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Wed, 24 Jun 2020 05:37:40 +0000 Received: from sol.localdomain (c-107-3-166-239.hsd1.ca.comcast.net [107.3.166.239]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id DC0C82072E; Wed, 24 Jun 2020 05:37:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592977051; bh=wb4QukjekILuiNOvt3WtAggRANvs3/DPlF6kk/OZN9A=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=ME2/ILyRl01EO6yDPEjuIw5z41jE6WT0YL/dZxeFp1FPcCqTGoXmWlZASWXMdQg+d Gg6ZXHBJaopVsT69BCF292QvgQpMxHWYMvgoHHUbOyO2xDDrO8HZyvDEPplfoZjCZF oVsC9NaAewstXOI+yLeiPyQ9MDInXF4S2T12EQBY= Date: Tue, 23 Jun 2020 22:37:29 -0700 From: Eric Biggers To: Daniel Rosenberg Message-ID: <20200624053729.GE844@sol.localdomain> References: <20200624043341.33364-1-drosen@google.com> <20200624043341.33364-2-drosen@google.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200624043341.33364-2-drosen@google.com> X-Headers-End: 1jny6O-00DiaD-26 Subject: Re: [f2fs-dev] [PATCH v9 1/4] unicode: Add utf8_casefold_hash X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kernel-team@android.com, Theodore Ts'o , Jonathan Corbet , Richard Weinberger , Andreas Dilger , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-fscrypt@vger.kernel.org, linux-mtd@lists.infradead.org, Alexander Viro , linux-fsdevel@vger.kernel.org, Jaegeuk Kim , linux-ext4@vger.kernel.org, Gabriel Krisman Bertazi Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net On Tue, Jun 23, 2020 at 09:33:38PM -0700, Daniel Rosenberg wrote: > This adds a case insensitive hash function to allow taking the hash > without needing to allocate a casefolded copy of the string. It would be helpful to add a few more details in this commit message. Somewhat along the lines of: ->d_hash() for casefolding currently allocates memory, it needs to use GFP_ATOMIC due to ->d_hash() being called in rcu-walk mode, this is unreliable and inefficient, and this patch allows solving that problem by removing the need to allocate memory. - Eric _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel