On Mon, Jun 05, 2017 at 02:54:33PM +0200, Carlos Maiolino wrote: > On Wed, May 24, 2017 at 01:06:41PM -0400, Brian Foster wrote: > > On Mon, May 22, 2017 at 05:32:18PM +0200, Carlos Maiolino wrote: > > > In order to fix a bug during buffer retries, a new flag type will be > > > added to xfs_log_item, and such operations need to be atomic. > > > > > > Change all operations in xfs_log_item flags to atomic operations > > > > > > To use atomic operations, xfs_log_item->li_flags also needed to be > > > converted to unsigned long type. > > > > > > There is a small whitespace cleanup in the patch too > > > > > > Signed-off-by: Carlos Maiolino <cmaiolino@xxxxxxxxxx> > > > --- > > > > As noted in the v1 discussion, I don't think this needs to be a > > dependency of the bug fix patch. Provided we can alleviate Dave's > > concerns over performance and not add any ->xa_lock acquisitions that > > aren't triggered by I/O errors, can we fix the bug using ->xa_lock and > > then port this on top? That way we have more of a backportable fix for > > older kernels affected by this problem. > > > > Hmm, I'm doing some tests with ->xa_lock, and I am actually deadlocking the > system when I try to acquire it in xfs_inode_item_push(), I wonder if ->xa_lock > is really correct to be used here, or maybe I'm doing something wrong? Still > checking what's going on though. > My bad actually, I didn't realize xa_lock was already acquired when re-submitting a failed buffer, at least for resubmission, it's already protected > > (Please see my comments on patches 2 and 3 wrt proposed changes to avoid > > the custom callback and need for atomic flags..) > > > > Brian > > > > > fs/xfs/xfs_bmap_item.c | 4 ++-- > > > fs/xfs/xfs_buf_item.c | 4 ++-- > > > fs/xfs/xfs_dquot.c | 2 +- > > > fs/xfs/xfs_extfree_item.c | 4 ++-- > > > fs/xfs/xfs_icache.c | 2 +- > > > fs/xfs/xfs_icreate_item.c | 2 +- > > > fs/xfs/xfs_inode.c | 4 ++-- > > > fs/xfs/xfs_inode_item.c | 2 +- > > > fs/xfs/xfs_qm.c | 2 +- > > > fs/xfs/xfs_refcount_item.c | 4 ++-- > > > fs/xfs/xfs_rmap_item.c | 4 ++-- > > > fs/xfs/xfs_trace.h | 4 ++-- > > > fs/xfs/xfs_trans.c | 4 ++-- > > > fs/xfs/xfs_trans.h | 2 +- > > > fs/xfs/xfs_trans_ail.c | 12 ++++++------ > > > fs/xfs/xfs_trans_buf.c | 2 +- > > > fs/xfs/xfs_trans_priv.h | 2 +- > > > 17 files changed, 30 insertions(+), 30 deletions(-) > > > > > > diff --git a/fs/xfs/xfs_bmap_item.c b/fs/xfs/xfs_bmap_item.c > > > index d419d23..9ebdca9 100644 > > > --- a/fs/xfs/xfs_bmap_item.c > > > +++ b/fs/xfs/xfs_bmap_item.c > > > @@ -141,7 +141,7 @@ STATIC void > > > xfs_bui_item_unlock( > > > struct xfs_log_item *lip) > > > { > > > - if (lip->li_flags & XFS_LI_ABORTED) > > > + if (test_bit(XFS_LI_ABORTED, &lip->li_flags)) > > > xfs_bui_item_free(BUI_ITEM(lip)); > > > } > > > > > > @@ -304,7 +304,7 @@ xfs_bud_item_unlock( > > > { > > > struct xfs_bud_log_item *budp = BUD_ITEM(lip); > > > > > > - if (lip->li_flags & XFS_LI_ABORTED) { > > > + if (test_bit(XFS_LI_ABORTED, &lip->li_flags)) { > > > xfs_bui_release(budp->bud_buip); > > > kmem_zone_free(xfs_bud_zone, budp); > > > } > > > diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c > > > index 0306168..6ac3816 100644 > > > --- a/fs/xfs/xfs_buf_item.c > > > +++ b/fs/xfs/xfs_buf_item.c > > > @@ -587,7 +587,7 @@ xfs_buf_item_unlock( > > > * (cancelled) buffers at unpin time, but we'll never go through the > > > * pin/unpin cycle if we abort inside commit. > > > */ > > > - aborted = (lip->li_flags & XFS_LI_ABORTED) ? true : false; > > > + aborted = (test_bit(XFS_LI_ABORTED, &lip->li_flags)) ? true : false; > > > /* > > > * Before possibly freeing the buf item, copy the per-transaction state > > > * so we can reference it safely later after clearing it from the > > > @@ -975,7 +975,7 @@ xfs_buf_item_relse( > > > xfs_buf_log_item_t *bip = bp->b_fspriv; > > > > > > trace_xfs_buf_item_relse(bp, _RET_IP_); > > > - ASSERT(!(bip->bli_item.li_flags & XFS_LI_IN_AIL)); > > > + ASSERT(!(test_bit(XFS_LI_IN_AIL, &bip->bli_item.li_flags))); > > > > > > bp->b_fspriv = bip->bli_item.li_bio_list; > > > if (bp->b_fspriv == NULL) > > > diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c > > > index 9d06cc3..e8f2cbc 100644 > > > --- a/fs/xfs/xfs_dquot.c > > > +++ b/fs/xfs/xfs_dquot.c > > > @@ -1003,7 +1003,7 @@ xfs_qm_dqflush_done( > > > * since it's cheaper, and then we recheck while > > > * holding the lock before removing the dquot from the AIL. > > > */ > > > - if ((lip->li_flags & XFS_LI_IN_AIL) && > > > + if (test_bit(XFS_LI_IN_AIL, &lip->li_flags) && > > > lip->li_lsn == qip->qli_flush_lsn) { > > > > > > /* xfs_trans_ail_delete() drops the AIL lock. */ > > > diff --git a/fs/xfs/xfs_extfree_item.c b/fs/xfs/xfs_extfree_item.c > > > index 44f8c54..32a519d 100644 > > > --- a/fs/xfs/xfs_extfree_item.c > > > +++ b/fs/xfs/xfs_extfree_item.c > > > @@ -150,7 +150,7 @@ STATIC void > > > xfs_efi_item_unlock( > > > struct xfs_log_item *lip) > > > { > > > - if (lip->li_flags & XFS_LI_ABORTED) > > > + if (test_bit(XFS_LI_ABORTED, &lip->li_flags)) > > > xfs_efi_item_free(EFI_ITEM(lip)); > > > } > > > > > > @@ -402,7 +402,7 @@ xfs_efd_item_unlock( > > > { > > > struct xfs_efd_log_item *efdp = EFD_ITEM(lip); > > > > > > - if (lip->li_flags & XFS_LI_ABORTED) { > > > + if (test_bit(XFS_LI_ABORTED, &lip->li_flags)) { > > > xfs_efi_release(efdp->efd_efip); > > > xfs_efd_item_free(efdp); > > > } > > > diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c > > > index f61c84f8..23d750f 100644 > > > --- a/fs/xfs/xfs_icache.c > > > +++ b/fs/xfs/xfs_icache.c > > > @@ -107,7 +107,7 @@ xfs_inode_free_callback( > > > xfs_idestroy_fork(ip, XFS_COW_FORK); > > > > > > if (ip->i_itemp) { > > > - ASSERT(!(ip->i_itemp->ili_item.li_flags & XFS_LI_IN_AIL)); > > > + ASSERT(!