| Message ID | 20230118224505.1964941-5-david@fromorbit.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | xfs: per-ag centric allocation alogrithms | expand |
On Thu, 2023-01-19 at 09:44 +1100, Dave Chinner wrote: > From: Dave Chinner <dchinner@redhat.com> > > Now that xfs_alloc_vextent() does all the AGF deadlock prevention > filtering for multiple allocations in a single transaction, we no > longer need the allocation setup code to care about what AGs we > might already have locked. > > Hence we can remove all the "nullfb" conditional logic in places > like xfs_bmap_btalloc() and instead have them focus simply on > setting up locality constraints. If the allocation fails due to > AGF lock filtering in xfs_alloc_vextent, then we just fall back as > we normally do to more relaxed allocation constraints. > > As a result, any allocation that allows AG scanning (i.e. not > confined to a single AG) and does not force a worst case full > filesystem scan will now be able to attempt allocation from AGs > lower than that defined by tp->t_firstblock. This is because > xfs_alloc_vextent() allows try-locking of the AGFs and hence enables > low space algorithms to at least -try- to get space from AGs lower > than the one that we have currently locked and allocated from. This > is a significant improvement in the low space allocation algorithm. > > Signed-off-by: Dave Chinner <dchinner@redhat.com> > --- > fs/xfs/libxfs/xfs_bmap.c | 168 +++++++++++-------------------- > -- > fs/xfs/libxfs/xfs_bmap.h | 1 + > fs/xfs/libxfs/xfs_bmap_btree.c | 30 +++--- > 3 files changed, 67 insertions(+), 132 deletions(-) > > diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c > index 9dc33cdc2ab9..bc566aae4246 100644 > --- a/fs/xfs/libxfs/xfs_bmap.c > +++ b/fs/xfs/libxfs/xfs_bmap.c > @@ -645,16 +645,9 @@ xfs_bmap_extents_to_btree( > args.tp = tp; > args.mp = mp; > xfs_rmap_ino_bmbt_owner(&args.oinfo, ip->i_ino, whichfork); > - if (tp->t_firstblock == NULLFSBLOCK) { > - args.type = XFS_ALLOCTYPE_START_BNO; > - args.fsbno = XFS_INO_TO_FSB(mp, ip->i_ino); > - } else if (tp->t_flags & XFS_TRANS_LOWMODE) { > - args.type = XFS_ALLOCTYPE_START_BNO; > - args.fsbno = tp->t_firstblock; > - } else { > - args.type = XFS_ALLOCTYPE_NEAR_BNO; > - args.fsbno = tp->t_firstblock; > - } > + > + args.type = XFS_ALLOCTYPE_START_BNO; > + args.fsbno = XFS_INO_TO_FSB(mp, ip->i_ino); > args.minlen = args.maxlen = args.prod = 1; > args.wasdel = wasdel; > *logflagsp = 0; > @@ -662,17 +655,14 @@ xfs_bmap_extents_to_btree( > if (error) > goto out_root_realloc; > > + /* > + * Allocation can't fail, the space was reserved. > + */ > if (WARN_ON_ONCE(args.fsbno == NULLFSBLOCK)) { > error = -ENOSPC; > goto out_root_realloc; > } > > - /* > - * Allocation can't fail, the space was reserved. > - */ > - ASSERT(tp->t_firstblock == NULLFSBLOCK || > - args.agno >= XFS_FSB_TO_AGNO(mp, tp->t_firstblock)); > - tp->t_firstblock = args.fsbno; > cur->bc_ino.allocated++; > ip->i_nblocks++; > xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, 1L); > @@ -804,13 +794,8 @@ xfs_bmap_local_to_extents( > * Allocate a block. We know we need only one, since the > * file currently fits in an inode. > */ > - if (tp->t_firstblock == NULLFSBLOCK) { > - args.fsbno = XFS_INO_TO_FSB(args.mp, ip->i_ino); > - args.type = XFS_ALLOCTYPE_START_BNO; > - } else { > - args.fsbno = tp->t_firstblock; > - args.type = XFS_ALLOCTYPE_NEAR_BNO; > - } > + args.fsbno = XFS_INO_TO_FSB(args.mp, ip->i_ino); > + args.type = XFS_ALLOCTYPE_START_BNO; > args.total = total; > args.minlen = args.maxlen = args.prod = 1; > error = xfs_alloc_vextent(&args); > @@ -820,7 +805,6 @@ xfs_bmap_local_to_extents( > /* Can't fail, the space was reserved. */ > ASSERT(args.fsbno != NULLFSBLOCK); > ASSERT(args.len == 1); > - tp->t_firstblock = args.fsbno; > error = xfs_trans_get_buf(tp, args.mp->m_ddev_targp, > XFS_FSB_TO_DADDR(args.mp, args.fsbno), > args.mp->m_bsize, 0, &bp); > @@ -854,8 +838,7 @@ xfs_bmap_local_to_extents( > > ifp->if_nextents = 1; > ip->i_nblocks = 1; > - xfs_trans_mod_dquot_byino(tp, ip, > - XFS_TRANS_DQ_BCOUNT, 1L); > + xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, 1L); > flags |= xfs_ilog_fext(whichfork); > > done: > @@ -3025,9 +3008,7 @@ xfs_bmap_adjacent( > struct xfs_bmalloca *ap) /* bmap alloc argument struct > */ > { > xfs_fsblock_t adjust; /* adjustment to block > numbers */ > - xfs_agnumber_t fb_agno; /* ag number of ap- > >firstblock */ > xfs_mount_t *mp; /* mount point structure */ > - int nullfb; /* true if ap->firstblock > isn't set */ > int rt; /* true if inode is realtime > */ > > #define ISVALID(x,y) \ > @@ -3038,11 +3019,8 @@ xfs_bmap_adjacent( > XFS_FSB_TO_AGBNO(mp, x) < mp->m_sb.sb_agblocks) > > mp = ap->ip->i_mount; > - nullfb = ap->tp->t_firstblock == NULLFSBLOCK; > rt = XFS_IS_REALTIME_INODE(ap->ip) && > (ap->datatype & XFS_ALLOC_USERDATA); > - fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, > - ap->tp- > >t_firstblock); > /* > * If allocating at eof, and there's a previous real block, > * try to use its last block as our starting point. > @@ -3101,13 +3079,6 @@ xfs_bmap_adjacent( > prevbno += adjust; > else > prevdiff += adjust; > - /* > - * If the firstblock forbids it, can't use > it, > - * must use default. > - */ > - if (!rt && !nullfb && > - XFS_FSB_TO_AGNO(mp, prevbno) != fb_agno) > - prevbno = NULLFSBLOCK; > } > /* > * No previous block or can't follow it, just > default. > @@ -3143,13 +3114,6 @@ xfs_bmap_adjacent( > gotdiff += adjust - ap->length; > } else > gotdiff += adjust; > - /* > - * If the firstblock forbids it, can't use > it, > - * must use default. > - */ > - if (!rt && !nullfb && > - XFS_FSB_TO_AGNO(mp, gotbno) != fb_agno) > - gotbno = NULLFSBLOCK; > } > /* > * No next block, just default. > @@ -3236,7 +3200,7 @@ xfs_bmap_select_minlen( > } > > STATIC int > -xfs_bmap_btalloc_nullfb( > +xfs_bmap_btalloc_select_lengths( > struct xfs_bmalloca *ap, > struct xfs_alloc_arg *args, > xfs_extlen_t *blen) > @@ -3247,8 +3211,13 @@ xfs_bmap_btalloc_nullfb( > int error; > > args->type = XFS_ALLOCTYPE_START_BNO; > - args->total = ap->total; > + if (ap->tp->t_flags & XFS_TRANS_LOWMODE) { > + args->total = ap->minlen; > + args->minlen = ap->minlen; > + return 0; > + } > > + args->total = ap->total; > startag = ag = XFS_FSB_TO_AGNO(mp, args->fsbno); > if (startag == NULLAGNUMBER) > startag = ag = 0; > @@ -3280,6 +3249,13 @@ xfs_bmap_btalloc_filestreams( > int notinit = 0; > int error; > > + if (ap->tp->t_flags & XFS_TRANS_LOWMODE) { > + args->type = XFS_ALLOCTYPE_FIRST_AG; > + args->total = ap->minlen; > + args->minlen = ap->minlen; > + return 0; > + } > + > args->type = XFS_ALLOCTYPE_NEAR_BNO; > args->total = ap->total; > > @@ -3460,19 +3436,15 @@ xfs_bmap_exact_minlen_extent_alloc( > > xfs_bmap_compute_alignments(ap, &args); > > - if (ap->tp->t_firstblock == NULLFSBLOCK) { > - /* > - * Unlike the longest extent available in an AG, we > don't track > - * the length of an AG's shortest extent. > - * XFS_ERRTAG_BMAP_ALLOC_MINLEN_EXTENT is a debug > only knob and > - * hence we can afford to start traversing from the > 0th AG since > - * we need not be concerned about a drop in > performance in > - * "debug only" code paths. > - */ > - ap->blkno = XFS_AGB_TO_FSB(mp, 0, 0); > - } else { > - ap->blkno = ap->tp->t_firstblock; > - } > + /* > + * Unlike the longest extent available in an AG, we don't > track > + * the length of an AG's shortest extent. > + * XFS_ERRTAG_BMAP_ALLOC_MINLEN_EXTENT is a debug only knob > and > + * hence we can afford to start traversing from the 0th AG > since > + * we need not be concerned about a drop in performance in > + * "debug only" code paths. > + */ > + ap->blkno = XFS_AGB_TO_FSB(mp, 0, 0); > > args.fsbno = ap->blkno; > args.oinfo = XFS_RMAP_OINFO_SKIP_UPDATE; > @@ -3515,13 +3487,11 @@ xfs_bmap_btalloc( > struct xfs_mount *mp = ap->ip->i_mount; > struct xfs_alloc_arg args = { .tp = ap->tp, .mp = mp }; > xfs_alloctype_t atype = 0; > - xfs_agnumber_t fb_agno; /* ag number of ap- > >firstblock */ > xfs_agnumber_t ag; > xfs_fileoff_t orig_offset; > xfs_extlen_t orig_length; > xfs_extlen_t blen; > xfs_extlen_t nextminlen = 0; > - int nullfb; /* true if ap->firstblock > isn't set */ > int isaligned; > int tryagain; > int error; > @@ -3533,34 +3503,17 @@ xfs_bmap_btalloc( > > stripe_align = xfs_bmap_compute_alignments(ap, &args); > > - nullfb = ap->tp->t_firstblock == NULLFSBLOCK; > - fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, > - ap->tp- > >t_firstblock); > - if (nullfb) { > - if ((ap->datatype & XFS_ALLOC_USERDATA) && > - xfs_inode_is_filestream(ap->ip)) { > - ag = xfs_filestream_lookup_ag(ap->ip); > - ag = (ag != NULLAGNUMBER) ? ag : 0; > - ap->blkno = XFS_AGB_TO_FSB(mp, ag, 0); > - } else { > - ap->blkno = XFS_INO_TO_FSB(mp, ap->ip- > >i_ino); > - } > - } else > - ap->blkno = ap->tp->t_firstblock; > + if ((ap->datatype & XFS_ALLOC_USERDATA) && > + xfs_inode_is_filestream(ap->ip)) { > + ag = xfs_filestream_lookup_ag(ap->ip); > + ag = (ag != NULLAGNUMBER) ? ag : 0; > + ap->blkno = XFS_AGB_TO_FSB(mp, ag, 0); > + } else { > + ap->blkno = XFS_INO_TO_FSB(mp, ap->ip->i_ino); > + } > > xfs_bmap_adjacent(ap); > > - /* > - * If allowed, use ap->blkno; otherwise must use firstblock > since > - * it's in the right allocation group. > - */ > - if (nullfb || XFS_FSB_TO_AGNO(mp, ap->blkno) == fb_agno) > - ; > - else > - ap->blkno = ap->tp->t_firstblock; > - /* > - * Normal allocation, done through xfs_alloc_vextent. > - */ > tryagain = isaligned = 0; > args.fsbno = ap->blkno; > args.oinfo = XFS_RMAP_OINFO_SKIP_UPDATE; > @@ -3568,30 +3521,19 @@ xfs_bmap_btalloc( > /* Trim the allocation back to the maximum an AG can fit. */ > args.maxlen = min(ap->length, mp->m_ag_max_usable); > blen = 0; > - if (nullfb) { > - /* > - * Search