tree 420eddf465c43193b921ecab06e9211d6400b4bb
parent b32a30ad91e075d30dcc63398fb23c7a8c3a2152
author Maxim Dounin <mdounin@mdounin.ru> 1592838179 +0300
committer Maxim Dounin <mdounin@mdounin.ru> 1592838179 +0300

Too large st_blocks values are now ignored (ticket #157).

With XFS, using "allocsize=64m" mount option results in large preallocation
being reported in the st_blocks as returned by fstat() till the file is
closed.  This in turn results in incorrect cache size calculations and
wrong clearing based on max_size.

To avoid too aggressive cache clearing on such volumes, st_blocks values
which result in sizes larger than st_size and eight blocks (an arbitrary
limit) are no longer trusted, and we use st_size instead.

The ngx_de_fs_size() counterpart is intentionally not modified, as
it is used on closed files and hence not affected by this problem.