From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6C1FC2222A5 for ; Wed, 26 Feb 2025 20:56:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740603417; cv=none; b=VN+drNrUfeNb+GaosLGoiJgmRTo9SEgOd2TyWU+j/0+doBXxeL2qKNxIPiYsqpmXZpguXVdFFQ/aMPkPJbZlyBSp1deB7cS1ZMAZ3v29yVg2vfqTgCi1JHMV38zkV9pGjNd4nvSUEFrvX4S4gBsrMl7WCKB32wLGF2Ba26Y9pfI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740603417; c=relaxed/simple; bh=wtrGav14nqc924JHov6dgFHD0ODvX9k7DwUCy2hUKaE=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=Y5lDdlRbYVpaEpCD6JXYv0eykQp2hxhNa6vXTkov9E70PFVbgEkF1nIqstPg4AQLXzDM9ryqhCNDUfUvQ+IZY9hARg93X9pz/LXhBILm7vACAeL7ziTN8D+yDKfUXOpqUaO3r1TfOUvGMQlK05vOsidHJN7ZzZgQMw5f8qRdwkg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=W5VHZD2d; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="W5VHZD2d" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C4EF9C4CED6; Wed, 26 Feb 2025 20:56:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1740603416; bh=wtrGav14nqc924JHov6dgFHD0ODvX9k7DwUCy2hUKaE=; h=Date:From:To:Cc:Subject:From; b=W5VHZD2d24lyT/7J1H414uYQwX3ntyTleYkyNr0oqJrKryM9GuXvWDKbX6zB5CST+ No4D8BVOBvFNEi9AIVVvvJIwQ9UNe3/lfHDIaXI1PT2b2vL4LbWRZxrYJvgxVxlOcN W4Q/mldBFyfmOSUUtASXXizhfz3eX1cGLG/+GttxmSxGYl37obMZFyHXoGpQwY14wc k77+ta02/OtLapAOpnsiaprbOETTAyXX1/p0dXtRPdH2KRAQotJsqD7Gca5vKcHupi yz0kXblwaZbi35DldGSbK7KjyQJdYWA19SWWaEkogriX1v/Mu6rps+m+f9c99yobru PW1ErVGlTXHLw== Date: Wed, 26 Feb 2025 10:56:55 -1000 From: Tejun Heo To: Linus Torvalds Cc: linux-kernel@vger.kernel.org, David Vernet , Changwoo Min , Andrea Righi Subject: [GIT PULL] sched_ext: A fix for v6.14-rc4 Message-ID: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline The following changes since commit f5717c93a1b999970f3a64d771a1a9ee68cc37d0: sched_ext: Use SCX_CALL_OP_TASK in task_tick_scx (2025-02-13 06:57:33 -1000) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext.git/ tags/sched_ext-for-6.14-rc4-fixes for you to fetch changes up to 8fef0a3b17bb258130a4fcbcb5addf94b25e9ec5: sched_ext: Fix pick_task_scx() picking non-queued tasks when it's called without balance() (2025-02-25 08:28:52 -1000) ---------------------------------------------------------------- sched_ext: A fix for v6.14-rc4 pick_task_scx() has a workaround to avoid stalling when the fair class's balance() says yes but pick_task() says no. The workaround was incorrectly deciding to keep the prev taks running if the task is on SCX even when the task is in a sleeping state, which can lead to several confusing failure modes. Fix it by testing the prev task is currently queued on SCX instead. ---------------------------------------------------------------- Tejun Heo (1): sched_ext: Fix pick_task_scx() picking non-queued tasks when it's called without balance() kernel/sched/ext.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) -- tejun