for an allocation group with a single > extent large > - * enough for the request. If one isn't found, then > adjust > - * the minimum allocation size to the largest space > found. > - */ > - if ((ap->datatype & XFS_ALLOC_USERDATA) && > - xfs_inode_is_filestream(ap->ip)) > - error = xfs_bmap_btalloc_filestreams(ap, > &args, &blen); > - else > - error = xfs_bmap_btalloc_nullfb(ap, &args, > &blen); > - if (error) > - return error; > - } else if (ap->tp->t_flags & XFS_TRANS_LOWMODE) { > - if (xfs_inode_is_filestream(ap->ip)) > - args.type = XFS_ALLOCTYPE_FIRST_AG; > - else > - args.type = XFS_ALLOCTYPE_START_BNO; > - args.total = args.minlen = ap->minlen; > - } else { > - args.type = XFS_ALLOCTYPE_NEAR_BNO; > - args.total = ap->total; > - args.minlen = ap->minlen; > - } > + > + /* > + * Search for an allocation group with a single extent large > + * enough for the request. If one isn't found, then adjust > + * the minimum allocation size to the largest space found. > + */ > + if ((ap->datatype & XFS_ALLOC_USERDATA) && > + xfs_inode_is_filestream(ap->ip)) > + error = xfs_bmap_btalloc_filestreams(ap, &args, > &blen); > + else > + error = xfs_bmap_btalloc_select_lengths(ap, &args, > &blen); > + if (error) > + return error; > > /* > * If we are not low on available data blocks, and the > underlying > @@ -3678,7 +3620,7 @@ xfs_bmap_btalloc( > if ((error = xfs_alloc_vextent(&args))) > return error; > } > - if (args.fsbno == NULLFSBLOCK && nullfb && > + if (args.fsbno == NULLFSBLOCK && > args.minlen > ap->minlen) { > args.minlen = ap->minlen; > args.type = XFS_ALLOCTYPE_START_BNO; > @@ -3686,7 +3628,7 @@ xfs_bmap_btalloc( > if ((error = xfs_alloc_vextent(&args))) > return error; > } > - if (args.fsbno == NULLFSBLOCK && nullfb) { > + if (args.fsbno == NULLFSBLOCK) { > args.fsbno = 0; > args.type = XFS_ALLOCTYPE_FIRST_AG; > args.total = ap->minlen; > diff --git a/fs/xfs/libxfs/xfs_bmap.h b/fs/xfs/libxfs/xfs_bmap.h > index 08c16e4edc0f..0ffc0d998850 100644 > --- a/fs/xfs/libxfs/xfs_bmap.h > +++ b/fs/xfs/libxfs/xfs_bmap.h > @@ -269,4 +269,5 @@ extern struct > kmem_cache *xfs_bmap_intent_cache; > int __init xfs_bmap_intent_init_cache(void); > void xfs_bmap_intent_destroy_cache(void); > > + Stray new line? Otherwise looks like a nice clean up Reviewed-by: Allison Henderson <allison.henderson@oracle.com> > #endif /* __XFS_BMAP_H__ */ > diff --git a/fs/xfs/libxfs/xfs_bmap_btree.c > b/fs/xfs/libxfs/xfs_bmap_btree.c > index 18de4fbfef4e..76a0f0d260a4 100644 > --- a/fs/xfs/libxfs/xfs_bmap_btree.c > +++ b/fs/xfs/libxfs/xfs_bmap_btree.c > @@ -206,28 +206,21 @@ xfs_bmbt_alloc_block( > memset(&args, 0, sizeof(args)); > args.tp = cur->bc_tp; > args.mp = cur->bc_mp; > - args.fsbno = cur->bc_tp->t_firstblock; > xfs_rmap_ino_bmbt_owner(&args.oinfo, cur->bc_ino.ip->i_ino, > cur->bc_ino.whichfork); > > - if (args.fsbno == NULLFSBLOCK) { > - args.fsbno = be64_to_cpu(start->l); > - args.type = XFS_ALLOCTYPE_START_BNO; > + args.fsbno = be64_to_cpu(start->l); > + args.type = XFS_ALLOCTYPE_START_BNO; > > - /* > - * If we are coming here from something like > unwritten extent > - * conversion, there has been no data extent > allocation already > - * done, so we have to ensure that we attempt to > locate the > - * entire set