(test_bit(XFS_LI_IN_AIL, &ip->i_itemp->ili_item.li_flags))); > > > xfs_inode_item_destroy(ip); > > > ip->i_itemp = NULL; > > > } > > > diff --git a/fs/xfs/xfs_icreate_item.c b/fs/xfs/xfs_icreate_item.c > > > index 865ad13..e24cf83 100644 > > > --- a/fs/xfs/xfs_icreate_item.c > > > +++ b/fs/xfs/xfs_icreate_item.c > > > @@ -91,7 +91,7 @@ xfs_icreate_item_unlock( > > > { > > > struct xfs_icreate_item *icp = ICR_ITEM(lip); > > > > > > - if (icp->ic_item.li_flags & XFS_LI_ABORTED) > > > + if (test_bit(XFS_LI_ABORTED, &icp->ic_item.li_flags)) > > > kmem_zone_free(xfs_icreate_zone, icp); > > > return; > > > } > > > diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c > > > index ec9826c..208c8c7 100644 > > > --- a/fs/xfs/xfs_inode.c > > > +++ b/fs/xfs/xfs_inode.c > > > @@ -504,7 +504,7 @@ xfs_lock_inodes( > > > if (!try_lock) { > > > for (j = (i - 1); j >= 0 && !try_lock; j--) { > > > lp = (xfs_log_item_t *)ips[j]->i_itemp; > > > - if (lp && (lp->li_flags & XFS_LI_IN_AIL)) > > > + if (lp && test_bit(XFS_LI_IN_AIL, &lp->li_flags)) > > > try_lock++; > > > } > > > } > > > @@ -601,7 +601,7 @@ xfs_lock_two_inodes( > > > * and try again. > > > */ > > > lp = (xfs_log_item_t *)ip0->i_itemp; > > > - if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { > > > + if (lp && test_bit(XFS_LI_IN_AIL, &lp->li_flags)) { > > > if (!xfs_ilock_nowait(ip1, xfs_lock_inumorder(lock_mode, 1))) { > > > xfs_iunlock(ip0, lock_mode); > > > if ((++attempts % 5) == 0) > > > diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c > > > index 08cb7d1..eeeadbb 100644 > > > --- a/fs/xfs/xfs_inode_item.c > > > +++ b/fs/xfs/xfs_inode_item.c > > > @@ -783,7 +783,7 @@ xfs_iflush_abort( > > > xfs_inode_log_item_t *iip = ip->i_itemp; > > > > > > if (iip) { > > > - if (iip->ili_item.li_flags & XFS_LI_IN_AIL) { > > > + if (test_bit(XFS_LI_IN_AIL, &iip->ili_item.li_flags)) { > > > xfs_trans_ail_remove(&iip->ili_item, > > > stale ? SHUTDOWN_LOG_IO_ERROR : > > > SHUTDOWN_CORRUPT_INCORE); > > > diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c > > > index 5fe6e70..da58263 100644 > > > --- a/fs/xfs/xfs_qm.c > > > +++ b/fs/xfs/xfs_qm.c > > > @@ -169,7 +169,7 @@ xfs_qm_dqpurge( > > > > > > ASSERT(atomic_read(&dqp->q_pincount) == 0); > > > ASSERT(XFS_FORCED_SHUTDOWN(mp) || > > > - !(dqp->q_logitem.qli_item.li_flags & XFS_LI_IN_AIL)); > > > + !(test_bit(XFS_LI_IN_AIL, &dqp->q_logitem.qli_item.li_flags))); > > > > > > xfs_dqfunlock(dqp); > > > xfs_dqunlock(dqp); > > > diff --git a/fs/xfs/xfs_refcount_item.c b/fs/xfs/xfs_refcount_item.c > > > index 96fe209..5ecfd04 100644 > > > --- a/fs/xfs/xfs_refcount_item.c > > > +++ b/fs/xfs/xfs_refcount_item.c > > > @@ -139,7 +139,7 @@ STATIC void > > > xfs_cui_item_unlock( > > > struct xfs_log_item *lip) > > > { > > > - if (lip->li_flags & XFS_LI_ABORTED) > > > + if (test_bit(XFS_LI_ABORTED, &lip->li_flags)) > > > xfs_cui_item_free(CUI_ITEM(lip)); > > > } > > > > > > @@ -308,7 +308,7 @@ xfs_cud_item_unlock( > > > { > > > struct xfs_cud_log_item *cudp = CUD_ITEM(lip); > > > > > > - if (lip->li_flags & XFS_LI_ABORTED) { > > > + if (test_bit(XFS_LI_ABORTED, &lip->li_flags)) { > > > xfs_cui_release(cudp->cud_cuip); > > > kmem_zone_free(xfs_cud_zone, cudp); > > > } > > > diff --git a/fs/xfs/xfs_rmap_item.c b/fs/xfs/xfs_rmap_item.c > > > index f3b139c..ada5ec7 100644 > > > --- a/fs/xfs/xfs_rmap_item.c > > > +++ b/fs/xfs/xfs_rmap_item.c > > > @@ -139,7 +139,7 @@ STATIC void > > > xfs_rui_item_unlock( > > > struct xfs_log_item *lip) > > > { > > > - if (lip->li_flags & XFS_LI_ABORTED) > > > + if (test_bit(XFS_LI_ABORTED, &lip->li_flags)) > > > xfs_rui_item_free(RUI_ITEM(lip)); > > > } > > > > > > @@ -330,7 +330,7 @@ xfs_rud_item_unlock( > > > { > > > struct xfs_rud_log_item *rudp = RUD_ITEM(lip); > > > > > > - if (lip->li_flags & XFS_LI_ABORTED) { > > > + if (test_bit(XFS_LI_ABORTED, &lip->li_flags)) { > > > xfs_rui_release(rudp->rud_ruip); > > > kmem_zone_free(xfs_rud_zone, rudp); > > > } > > > diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h > > > index 7c5a165..d09e539 100644 > > > --- a/fs/xfs/xfs_trace.h > > > +++ b/fs/xfs/xfs_trace.h > > > @@ -1031,7 +1031,7 @@ DECLARE_EVENT_CLASS(xfs_log_item_class, > > > __field(dev_t, dev) > > > __field(void *, lip) > > > __field(uint, type) > > > - __field(uint, flags) > > > + __field(unsigned long, flags) > > > __field(xfs_lsn_t, lsn) > > > ), > > > TP_fast_assign( > > > @@ -1083,7 +1083,7 @@ DECLARE_EVENT_CLASS(xfs_ail_class, > > > __field(dev_t, dev) > > > __field(void *, lip) > > > __field(uint, type) > > > - __field(uint, flags) > > > + __field(unsigned long, flags) > > > __field(xfs_lsn_t, old_lsn) > > > __field(xfs_lsn_t, new_lsn) > > > ), > > > diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c > > > index be86e4e..6c8f492 100644 > > > --- a/fs/xfs/xfs_trans.c > > > +++ b/fs/xfs/xfs_trans.c > > > @@ -764,7 +764,7 @@ xfs_trans_free_items( > > > if (commit_lsn != NULLCOMMITLSN) > > > lip->li_ops->iop_committing(lip, commit_lsn); > > > if (abort) > > > - lip->li_flags |= XFS_LI_ABORTED; > > > + set_bit(XFS_LI_ABORTED, &lip->li_flags); > > > lip->li_ops->iop_unlock(lip); > > > > > > xfs_trans_free_item_desc(lidp); > > > @@ -835,7 +835,7 @@ xfs_trans_committed_bulk( > > > xfs_lsn_t item_lsn; > > > > > > if (aborted) > > > - lip->li_flags |= XFS_LI_ABORTED; > > > + set_bit(XFS_LI_ABORTED, &lip->li_flags); > > > item_lsn = lip->li_ops->iop_committed(lip, commit_lsn); > > > > > > /* item_lsn of -1 means the item needs no further processing */ > > > diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h > > > index a07acbf..7ae04de 100644 > > > --- a/fs/xfs/xfs_trans.h > > > +++ b/fs/xfs/xfs_trans.h > > > @@ -48,7 +48,7 @@ typedef struct xfs_log_item { > > > struct xfs_mount *li_mountp; /* ptr to fs mount */ > > > struct xfs_ail *li_ailp; /* ptr to AIL */ > > > uint li_type; /* item type */ > > > - uint li_flags; /* misc flags */ > > > + unsigned long li_flags; /* misc flags */ > > > struct xfs_log_item *li_bio_list; /* buffer item list */ > > > void (*li_cb)(struct xfs_buf *, > > > struct xfs_log_item *); > > > diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c > > > index 9056c0f..76e0de7 100644 > > > --- a/fs/xfs/xfs_trans_ail.c > > > +++ b/fs/xfs/xfs_trans_ail.c > > > @@ -45,7 +45,7 @@ xfs_ail_check( > > > /* > > > * Check the next and previous entries are valid. > > > */ > > > - ASSERT((lip->li_flags & XFS_LI_IN_AIL) != 0); > > > + ASSERT(test_bit(XFS_LI_IN_AIL, &lip->li_flags)); > > > prev_lip = list_entry(lip->li_ail.prev, xfs_log_item_t, li_ail); > > > if (&prev_lip->li_ail != &ailp->xa_ail) > > > ASSERT(XFS_LSN_CMP(prev_lip->li_lsn, lip->li_lsn) <= 0); > > > @@ -653,7 +653,7 @@ xfs_trans_ail_update_bulk( > > > > > > for (i = 0; i < nr_items; i++) { > > > struct xfs_log_item *lip = log_items[i]; > > > - if (lip->li_flags & XFS_LI_IN_AIL) { > > > + if (test_bit(XFS_LI_IN_AIL, &lip->li_flags)) { > > > /* check if we really need to move the item */ > > > if (XFS_LSN_CMP(lsn, lip->li_lsn) <= 0) > > > continue; > > > @@ -663,7 +663,7 @@ xfs_trans_ail_update_bulk( > > > if (mlip == lip) > > > mlip_changed = 1; > > > } else { > > > - lip->li_flags |= XFS_LI_IN_AIL; > > > + set_bit(XFS_LI_IN_AIL, &lip->li_flags); > > > trace_xfs_ail_insert(lip, 0, lsn); > > > } > > > lip->li_lsn = lsn; > > > @@ -687,13 +687,13 @@ xfs_trans_ail_update_bulk( > > > bool > > > xfs_ail_delete_one( > > > struct xfs_ail *ailp, > > > - struct xfs_log_item *lip) > > > + struct xfs_log_item *lip) > > > { > > > struct xfs_log_item *mlip = xfs_ail_min(ailp); > > > > > > trace_xfs_ail_delete(lip, mlip->li_lsn, lip->li_lsn); > > > xfs_ail_delete(ailp, lip); > > > - lip->li_flags &= ~XFS_LI_IN_AIL; > > > + clear_bit(XFS_LI_IN_AIL, &lip->li_flags); > > > lip->li_lsn = 0; > > > > > > return mlip == lip; > > > @@ -729,7 +729,7 @@ xfs_trans_ail_delete( > > > struct xfs_mount *mp = ailp->xa_mount; > > > bool mlip_changed; > > > > > > - if (!(lip->li_flags & XFS_LI_IN_AIL)) { > > > + if (!(test_bit(XFS_LI_IN_AIL, &lip->li_flags))) { > > > spin_unlock(&ailp->xa_lock); > > > if (!XFS_FORCED_SHUTDOWN(mp)) { > > > xfs_alert_tag(mp, XFS_PTAG_AILDELETE, > > > diff --git a/fs/xfs/xfs_trans_buf.c b/fs/xfs/xfs_trans_buf.c > > > index 8ee29ca..15814b5 100644 > > > --- a/fs/xfs/xfs_trans_buf.c > > > +++ b/fs/xfs/xfs_trans_buf.c > > > @@ -433,7 +433,7 @@ xfs_trans_brelse(xfs_trans_t *tp, > > > ASSERT(bp->b_pincount == 0); > > > ***/ > > > ASSERT(atomic_read(&bip->bli_refcount) == 0); > > > - ASSERT(!(bip->bli_item.li_flags & XFS_LI_IN_AIL)); > > > + ASSERT(!(test_bit(XFS_LI_IN_AIL, &bip->bli_item.li_flags))); > > > ASSERT(!(bip->bli_flags & XFS_BLI_INODE_ALLOC_BUF)); > > > xfs_buf_item_relse(bp); > > > } > > > diff --git a/fs/xfs/xfs_trans_priv.h b/fs/xfs/xfs_trans_priv.h > > > index d91706c..82ea000 100644 > > > --- a/fs/xfs/xfs_trans_priv.h > > > +++ b/fs/xfs/xfs_trans_priv.h > > > @@ -119,7 +119,7 @@ xfs_trans_ail_remove( > > > > > > spin_lock(&ailp->xa_lock); > > > /* xfs_trans_ail_delete() drops the AIL lock */ > > > - if (lip->li_flags & XFS_LI_IN_AIL) > > > + if (test_bit(XFS_LI_IN_AIL, &lip->li_flags)) > > > xfs_trans_ail_delete(ailp, lip, shutdown_type); > > > else > > > spin_unlock(&ailp->xa_lock); > > > -- > > > 2.9.3 > > > > > > -- > > > To unsubscribe from this list: send the line "unsubscribe linux-xfs" in > > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- > Carlos > -- > To unsubscribe from this list: send the line "unsubscribe linux-xfs" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Carlos -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html