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[178.115.52.210]) by smtp.gmail.com with ESMTPSA id m20-20020a05600c4f5400b0038b5162260csm16809052wmq.23.2022.04.09.01.15.34 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 09 Apr 2022 01:15:36 -0700 (PDT) Message-ID: <72e9bd34-3380-e305-65f0-a17306f5bd08@linbit.com> Date: Sat, 9 Apr 2022 10:15:33 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.6.2 Subject: Re: [PATCH 24/27] block: remove QUEUE_FLAG_DISCARD Content-Language: en-US To: Christoph Hellwig Cc: dm-devel@redhat.com, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-um@lists.infradead.org, linux-block@vger.kernel.org, drbd-dev@lists.linbit.com, nbd@other.debian.org, ceph-devel@vger.kernel.org, virtualization@lists.linux-foundation.org, xen-devel@lists.xenproject.org, Jens Axboe , linux-bcache@vger.kernel.org, linux-raid@vger.kernel.org, linux-mmc@vger.kernel.org, linux-mtd@lists.infradead.org, linux-nvme@lists.infradead.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, jfs-discussion@lists.sourceforge.net, linux-nilfs@vger.kernel.org, ntfs3@lists.linux.dev, ocfs2-devel@oss.oracle.com, linux-mm@kvack.org, "Martin K . Petersen" , Coly Li References: <20220409045043.23593-1-hch@lst.de> <20220409045043.23593-25-hch@lst.de> From: =?UTF-8?Q?Christoph_B=c3=b6hmwalder?= In-Reply-To: <20220409045043.23593-25-hch@lst.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org On 09.04.22 06:50, Christoph Hellwig wrote: > Just use a non-zero max_discard_sectors as an indicator for discard > support, similar to what is done for write zeroes. > > The only places where needs special attention is the RAID5 driver, > which must clear discard support for security reasons by default, > even if the default stacking rules would allow for it. > > Signed-off-by: Christoph Hellwig > Reviewed-by: Martin K. Petersen > Acked-by: Christoph Böhmwalder [btrfs] I think you may have a typo there: my ACK was for drbd, not btrfs. > Acked-by: Coly Li [bcache] > --- > arch/um/drivers/ubd_kern.c | 2 -- > block/blk-core.c | 2 +-