of bmbt allocations in the same AG, as > - * xfs_bmapi_write() would have reserved. > - */ > + /* > + * If we are coming here from something like unwritten extent > + * conversion, there has been no data extent allocation > already done, so > + * we have to ensure that we attempt to locate the entire set > of bmbt > + * allocations in the same AG, as xfs_bmapi_write() would > have reserved. > + */ > + if (cur->bc_tp->t_firstblock == NULLFSBLOCK) > args.minleft = xfs_bmapi_minleft(cur->bc_tp, cur- > >bc_ino.ip, > - cur- > >bc_ino.whichfork); > - } else if (cur->bc_tp->t_flags & XFS_TRANS_LOWMODE) { > - args.type = XFS_ALLOCTYPE_START_BNO; > - } else { > - args.type = XFS_ALLOCTYPE_NEAR_BNO; > - } > + cur->bc_ino.whichfork); > > args.minlen = args.maxlen = args.prod = 1; > args.wasdel = cur->bc_ino.flags & XFS_BTCUR_BMBT_WASDEL; > @@ -247,7 +240,7 @@ xfs_bmbt_alloc_block( > */ > args.fsbno = 0; > args.minleft = 0; > - args.type = XFS_ALLOCTYPE_FIRST_AG; > + args.type = XFS_ALLOCTYPE_START_BNO; > error = xfs_alloc_vextent(&args); > if (error) > goto error0; > @@ -259,7 +252,6 @@ xfs_bmbt_alloc_block( > } > > ASSERT(args.len == 1); > - cur->bc_tp->t_firstblock = args.fsbno; > cur->bc_ino.allocated++; > cur->bc_ino.ip->i_nblocks++; > xfs_trans_log_inode(args.tp, cur->bc_ino.ip, XFS_ILOG_CORE);
diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index 9dc33cdc2ab9..bc566aae4246 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -645,16 +645,9 @@ xfs_bmap_extents_to_btree( args.tp = tp; args.mp = mp; xfs_rmap_ino_bmbt_owner(&args.oinfo, ip->i_ino, whichfork); - if (tp->t_firstblock == NULLFSBLOCK) { - args.type = XFS_ALLOCTYPE_START_BNO; - args.fsbno = XFS_INO_TO_FSB(mp, ip->i_ino); - } else if (tp->t_flags & XFS_TRANS_LOWMODE) { - args.type = XFS_ALLOCTYPE_START_BNO; - args.fsbno = tp->t_firstblock; - } else { - args.type = XFS_ALLOCTYPE_NEAR_BNO; - args.fsbno = tp->t_firstblock; - } + + args.type = XFS_ALLOCTYPE_START_BNO; + args.fsbno = XFS_INO_TO_FSB(mp, ip->i_ino); args.minlen = args.maxlen = args.prod = 1; args.wasdel = wasdel; *logflagsp = 0; @@ -662,17 +655,14 @@ xfs_bmap_extents_to_btree( if (error) goto out_root_realloc; + /* + * Allocation can't fail, the space was reserved. + */ if (WARN_ON_ONCE(args.fsbno == NULLFSBLOCK)) { error = -ENOSPC; goto out_root_realloc; } - /* - * Allocation can't fail, the space was reserved. - */ - ASSERT(tp->t_firstblock == NULLFSBLOCK || - args.agno >= XFS_FSB_TO_AGNO(mp, tp->t_firstblock)); - tp->t_firstblock = args.fsbno; cur->bc_ino.allocated++; ip->i_nblocks++; xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, 1L); @@ -804,13 +794,8 @@ xfs_bmap_local_to_extents( * Allocate a block. We know we need only one, since the * file currently fits in an inode. */ - if (tp->t_firstblock == NULLFSBLOCK) { - args.fsbno = XFS_INO_TO_FSB(args.mp, ip->i_ino); - args.type = XFS_ALLOCTYPE_START_BNO; - } else { - args.fsbno = tp->t_firstblock; - args.type = XFS_ALLOCTYPE_NEAR_BNO; - } + args.fsbno = XFS_INO_TO_FSB(args.mp, ip->i_ino); + args.type = XFS_ALLOCTYPE_START_BNO; args.total = total; args.minlen = args.maxlen = args.prod = 1; error = xfs_alloc_vextent(&args); @@ -820,7 +805,6 @@ xfs_bmap_local_to_extents( /* Can't fail, the space was reserved. */ ASSERT(args.fsbno != NULLFSBLOCK); ASSERT(args.len == 1); - tp->t_firstblock = args.fsbno; error = xfs_trans_get_buf(tp, args.mp->m_ddev_targp, XFS_FSB_TO_DADDR(args.mp, args.fsbno), args.mp->m_bsize, 0, &bp); @@ -854,8 +838,7 @@ xfs_bmap_local_to_extents( ifp->if_nextents = 1; ip->i_nblocks = 1; - xfs_trans_mod_dquot_byino(tp, ip, - XFS_TRANS_DQ_BCOUNT, 1L); + xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, 1L); flags |= xfs_ilog_fext(whichfork); done: @@ -3025,9 +3008,7 @@ xfs_bmap_adjacent( struct xfs_bmalloca *ap) /* bmap alloc argument struct */ { xfs_fsblock_t adjust; /* adjustment to block numbers */ - xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ xfs_mount_t *mp; /* mount point structure */ - int nullfb; /* true if ap->firstblock isn't set */ int rt; /* true if inode is realtime */ #define ISVALID(x,y) \ @@ -3038,11 +3019,8 @@ xfs_bmap_adjacent( XFS_FSB_TO_AGBNO(mp, x) < mp->m_sb.sb_agblocks) mp = ap->ip->i_mount; - nullfb = ap->tp->t_firstblock == NULLFSBLOCK; rt = XFS_IS_REALTIME_INODE(ap->ip) && (ap->datatype & XFS_ALLOC_USERDATA); - fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, - ap->tp->t_firstblock); /* * If allocating at eof, and there's a previous real block, * try to use its last block as our starting point. @@ -3101,13 +3079,6 @@ xfs_bmap_adjacent( prevbno += adjust; else prevdiff += adjust; - /* - * If the firstblock forbids it, can't use it, - * must use default. - */ - if (!rt && !nullfb && - XFS_FSB_TO_AGNO(mp, prevbno) != fb_agno) - prevbno = NULLFSBLOCK; } /* * No previous block or can't follow it, just default. @@ -3143,13 +3114,6 @@ xfs_bmap_adjacent( gotdiff += adjust - ap->length; } else gotdiff += adjust; - /* - * If the firstblock forbids it, can't use it, - * must use default. - */ - if (!rt && !nullfb && - XFS_FSB_TO_AGNO(mp, gotbno) != fb_agno) - gotbno = NULLFSBLOCK; } /* * No next block, just default. @@ -3236,7 +3200,7 @@ xfs_bmap_select_minlen( } STATIC int -xfs_bmap_btalloc_nullfb( +xfs_bmap_btalloc_select_lengths( struct xfs_bmalloca *ap, struct xfs_alloc_arg *args, xfs_extlen_t *blen) @@ -3247,8 +3211,13 @@ xfs_bmap_btalloc_nullfb( int error; args->type = XFS_ALLOCTYPE_START_BNO; - args->total = ap->total; + if (ap->tp->t_flags & XFS_TRANS_LOWMODE) { + args->total = ap->minlen; + args->minlen = ap->minlen; + return 0; + } + args->total = ap->total; startag = ag = XFS_FSB_TO_AGNO(mp, args->fsbno); if (startag == NULLAGNUMBER) startag = ag = 0; @@ -3280,6 +3249,13 @@ xfs_bmap_btalloc_filestreams( int notinit = 0; int error; + if (ap->tp->t_flags & XFS_TRANS_LOWMODE) { + args->type = XFS_ALLOCTYPE_FIRST_AG; + args->total = ap->minlen; + args->minlen = ap->minlen; + return 0; + } + args->type = XFS_ALLOCTYPE_NEAR_BNO; args->total = ap->total; @@ -3460,19 +3436,15 @@ xfs_bmap_exact_minlen_extent_alloc( xfs_bmap_compute_alignments(ap, &args); - if (ap->tp->t_firstblock == NULLFSBLOCK) { - /* - * Unlike the longest extent available in an AG, we don't track - * the length of an AG's shortest extent. - * XFS_ERRTAG_BMAP_ALLOC_MINLEN_EXTENT is a debug only knob and - * hence we can afford to start traversing from the 0th AG since - * we need not be concerned about a drop in performance in - * "debug only" code paths. - */ - ap->blkno = XFS_AGB_TO_FSB(mp, 