mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-27 04:47:05 +00:00
Code Issues Releases Wiki Activity

xfs: recompute growfsrtfree transaction reservation while growing rt volume

Browse source 
While playing with growfs to create a 20TB realtime section on a
filesystem that didn't previously have an rt section, I noticed that
growfs would occasionally shut down the log due to a transaction
reservation overflow.

xfs_calc_growrtfree_reservation uses the current size of the realtime
summary file (m_rsumsize) to compute the transaction reservation for a
growrtfree transaction.  The reservations are computed at mount time,
which means that m_rsumsize is zero when growfs starts "freeing" the new
realtime extents into the rt volume.  As a result, the transaction is
undersized and fails.

Fix this by recomputing the transaction reservations every time we
change m_rsumsize.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2023-12-11 10:41:51 -08:00
parent 18793e0505
commit 578bd4ce71
1 changed files with 5 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
fs/xfs/xfs_rtalloc.c
View file

@ -1038,6 +1038,9 @@ xfs_growfs_rt(
nrsumblocks = xfs_rtsummary_blockcount(mp, nrsumlevels,
nsbp->sb_rbmblocks);
nmp->m_rsumsize = nrsumsize = XFS_FSB_TO_B(mp, nrsumblocks);
/* recompute growfsrt reservation from new rsumsize */
xfs_trans_resv_calc(nmp, &nmp->m_resv);
/*
* Start a transaction, get the log reservation.
*/
@ -1124,6 +1127,8 @@ xfs_growfs_rt(
*/
mp->m_rsumlevels = nrsumlevels;
mp->m_rsumsize = nrsumsize;
/* recompute growfsrt reservation from new rsumsize */
xfs_trans_resv_calc(mp, &mp->m_resv);
error = xfs_trans_commit(tp);
if (error)