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Sun, 4 Feb 2024 12:33:20 +0000 (UTC) Received: from dovecot-director2.suse.de ([10.150.64.162]) by imap1.dmz-prg2.suse.org with ESMTPSA id 2EFLCRCEv2U8JwAAD6G6ig (envelope-from ); Sun, 04 Feb 2024 12:33:20 +0000 Message-ID: <8bb5e14b-c5fd-4247-9e69-9cf786eb4234@suse.de> Date: Sun, 4 Feb 2024 20:33:20 +0800 Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 15/26] null_blk: Introduce fua attribute Content-Language: en-US To: Damien Le Moal , linux-block@vger.kernel.org, Jens Axboe , linux-scsi@vger.kernel.org, "Martin K . Petersen" , dm-devel@lists.linux.dev, Mike Snitzer Cc: Christoph Hellwig References: <20240202073104.2418230-1-dlemoal@kernel.org> <20240202073104.2418230-16-dlemoal@kernel.org> From: Hannes Reinecke In-Reply-To: <20240202073104.2418230-16-dlemoal@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Authentication-Results: smtp-out1.suse.de; none X-Spam-Level: X-Spam-Score: -1.71 X-Spamd-Result: default: False [-1.71 / 50.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; XM_UA_NO_VERSION(0.01)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; BAYES_HAM(-0.42)[78.26%]; MIME_GOOD(-0.10)[text/plain]; NEURAL_HAM_LONG(-1.00)[-1.000]; RCVD_COUNT_THREE(0.00)[3]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; RCPT_COUNT_SEVEN(0.00)[8]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:email]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_ALL(0.00)[]; MID_RHS_MATCH_FROM(0.00)[] X-Spam-Flag: NO On 2/2/24 15:30, Damien Le Moal wrote: > Add the fua configfs attribute and module parameter to allow > configuring if the device supports FUA or not. Using this attribute > has an effect on the null_blk device only if memory backing is enabled > together with a write cache (cache_size option). > > This new attribute allows configuring a null_blk device with a write > cache but without FUA support. This is convenient to test the block > layer flush machinery. > > Signed-off-by: Damien Le Moal > --- > drivers/block/null_blk/main.c | 12 ++++++++++-- > drivers/block/null_blk/null_blk.h | 1 + > 2 files changed, 11 insertions(+), 2 deletions(-) > Reviewed-by: Hannes Reinecke Cheers, Hannes -- Dr. Hannes Reinecke Kernel Storage Architect hare@suse.de +49 911 74053 688 SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg HRB 36809 (AG Nürnberg), GF: Ivo Totev, Andrew McDonald, Werner Knoblich