0, 0); - } else { - ap->blkno = ap->tp->t_firstblock; - } + /* + * Unlike the longest extent available in an AG, we don't track + * the length of an AG's shortest extent. + * XFS_ERRTAG_BMAP_ALLOC_MINLEN_EXTENT is a debug only knob and + * hence we can afford to start traversing from the 0th AG since + * we need not be concerned about a drop in performance in + * "debug only" code paths. + */ + ap->blkno = XFS_AGB_TO_FSB(mp, 0, 0); args.fsbno = ap->blkno; args.oinfo = XFS_RMAP_OINFO_SKIP_UPDATE; @@ -3515,13 +3487,11 @@ xfs_bmap_btalloc( struct xfs_mount *mp = ap->ip->i_mount; struct xfs_alloc_arg args = { .tp = ap->tp, .mp = mp }; xfs_alloctype_t atype = 0; - xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ xfs_agnumber_t ag; xfs_fileoff_t orig_offset; xfs_extlen_t orig_length; xfs_extlen_t blen; xfs_extlen_t nextminlen = 0; - int nullfb; /* true if ap->firstblock isn't set */ int isaligned; int tryagain; int error; @@ -3533,34 +3503,17 @@ xfs_bmap_btalloc( stripe_align = xfs_bmap_compute_alignments(ap, &args); - nullfb = ap->tp->t_firstblock == NULLFSBLOCK; - fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, - ap->tp->t_firstblock); - if (nullfb) { - if ((ap->datatype & XFS_ALLOC_USERDATA) && - xfs_inode_is_filestream(ap->ip)) { - ag = xfs_filestream_lookup_ag(ap->ip); - ag = (ag != NULLAGNUMBER) ? ag : 0; - ap->blkno = XFS_AGB_TO_FSB(mp, ag, 0); - } else { - ap->blkno = XFS_INO_TO_FSB(mp, ap->ip->i_ino); - } - } else - ap->blkno = ap->tp->t_firstblock; + if ((ap->datatype & XFS_ALLOC_USERDATA) && + xfs_inode_is_filestream(ap->ip)) { + ag = xfs_filestream_lookup_ag(ap->ip); + ag = (ag != NULLAGNUMBER) ? ag : 0; + ap->blkno = XFS_AGB_TO_FSB(mp, ag, 0); + } else { + ap->blkno = XFS_INO_TO_FSB(mp, ap->ip->i_ino); + } xfs_bmap_adjacent(ap); - /* - * If allowed, use ap->blkno; otherwise must use firstblock since - * it's in the right allocation group. - */ - if (nullfb || XFS_FSB_TO_AGNO(mp, ap->blkno) == fb_agno) - ; - else - ap->blkno = ap->tp->t_firstblock; - /* - * Normal allocation, done through xfs_alloc_vextent. - */ tryagain = isaligned = 0; args.fsbno = ap->blkno; args.oinfo = XFS_RMAP_OINFO_SKIP_UPDATE; @@ -3568,30 +3521,19 @@ xfs_bmap_btalloc( /* Trim the allocation back to the maximum an AG can fit. */ args.maxlen = min(ap->length, mp->m_ag_max_usable); blen = 0; - if (nullfb) { - /* - * Search for an allocation group with a single extent large - * enough for the request. If one isn't found, then adjust - * the minimum allocation size to the largest space found. - */ - if ((ap->datatype & XFS_ALLOC_USERDATA) && - xfs_inode_is_filestream(ap->ip)) - error = xfs_bmap_btalloc_filestreams(ap, &args, &blen); - else - error = xfs_bmap_btalloc_nullfb(ap, &args, &blen); - if (error) - return error; - } else if (ap->tp->t_flags & XFS_TRANS_LOWMODE) { - if (xfs_inode_is_filestream(ap->ip)) - args.type = XFS_ALLOCTYPE_FIRST_AG; - else - args.type = XFS_ALLOCTYPE_START_BNO; - args.total = args.minlen = ap->minlen; - } else { - args.type = XFS_ALLOCTYPE_NEAR_BNO; - args.total = ap->total; - args.minlen = ap->minlen; - } + + /* + * Search for an allocation group with a single extent large + * enough for the request. If one isn't found, then adjust + * the minimum allocation size to the