diff options
Diffstat (limited to 'src/H5Cpkg.h')
| -rw-r--r-- | src/H5Cpkg.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/H5Cpkg.h b/src/H5Cpkg.h index 3ea5144..321f1fb 100644 --- a/src/H5Cpkg.h +++ b/src/H5Cpkg.h @@ -4104,6 +4104,23 @@ typedef struct H5C_tag_info_t { * of changes to the file driver info superblock extension * management code needed to support rings. * + * msic_in_progress: As the metadata cache has become re-entrant, and as + * the free space manager code has become more tightly + * integrated with the metadata cache, it is possible that + * a call to H5C_insert_entry() may trigger a call to + * H5C_make_space_in_cache(), which, via H5C__flush_single_entry() + * and client callbacks, may trigger an infinite regression + * of calls to H5C_make_space_in_cache(). + * + * The msic_in_progress boolean flag is used to detect this, + * and prevent the infinite regression that would otherwise + * occur. + * + * Note that this is issue is not hypothetical -- this field + * was added 2/16/17 to address this issue when it was + * exposed by modifications to test/fheap.c to cause it to + * use paged allocation. + * * resize_ctl: Instance of H5C_auto_size_ctl_t containing configuration * data for automatic cache resizing. * @@ -4743,6 +4760,7 @@ struct H5C_t { hbool_t cache_full; hbool_t size_decreased; hbool_t resize_in_progress; + hbool_t msic_in_progress; H5C_auto_size_ctl_t resize_ctl; /* Fields for epoch markers used in automatic cache size adjustment */ |