From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 6883E32E122 for ; Tue, 17 Feb 2026 14:48:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771339723; cv=none; b=q92nTcSjZh8xiEmaO3+DLrjt86w0U66+EE2iwGERrqFo8HT+3iI4mIrfrSP+bgN7UJyDYKUuzyM4sMwcvylUqYa3EAEk9gnPuabydf8ro9pmUhN4od7yEVoR08lZGD5d75weGXLHwy0P/51knQiFcENFhJawmVu89mmfZduzzsI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771339723; c=relaxed/simple; bh=OrTFABK9LZ6F4Wf6TeVFi5KNuV9aYACVoYkZOjW87Es=; h=From:In-Reply-To:References:To:Cc:Subject:MIME-Version: Content-Type:Date:Message-ID; b=Ju51oKW0QxbA8mPqRrlHGQnnBHzxJ5hJj3FvKe2btGHH1m6Uum+bA2YsJjUq4DubVjz9vmMR9T8fIBQDWi3Z3MppYIiRfO9/MG6GluQNlHnkPi8x5KNOY0S7afksavrF2A1Q5EYPrk3mKDrpGW237XGrivN4d2GldGRBaq46azQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=T8hM9U5i; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="T8hM9U5i" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1771339721; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=Gtk+iypRymX/b8W3W+eyKDme9AzPKzBinCazw2yRtH0=; b=T8hM9U5iBXqTgnCjW11fUnQVTsCvmPeFu0q94XzyDuVyYaC3S5+UEeEDaKM0SOqAtqhj8I ne9rcPnc72SUwr0efoj/n06p6bAkmO0497g0ymYhN+90Kva28u7Og6mZkBpNDoFpgUjQqF ueuix43hnEsE8tv7TlIeTbEn9zl0yf0= Received: from mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-631-2I3I9Oe0NNWW_y23JLrhvg-1; Tue, 17 Feb 2026 09:48:36 -0500 X-MC-Unique: 2I3I9Oe0NNWW_y23JLrhvg-1 X-Mimecast-MFC-AGG-ID: 2I3I9Oe0NNWW_y23JLrhvg_1771339715 Received: from mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.111]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 3A240195DE50; Tue, 17 Feb 2026 14:48:35 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.45.225.173]) by mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 4F43F180058A; Tue, 17 Feb 2026 14:48:32 +0000 (UTC) Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: <2025543.PYKUYFuaPT@weasel> References: <2025543.PYKUYFuaPT@weasel> <20251227180137.730385-1-pierre@barre.sh> To: Christian Schoenebeck Cc: dhowells@redhat.com, ericvh@kernel.org, lucho@ionkov.net, asmadeus@codewreck.org, Pierre Barre , v9fs@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] 9p: fix i_size update race in getattr with writeback caching 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-ID: <1406625.1771339710.1@warthog.procyon.org.uk> Date: Tue, 17 Feb 2026 14:48:30 +0000 Message-ID: <1406626.1771339710@warthog.procyon.org.uk> X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 Christian Schoenebeck wrote: > do > echo $i >> foo.txt & > ls -lha foo.txt & > done > > sync Did you want a wait somewhere? There's no guarantee that the asynchronous processes thereby launched have done anything at the point sync happens. David