largest space found. + */ + if ((ap->datatype & XFS_ALLOC_USERDATA) && + xfs_inode_is_filestream(ap->ip)) + error = xfs_bmap_btalloc_filestreams(ap, &args, &blen); + else + error = xfs_bmap_btalloc_select_lengths(ap, &args, &blen); + if (error) + return error; /* * If we are not low on available data blocks, and the underlying @@ -3678,7 +3620,7 @@ xfs_bmap_btalloc( if ((error = xfs_alloc_vextent(&args))) return error; } - if (args.fsbno == NULLFSBLOCK && nullfb && + if (args.fsbno == NULLFSBLOCK && args.minlen > ap->minlen) { args.minlen = ap->minlen; args.type = XFS_ALLOCTYPE_START_BNO; @@ -3686,7 +3628,7 @@ xfs_bmap_btalloc( if ((error = xfs_alloc_vextent(&args))) return error; } - if (args.fsbno == NULLFSBLOCK && nullfb) { + if (args.fsbno == NULLFSBLOCK) { args.fsbno = 0; args.type = XFS_ALLOCTYPE_FIRST_AG; args.total = ap->minlen; diff --git a/fs/xfs/libxfs/xfs_bmap.h b/fs/xfs/libxfs/xfs_bmap.h index 08c16e4edc0f..0ffc0d998850 100644 --- a/fs/xfs/libxfs/xfs_bmap.h +++ b/fs/xfs/libxfs/xfs_bmap.h @@ -269,4 +269,5 @@ extern struct kmem_cache *xfs_bmap_intent_cache; int __init xfs_bmap_intent_init_cache(void); void xfs_bmap_intent_destroy_cache(void); + #endif /* __XFS_BMAP_H__ */ diff --git a/fs/xfs/libxfs/xfs_bmap_btree.c b/fs/xfs/libxfs/xfs_bmap_btree.c index 18de4fbfef4e..76a0f0d260a4 100644 --- a/fs/xfs/libxfs/xfs_bmap_btree.c +++ b/fs/xfs/libxfs/xfs_bmap_btree.c @@ -206,28 +206,21 @@ xfs_bmbt_alloc_block( memset(&args, 0, sizeof(args)); args.tp = cur->bc_tp; args.mp = cur->bc_mp; - args.fsbno = cur->bc_tp->t_firstblock; xfs_rmap_ino_bmbt_owner(&args.oinfo, cur->bc_ino.ip->i_ino, cur->bc_ino.whichfork); - if (args.fsbno == NULLFSBLOCK) { - args.fsbno = be64_to_cpu(start->l); - args.type = XFS_ALLOCTYPE_START_BNO; + args.fsbno = be64_to_cpu(start->l); + args.type = XFS_ALLOCTYPE_START_BNO; - /* - * If we are coming here from something like unwritten extent - * conversion, there has been no data extent allocation already - * done, so we have to ensure that we attempt to locate the - * entire set of bmbt allocations in the same AG, as - * xfs_bmapi_write() would have reserved. - */ + /* + * If we are coming here from something like unwritten extent + * conversion, there has been no data extent allocation already done, so + * we have to ensure that we attempt to locate the entire set of bmbt + * allocations in the same AG, as xfs_bmapi_write() would have reserved. + */ + if (cur->bc_tp->t_firstblock == NULLFSBLOCK) args.minleft = xfs_bmapi_minleft(cur->bc_tp, cur->bc_ino.ip, - cur->bc_ino.whichfork); - } else if (cur->bc_tp->t_flags & XFS_TRANS_LOWMODE) { - args.type = XFS_ALLOCTYPE_START_BNO; - } else { - args.type = XFS_ALLOCTYPE_NEAR_BNO; - } + cur->bc_ino.whichfork); args.minlen = args.maxlen = args.prod = 1; args.wasdel = cur->bc_ino.flags & XFS_BTCUR_BMBT_WASDEL; @@ -247,7 +240,7 @@ xfs_bmbt_alloc_block( */ args.fsbno = 0; args.minleft = 0; - args.type = XFS_ALLOCTYPE_FIRST_AG; + args.type = XFS_ALLOCTYPE_START_BNO; error = xfs_alloc_vextent(&args); if (error) goto error0; @@ -259,7 +252,6 @@ xfs_bmbt_alloc_block( } ASSERT(args.len == 1); - cur->bc_tp->t_firstblock = args.fsbno; cur->bc_ino.allocated++; cur->bc_ino.ip->i_nblocks++; xfs_trans_log_inode(args.tp, cur->bc_ino.ip, XFS_ILOG_CORE);