| Message ID | 20211109015055.1547604-14-david@fromorbit.com (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Headers | show |
| Series | xfs: rework xlog_write() | expand |
On Tue, Nov 09, 2021 at 12:50:52PM +1100, Dave Chinner wrote: > From: Christoph Hellwig <hch@lst.de> > > Just check that the offset in xlog_write_vec is smaller than the iclog > size and remove the expensive cycling through all iclogs. > > Signed-off-by: Christoph Hellwig <hch@lst.de> > Reviewed-by: Brian Foster <bfoster@redhat.com> > Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com> > Signed-off-by: Dave Chinner <david@fromorbit.com> Took a while to wrap my head around, but I got there. Reviewed-by: Darrick J. Wong <djwong@kernel.org> --D > --- > fs/xfs/xfs_log.c | 35 +---------------------------------- > fs/xfs/xfs_log_priv.h | 4 ---- > 2 files changed, 1 insertion(+), 38 deletions(-) > > diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c > index 02db5a712e76..d6ef555b1310 100644 > --- a/fs/xfs/xfs_log.c > +++ b/fs/xfs/xfs_log.c > @@ -61,10 +61,6 @@ xlog_sync( > struct xlog_in_core *iclog); > #if defined(DEBUG) > STATIC void > -xlog_verify_dest_ptr( > - struct xlog *log, > - void *ptr); > -STATIC void > xlog_verify_grant_tail( > struct xlog *log); > STATIC void > @@ -77,7 +73,6 @@ xlog_verify_tail_lsn( > struct xlog *log, > struct xlog_in_core *iclog); > #else > -#define xlog_verify_dest_ptr(a,b) > #define xlog_verify_grant_tail(a) > #define xlog_verify_iclog(a,b,c) > #define xlog_verify_tail_lsn(a,b) > @@ -1640,9 +1635,6 @@ xlog_alloc_log( > GFP_KERNEL | __GFP_RETRY_MAYFAIL); > if (!iclog->ic_data) > goto out_free_iclog; > -#ifdef DEBUG > - log->l_iclog_bak[i] = &iclog->ic_header; > -#endif > head = &iclog->ic_header; > memset(head, 0, sizeof(xlog_rec_header_t)); > head->h_magicno = cpu_to_be32(XLOG_HEADER_MAGIC_NUM); > @@ -2234,6 +2226,7 @@ xlog_write_iovec( > uint32_t *record_cnt, > uint32_t *data_cnt) > { > + ASSERT(*log_offset < iclog->ic_log->l_iclog_size); > ASSERT(*log_offset % sizeof(int32_t) == 0); > ASSERT(write_len % sizeof(int32_t) == 0); > > @@ -2329,7 +2322,6 @@ xlog_write_partial( > int *contwr) > { > struct xlog_in_core *iclog = *iclogp; > - struct xlog *log = iclog->ic_log; > struct xlog_op_header *ophdr; > int index = 0; > uint32_t rlen; > @@ -2368,7 +2360,6 @@ xlog_write_partial( > if (rlen != reg->i_len) > ophdr->oh_flags |= XLOG_CONTINUE_TRANS; > > - xlog_verify_dest_ptr(log, iclog->ic_datap + *log_offset); > xlog_write_iovec(iclog, log_offset, reg->i_addr, > rlen, len, record_cnt, data_cnt); > > @@ -2436,7 +2427,6 @@ xlog_write_partial( > rlen = min_t(uint32_t, rlen, iclog->ic_size - *log_offset); > ophdr->oh_len = cpu_to_be32(rlen); > > - xlog_verify_dest_ptr(log, iclog->ic_datap + *log_offset); > xlog_write_iovec(iclog, log_offset, > reg->i_addr + reg_offset, > rlen, len, record_cnt, data_cnt); > @@ -3560,29 +3550,6 @@ xlog_ticket_alloc( > } > > #if defined(DEBUG) > -/* > - * Make sure that the destination ptr is within the valid data region of > - * one of the iclogs. This uses backup pointers stored in a different > - * part of the log in case we trash the log structure. > - */ > -STATIC void > -xlog_verify_dest_ptr( > - struct xlog *log, > - void *ptr) > -{ > - int i; > - int good_ptr = 0; > - > - for (i = 0; i < log->l_iclog_bufs; i++) { > - if (ptr >= log->l_iclog_bak[i] && > - ptr <= log->l_iclog_bak[i] + log->l_iclog_size) > - good_ptr++; > - } > - > - if (!good_ptr) > - xfs_emerg(log->l_mp, "%s: invalid ptr", __func__); > -} > - > /* > * Check to make sure the grant write head didn't just