Subject: Re: [PATCH -next] locking/rwsem: don't spin in heavy contention On Sat, Mar 7, 2015 at 5:54 AM, Dave Chinner <david@...morbit.com> wrote: > > If you're getting stuff there, I'd be looking for a bug in ext4, not > the rwsem code. There's no way there should be enough unwritten > extent conversion pending to lock up the system for that length of > time. Especially considering the test has concurrent truncates The time is taken for spinning rwsem, so it is really a rwsem problem, and Jason Low has posted one patch to fix it. Thanks, Ming Lei -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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