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xfs: Add a comment in xfs_log_sb()

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Add a comment explaining why the sb_frextents are updated outside the
if (xfs_has_lazycount(mp) check even though it is a lazycounter.
RT groups are supported only in v5 filesystems which always have
lazycounter enabled - so putting it inside the if(xfs_has_lazycount(mp)
check is redundant.

Suggested-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nirjhar Roy (IBM) <nirjhar.roy.lists@gmail.com>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
This commit is contained in:
Nirjhar Roy (IBM) 2026-02-20 12:23:59 +05:30 committed by Carlos Maiolino
parent 8baa9bccc0
commit ac1d977096
1 changed files with 3 additions and 0 deletions
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3
fs/xfs/libxfs/xfs_sb.c
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@ -1347,6 +1347,9 @@ xfs_log_sb(
* feature was introduced. This counter can go negative due to the way
* we handle nearly-lockless reservations, so we must use the _positive
* variant here to avoid writing out nonsense frextents.
*
* RT groups are only supported on v5 file systems, which always
* have lazy SB counters.
*/
if (xfs_has_rtgroups(mp) && !xfs_has_zoned(mp)) {
mp->m_sb.sb_frextents =