over lap the tail. If > * the cycles are the same, we can't be overlapping. Otherwise, make sure that > diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h > index 6e9c7d924363..8c98b57e2a63 100644 > --- a/fs/xfs/xfs_log_priv.h > +++ b/fs/xfs/xfs_log_priv.h > @@ -420,10 +420,6 @@ struct xlog { > > struct xfs_kobj l_kobj; > > - /* The following field are used for debugging; need to hold icloglock */ > -#ifdef DEBUG > - void *l_iclog_bak[XLOG_MAX_ICLOGS]; > -#endif > /* log recovery lsn tracking (for buffer submission */ > xfs_lsn_t l_recovery_lsn; > > -- > 2.33.0 >
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 02db5a712e76..d6ef555b1310 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -61,10 +61,6 @@ xlog_sync( struct xlog_in_core *iclog); #if defined(DEBUG) STATIC void -xlog_verify_dest_ptr( - struct xlog *log, - void *ptr); -STATIC void xlog_verify_grant_tail( struct xlog *log); STATIC void @@ -77,7 +73,6 @@ xlog_verify_tail_lsn( struct xlog *log, struct xlog_in_core *iclog); #else -#define xlog_verify_dest_ptr(a,b) #define xlog_verify_grant_tail(a) #define xlog_verify_iclog(a,b,c) #define xlog_verify_tail_lsn(a,b) @@ -1640,9 +1635,6 @@ xlog_alloc_log( GFP_KERNEL | __GFP_RETRY_MAYFAIL); if (!iclog->ic_data) goto out_free_iclog; -#ifdef DEBUG - log->l_iclog_bak[i] = &iclog->ic_header; -#endif head = &iclog->ic_header; memset(head, 0, sizeof(xlog_rec_header_t)); head->h_magicno = cpu_to_be32(XLOG_HEADER_MAGIC_NUM); @@ -2234,6 +2226,7 @@ xlog_write_iovec( uint32_t *record_cnt, uint32_t *data_cnt) { + ASSERT(*log_offset < iclog->ic_log->l_iclog_size); ASSERT(*log_offset % sizeof(int32_t) == 0); ASSERT(write_len % sizeof(int32_t) == 0); @@ -2329,7 +2322,6 @@ xlog_write_partial( int *contwr) { struct xlog_in_core *iclog = *iclogp; - struct xlog *log = iclog->ic_log; struct xlog_op_header *ophdr; int index = 0; uint32_t rlen; @@ -2368,7 +2360,6 @@ xlog_write_partial( if (rlen != reg->i_len) ophdr->oh_flags |= XLOG_CONTINUE_TRANS; - xlog_verify_dest_ptr(log, iclog->ic_datap + *log_offset); xlog_write_iovec(iclog, log_offset, reg->i_addr, rlen, len, record_cnt, data_cnt); @@ -2436,7 +2427,6 @@ xlog_write_partial( rlen = min_t(uint32_t, rlen, iclog->ic_size - *log_offset); ophdr->oh_len = cpu_to_be32(rlen); - xlog_verify_dest_ptr(log, iclog->ic_datap + *log_offset); xlog_write_iovec(iclog, log_offset, reg->i_addr + reg_offset, rlen, len, record_cnt, data_cnt); @@ -3560,29 +3550,6 @@ xlog_ticket_alloc( } #if defined(DEBUG) -/* - * Make sure that the destination ptr is within the valid data region of - * one of the iclogs. This uses backup pointers stored in a different - * part of the log in case we trash the log structure. - */ -STATIC void -xlog_verify_dest_ptr( - struct xlog *log, - void *ptr) -{ - int i; - int good_ptr = 0; - - for (i = 0; i < log->l_iclog_bufs; i++) { - if (ptr >= log->l_iclog_bak[i] && - ptr <= log->l_iclog_bak[i] + log->l_iclog_size) - good_ptr++; - } - - if (!good_ptr) - xfs_emerg(log->l_mp, "%s: invalid ptr", __func__); -} - /* * Check to make sure the grant write head didn't just over lap the tail. If * the cycles are the same, we can't be overlapping. Otherwise, make sure that diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index 6e9c7d924363..8c98b57e2a63 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -420,10 +420,6 @@ struct xlog { struct xfs_kobj l_kobj; - /* The following field are used for debugging; need to hold icloglock */ -#ifdef DEBUG - void *l_iclog_bak[XLOG_MAX_ICLOGS]; -#endif /* log recovery lsn tracking (for buffer submission */ xfs_lsn_t l_recovery_lsn;