Mercurial > hg > nginx
changeset 7669:52b34c3f89b4
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.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Mon, 22 Jun 2020 18:02:59 +0300 |
parents | 0a04e5e4c40b |
children | ccb5ff87ab3e |
files | src/os/unix/ngx_files.h |
diffstat | 1 files changed, 4 insertions(+), 1 deletions(-) [+] |
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--- a/src/os/unix/ngx_files.h Mon Jun 22 18:02:58 2020 +0300 +++ b/src/os/unix/ngx_files.h Mon Jun 22 18:02:59 2020 +0300 @@ -185,7 +185,10 @@ #define ngx_is_exec(sb) (((sb)->st_mode & S_IXUSR) == S_IXUSR) #define ngx_file_access(sb) ((sb)->st_mode & 0777) #define ngx_file_size(sb) (sb)->st_size -#define ngx_file_fs_size(sb) ngx_max((sb)->st_size, (sb)->st_blocks * 512) +#define ngx_file_fs_size(sb) \ + (((sb)->st_blocks * 512 > (sb)->st_size \ + && (sb)->st_blocks * 512 < (sb)->st_size + 8 * (sb)->st_blksize) \ + ? (sb)->st_blocks * 512 : (sb)->st_size) #define ngx_file_mtime(sb) (sb)->st_mtime #define ngx_file_uniq(sb) (sb)->st_ino