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Date: Mon, 4 Jan 2021 10:25:45 -0800 From: "Darrick J. Wong" <darrick.wong@...cle.com> To: Eryu Guan <guan@...u.me> Cc: Ritesh Harjani <riteshh@...ux.ibm.com>, fstests@...r.kernel.org, linux-ext4@...r.kernel.org, linux-xfs@...r.kernel.org, anju@...ux.vnet.ibm.com Subject: Re: [PATCHv2 1/2] common/rc: Add whitelisted FS support in _require_scratch_swapfile() On Sun, Dec 20, 2020 at 11:39:06PM +0800, Eryu Guan wrote: > On Wed, Dec 16, 2020 at 10:53:45AM +0530, Ritesh Harjani wrote: > > > > > > On 12/16/20 10:47 AM, Ritesh Harjani wrote: > > > Filesystems e.g. ext4 and XFS supports swapon by default and an error > > > returned with swapon should be treated as a failure. Hence > > > add ext4/xfs as whitelisted fstype in _require_scratch_swapfile() > > > > > > Signed-off-by: Ritesh Harjani <riteshh@...ux.ibm.com> > > > --- > > > v1->v2: Addressed comments from Eryu @[1] > > > [1]: https://patchwork.kernel.org/project/fstests/cover/cover.1604000570.git.riteshh@linux.ibm.com/ > > > > > > common/rc | 20 ++++++++++++++++---- > > > 1 file changed, 16 insertions(+), 4 deletions(-) > > > > > > diff --git a/common/rc b/common/rc > > > index 33b5b598a198..635b77a005c6 100644 > > > --- a/common/rc > > > +++ b/common/rc > > > @@ -2380,6 +2380,7 @@ _format_swapfile() { > > > # Check that the filesystem supports swapfiles > > > _require_scratch_swapfile() > > > { > > > + local fstyp=$FSTYP > > > _require_scratch > > > _require_command "$MKSWAP_PROG" "mkswap" > > > > > > @@ -2401,10 +2402,21 @@ _require_scratch_swapfile() > > > # Minimum size for mkswap is 10 pages > > > _format_swapfile "$SCRATCH_MNT/swap" $(($(get_page_size) * 10)) > > > > > > - if ! swapon "$SCRATCH_MNT/swap" >/dev/null 2>&1; then > > > - _scratch_unmount > > > - _notrun "swapfiles are not supported" > > > - fi > > > + # For whitelisted fstyp swapon should not fail. I would use a different phase than 'whitelisted', since that doesn't tell us why ext4 and xfs are special: # ext* and xfs have supported all variants of swap files since their # introduction, so swapon should not fail. > > > + case "$fstyp" in $FSTYP, not $fstyp > > > + ext4|xfs) I would also add a few more FSTYPs here, since at least ext2 and ext3 supported swap files. Are there other old fses that do? --D > > > + if ! swapon "$SCRATCH_MNT/swap" >/dev/null 2>&1; then > > > + _scratch_unmount > > > + _fail "swapon failed for $fstyp" > > > > @Eryu, > > As of now I added _fail() if swapon failed for given whitelisting fstype. > > Do you think this is alright, or should I just ignore the error in > > I think it's reasonable. > > But I'd like to leave the patchset on the list for review for another > week, to see if ext4 and/or xfs folks will chime in and have different > thoughts. > > Thanks, > Eryu > > > case of such FS? > > > > > > > > > + fi > > > + ;; > > > + *) > > > + if ! swapon "$SCRATCH_MNT/swap" >/dev/null 2>&1; then > > > + _scratch_unmount > > > + _notrun "swapfiles are not supported" > > > + fi > > > + ;; > > > + esac > > > > > > swapoff "$SCRATCH_MNT/swap" >/dev/null 2>&1 > > > _scratch_unmount > > > -- > > > 2.26.2 > > >
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