From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f180.google.com (mail-pl1-f180.google.com [209.85.214.180]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B3B7E8F5A for ; Wed, 19 Feb 2025 00:11:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.180 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739923868; cv=none; b=QVTC9WL8O/C6I6PV0MVwbdfXMQwLw5wK9uELDRkyURSDdnuSUoh6h245z4KO3f1ShetnpSoi9VKitXkwtYSdWk3E9RsaH1758mFDmZ8D1hfrS56j2sho1O0RH4GUxVtDg/p8zyBCw3FjoGRMld1gWCSLwogyug8DXB7nNM1OS+s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739923868; c=relaxed/simple; bh=GKth8OgfzFdg1eI08wTLXySe0/ivwrF4OJZlEoIUS3g=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=YwiTBQNX7LxeaxWMnysg8iHpK3aERTXr5WN7t1JysaX6jybqE6sSIlxbDSZ3aPxgg87/Gq/EJer/9X8WvjZdJ5GJuljAMpebzEnybGRzGhSkB8BsvuRvF60u/bWlzQgArAnW3OG16vCg/kLJ+ncAoKmwJ2sLPE8jaww1632e9sU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=fromorbit.com; spf=pass smtp.mailfrom=fromorbit.com; dkim=pass (2048-bit key) header.d=fromorbit-com.20230601.gappssmtp.com header.i=@fromorbit-com.20230601.gappssmtp.com header.b=CSaauxeo; arc=none smtp.client-ip=209.85.214.180 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=fromorbit.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=fromorbit.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=fromorbit-com.20230601.gappssmtp.com header.i=@fromorbit-com.20230601.gappssmtp.com header.b="CSaauxeo" Received: by mail-pl1-f180.google.com with SMTP id d9443c01a7336-2212a930001so71469235ad.0 for ; Tue, 18 Feb 2025 16:11:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fromorbit-com.20230601.gappssmtp.com; s=20230601; t=1739923866; x=1740528666; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=Wje+37OUw3EOY3E8DdGEm6PdRUyXBW2L3woHBy7T6PU=; b=CSaauxeosHvEhvX7OJSF9HR/qn2/ZC5RoSq5l5l69nbJreEo6zEzKaYQE1VeGlM8qO BfELA0Ur6tlUHqwaF766krLn+YOUDQ/GlfakF6txn0jRFi1F8p+8c9z0mVf9pruWe6MZ UPY9g/M3AB12EvW9Kvyu0zTwN/0miKCvrpWFwcDrW70deVgwZGcFCgbuugjQEheX9hxT OFLDofbRAdf3/gQOa3dVwQEzLaki2zusN6lYU5hSVD0NW3cwmKjnvhOEsiQnJxlipmmF ZlnXJE08/RCyjRIPQbSvLUsd7B09JYYVXS5qd0JM32xpph4fKoc6yKywmWvabmar+tEU 2z/g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1739923866; x=1740528666; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=Wje+37OUw3EOY3E8DdGEm6PdRUyXBW2L3woHBy7T6PU=; b=NF1CPgbanIbTYJc72XqSzKRUeSZvWDqDojqIc+IpaPhgSaoprDz/V8jWdGBP+Wamyi 9Kkz9Vgta65ofL9RJq2emTkRRhkDOHzorcrcCBLH+VTTRwdeqLUUhDlvBdmx8y18dGEX xPv6NQ7YhBk+Yjba8Ky/+cXaXpwDXGliY4ZwNp5Cnb0SH43mjxbK8Qk0vnBoJIR2PTC/ ecW1ZfuPR3UI8zea4764OdgB6YhY/z0m8z0RVsYINJoW7A/08ay4tyCNN5UXQu6ViIr5 ru12oAQ3Z4LAi+zjI3sYuRE3cijA16F/lPq4CW7FDvATeQYA1eR0QwqwMNQ88SBKxZth un6w== X-Forwarded-Encrypted: i=1; AJvYcCUNGpbhNrwlGCDf3h/s4YLnWmb3hubAh0RhyoqSwqqb9tpJsYEB8O+iRV3wtW69jYXuXuDf3KVML3p7M9U=@vger.kernel.org X-Gm-Message-State: AOJu0Yxq9rn+hT6lkHFBX7wVi/+ISTu5yE2D4+cdaPJciVNe3Ohj1c7+ 14kdbO0meW/NFatGcIA0Z4yzfN9AUdD1v0wGaPj2mAWC0zDMhh+YTaMrS4MlGNujcWpMmUTxSMc x X-Gm-Gg: ASbGncvoHqbo2vARldbUe5c0ycB0veHua11y1F2ksOYLJiDDq2vrvopqKfjMBwXGg/f /rdtUz0Y4jrdvDhxw8ZdrVacLx5m1aIuFUQtLO3m9TQGxyGmSw5M0P6La39HAP+Vz8DiHNHO70e r5h1TYf111u6oVjJruvrjU8y9Xt4m5SZppRMyDJNtq4wknUh7But2gJzSya2yXbaOO+Nn7Tia8T y3TPzFQ6655MFJmVN0Z2fJCWAiloPvc4yhr0UZKb2aHdozpMRhjOot/WpXzc+H2M2mBofk907ms LhlQavlMXCOPSlV2a/IY8tDInWzmWFplIEC5qrqiHFONwWj+s+jcVRMU+1glkaOu/T8= X-Google-Smtp-Source: AGHT+IGzNw9N6vIVHFFoSDN7U/7f25cr4Ncvov37jFAYdeOGbe9w5NFdAS1CNJKBD1dXb4wW4OuzXQ== X-Received: by 2002:a05:6a00:3d42:b0:730:8d0c:1066 with SMTP id d2e1a72fcca58-73261911238mr28880688b3a.24.1739923865977; Tue, 18 Feb 2025 16:11:05 -0800 (PST) Received: from dread.disaster.area (pa49-186-89-135.pa.vic.optusnet.com.au. [49.186.89.135]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-73272a28fe5sm5802089b3a.101.2025.02.18.16.11.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 Feb 2025 16:11:05 -0800 (PST) Received: from dave by dread.disaster.area with local (Exim 4.98) (envelope-from ) id 1tkXg7-0000000314I-00od; Wed, 19 Feb 2025 11:11:03 +1100 Date: Wed, 19 Feb 2025 11:11:02 +1100 From: Dave Chinner To: Jingbo Xu Cc: axboe@kernel.dk, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, brauner@kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk Subject: Re: [PATCH 2/2] mm/truncate: don't skip dirty page in folio_unmap_invalidate() Message-ID: References: <20250218120209.88093-1-jefflexu@linux.alibaba.com> <20250218120209.88093-3-jefflexu@linux.alibaba.com> 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 In-Reply-To: <20250218120209.88093-3-jefflexu@linux.alibaba.com> On Tue, Feb 18, 2025 at 08:02:09PM +0800, Jingbo Xu wrote: > ... otherwise this is a behavior change for the previous callers of > invalidate_complete_folio2(), e.g. the page invalidation routine. > > Fixes: 4a9e23159fd3 ("mm/truncate: add folio_unmap_invalidate() helper") > Signed-off-by: Jingbo Xu > --- > mm/truncate.c | 2 -- > 1 file changed, 2 deletions(-) > > diff --git a/mm/truncate.c b/mm/truncate.c > index e2e115adfbc5..76d8fcd89bd0 100644 > --- a/mm/truncate.c > +++ b/mm/truncate.c > @@ -548,8 +548,6 @@ int folio_unmap_invalidate(struct address_space *mapping, struct folio *folio, > > VM_BUG_ON_FOLIO(!folio_test_locked(folio), folio); > > - if (folio_test_dirty(folio)) > - return 0; Shouldn't that actually return -EBUSY because the folio could not be invalidated? Indeed, further down the function the folio gets locked and the dirty test is repeated. If it fails there it returns -EBUSY.... -Dave. -- Dave Chinner david@fromorbit.com