diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-06-27 19:47:46 +0300 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-06-27 19:47:46 +0300 |
commit | 546fac60739ef8d7cbf8ce0b8251a519f68b2804 (patch) | |
tree | 8ddfc9346814d3c9ae2e94365e9fd28fa7b1e02b /fs/gfs2/rgrp.c | |
parent | ebeaa8ddb3663b5c6cfc205605c35116381550c5 (diff) | |
parent | 39b0f1e9290880a6c905f639e7db6b646e302a4f (diff) | |
download | linux-546fac60739ef8d7cbf8ce0b8251a519f68b2804.tar.xz |
Merge tag 'gfs2-merge-window' of git://git.kernel.org:/pub/scm/linux/kernel/git/gfs2/linux-gfs2
Pull GFS2 updates from Bob Peterson:
"Here are the patches we've accumulated for GFS2 for the current
upstream merge window. We have a good mixture this time. Here are
some of the features:
- Fix a problem with RO mounts writing to the journal.
- Further improvements to quotas on GFS2.
- Added support for rename2 and RENAME_EXCHANGE on GFS2.
- Increase performance by making glock lru_list less of a bottleneck.
- Increase performance by avoiding unnecessary buffer_head releases.
- Increase performance by using average glock round trip time from all CPUs.
- Fixes for some compiler warnings and minor white space issues.
- Other misc bug fixes"
* tag 'gfs2-merge-window' of git://git.kernel.org:/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
GFS2: Don't brelse rgrp buffer_heads every allocation
GFS2: Don't add all glocks to the lru
gfs2: Don't support fallocate on jdata files
gfs2: s64 cast for negative quota value
gfs2: limit quota log messages
gfs2: fix quota updates on block boundaries
gfs2: fix shadow warning in gfs2_rbm_find()
gfs2: kerneldoc warning fixes
gfs2: convert simple_str to kstr
GFS2: make sure S_NOSEC flag isn't overwritten
GFS2: add support for rename2 and RENAME_EXCHANGE
gfs2: handle NULL rgd in set_rgrp_preferences
GFS2: inode.c: indent with TABs, not spaces
GFS2: mark the journal idle to fix ro mounts
GFS2: Average in only non-zero round-trip times for congestion stats
GFS2: Use average srttb value in congestion calculations
Diffstat (limited to 'fs/gfs2/rgrp.c')
-rw-r--r-- | fs/gfs2/rgrp.c | 48 |
1 files changed, 35 insertions, 13 deletions
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c index 6af2396a317c..c6c62321dfd6 100644 --- a/fs/gfs2/rgrp.c +++ b/fs/gfs2/rgrp.c @@ -978,10 +978,10 @@ static void set_rgrp_preferences(struct gfs2_sbd *sdp) rgd->rd_flags |= GFS2_RDF_PREFERRED; for (i = 0; i < sdp->sd_journals; i++) { rgd = gfs2_rgrpd_get_next(rgd); - if (rgd == first) + if (!rgd || rgd == first) break; } - } while (rgd != first); + } while (rgd && rgd != first); } /** @@ -1244,14 +1244,13 @@ int gfs2_rgrp_go_lock(struct gfs2_holder *gh) } /** - * gfs2_rgrp_go_unlock - Release RG bitmaps read in with gfs2_rgrp_bh_get() - * @gh: The glock holder for the resource group + * gfs2_rgrp_brelse - Release RG bitmaps read in with gfs2_rgrp_bh_get() + * @rgd: The resource group * */ -void gfs2_rgrp_go_unlock(struct gfs2_holder *gh) +void gfs2_rgrp_brelse(struct gfs2_rgrpd *rgd) { - struct gfs2_rgrpd *rgd = gh->gh_gl->gl_object; int x, length = rgd->rd_length; for (x = 0; x < length; x++) { @@ -1264,6 +1263,22 @@ void gfs2_rgrp_go_unlock(struct gfs2_holder *gh) } +/** + * gfs2_rgrp_go_unlock - Unlock a rgrp glock + * @gh: The glock holder for the resource group + * + */ + +void gfs2_rgrp_go_unlock(struct gfs2_holder *gh) +{ + struct gfs2_rgrpd *rgd = gh->gh_gl->gl_object; + int demote_requested = test_bit(GLF_DEMOTE, &gh->gh_gl->gl_flags) | + test_bit(GLF_PENDING_DEMOTE, &gh->gh_gl->gl_flags); + + if (rgd && demote_requested) + gfs2_rgrp_brelse(rgd); +} + int gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset, struct buffer_head *bh, const struct gfs2_bitmap *bi, unsigned minlen, u64 *ptrimmed) @@ -1711,10 +1726,8 @@ static int gfs2_rbm_find(struct gfs2_rbm *rbm, u8 state, u32 *minext, return ret; bitmap_full: /* Mark bitmap as full and fall through */ - if ((state == GFS2_BLKST_FREE) && initial_offset == 0) { - struct gfs2_bitmap *bi = rbm_bi(rbm); + if ((state == GFS2_BLKST_FREE) && initial_offset == 0) set_bit(GBF_FULL, &bi->bi_flags); - } next_bitmap: /* Find next bitmap in the rgrp */ rbm->offset = 0; @@ -1850,14 +1863,23 @@ static bool gfs2_rgrp_congested(const struct gfs2_rgrpd *rgd, int loops) const struct gfs2_sbd *sdp = gl->gl_sbd; struct gfs2_lkstats *st; s64 r_dcount, l_dcount; - s64 r_srttb, l_srttb; + s64 l_srttb, a_srttb = 0; s64 srttb_diff; s64 sqr_diff; s64 var; + int cpu, nonzero = 0; preempt_disable(); + for_each_present_cpu(cpu) { + st = &per_cpu_ptr(sdp->sd_lkstats, cpu)->lkstats[LM_TYPE_RGRP]; + if (st->stats[GFS2_LKS_SRTTB]) { + a_srttb += st->stats[GFS2_LKS_SRTTB]; + nonzero++; + } + } st = &this_cpu_ptr(sdp->sd_lkstats)->lkstats[LM_TYPE_RGRP]; - r_srttb = st->stats[GFS2_LKS_SRTTB]; + if (nonzero) + do_div(a_srttb, nonzero); r_dcount = st->stats[GFS2_LKS_DCOUNT]; var = st->stats[GFS2_LKS_SRTTVARB] + gl->gl_stats.stats[GFS2_LKS_SRTTVARB]; @@ -1866,10 +1888,10 @@ static bool gfs2_rgrp_congested(const struct gfs2_rgrpd *rgd, int loops) l_srttb = gl->gl_stats.stats[GFS2_LKS_SRTTB]; l_dcount = gl->gl_stats.stats[GFS2_LKS_DCOUNT]; - if ((l_dcount < 1) || (r_dcount < 1) || (r_srttb == 0)) + if ((l_dcount < 1) || (r_dcount < 1) || (a_srttb == 0)) return false; - srttb_diff = r_srttb - l_srttb; + srttb_diff = a_srttb - l_srttb; sqr_diff = srttb_diff * srttb_diff; var *= 2; |