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Wong" , zlang@redhat.com Cc: fstests@vger.kernel.org, linux-xfs@vger.kernel.org Date: Fri, 24 Oct 2025 14:48:00 +0530 In-Reply-To: <176054618045.2391029.13403718073912452422.stgit@frogsfrogsfrogs> References: <176054617853.2391029.10911105763476647916.stgit@frogsfrogsfrogs> <176054618045.2391029.13403718073912452422.stgit@frogsfrogsfrogs> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.28.5 (3.28.5-27.el8_10) Precedence: bulk X-Mailing-List: linux-xfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Transfer-Encoding: 7bit On Wed, 2025-10-15 at 09:38 -0700, Darrick J. Wong wrote: > From: Darrick J. Wong > > In this predicate, we should test an atomic write of the minimum > supported size, not just 4k. This fixes a problem where none of the > atomic write tests actually run on a 32k-fsblock xfs because you can't > do a sub-fsblock atomic write. > > Cc: # v2025.04.13 > Fixes: d90ee3b6496346 ("generic: add a test for atomic writes") > Signed-off-by: "Darrick J. Wong" > --- > common/rc | 14 +++++++++++--- > 1 file changed, 11 insertions(+), 3 deletions(-) > > > diff --git a/common/rc b/common/rc > index 1b78cd0c358bb9..dcae5bc33b19ce 100644 > --- a/common/rc > +++ b/common/rc > @@ -3030,16 +3030,24 @@ _require_xfs_io_command() > "pwrite") > # -N (RWF_NOWAIT) only works with direct vectored I/O writes > local pwrite_opts=" " > + local write_size="4k" > if [ "$param" == "-N" ]; then > opts+=" -d" > - pwrite_opts+="-V 1 -b 4k" > + pwrite_opts+="-V 1 -b $write_size" Nit: We can still keep this to 4k (or any random size and not necessarily a size = fsblocksize), right? > fi > if [ "$param" == "-A" ]; then > opts+=" -d" > - pwrite_opts+="-V 1 -b 4k" > + # try to write the minimum supported atomic write size > + write_size="$($XFS_IO_PROG -f -c "statx -r -m $STATX_WRITE_ATOMIC" $testfile 2>/dev/null | \ > + grep atomic_write_unit_min | \ > + grep -o '[0-9]\+')" > + if [ -z "$write_size" ] || [ "$write_size" = "0" ]; then > + write_size="0 --not-supported" > + fi > + pwrite_opts+="-V 1 -b $write_size" > fi > testio=`$XFS_IO_PROG -f $opts -c \ > - "pwrite $pwrite_opts $param 0 4k" $testfile 2>&1` > + "pwrite $pwrite_opts $param 0 $write_size" $testfile 2>&1` This looks good to me: Reviewed-by: Nirjhar Roy (IBM) > param_checked="$pwrite_opts $param" > ;; > "scrub"|"repair") >