Konstantin Khorenko <khore...@virtuozzo.com> writes:
> We faced a situation when all (32) cpus on a node content on sbi->s_es_lock
> shrinking extents on a single superblock and
> shrinking extents goes very slow (180 sec in average!).
>
> crash> struct ext4_sb_info 0xffff882fcb7ca800 -p
>
> s_es_nr_inode = 3173832,
> s_es_stats = {
> es_stats_shrunk = 70,
> es_stats_cache_hits = 35182748,
> es_stats_cache_misses = 2622931,
> es_stats_scan_time = 182642303461,
> es_stats_max_scan_time = 276290979674,
>
> This patchset speeds up parallel shrink a bit.
> If we findout this is not enough, next step is to limit the number of
> shrinkers
> working on a single superslock in parallel.
>
> https://jira.sw.ru/browse/PSBM-83335
>
> Jan Kara (1):
> ms/ext4: move handling of list of shrinkable inodes into extent status
> code
>
> Konstantin Khorenko (1):
> ext4: don't iterate over sbi->s_es_list more than the number of
> elements
>
> Waiman Long (1):
> ext4: Make cache hits/misses per-cpu counts
ACK.
>
> fs/ext4/extents.c | 2 --
> fs/ext4/extents_status.c | 56
> +++++++++++++++++++++++++++++++++++++-----------
> fs/ext4/extents_status.h | 6 ++----
> fs/ext4/inode.c | 2 --
> fs/ext4/ioctl.c | 2 --
> fs/ext4/super.c | 1 -
> 6 files changed, 45 insertions(+), 24 deletions(-)
>
> --
> 2.15.1
signature.asc
Description: PGP signature
_______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
