Mercurial > hg > nginx
view src/os/unix/ngx_linux_init.c @ 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 | 56fc55e32f23 |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> u_char ngx_linux_kern_ostype[50]; u_char ngx_linux_kern_osrelease[50]; static ngx_os_io_t ngx_linux_io = { ngx_unix_recv, ngx_readv_chain, ngx_udp_unix_recv, ngx_unix_send, ngx_udp_unix_send, ngx_udp_unix_sendmsg_chain, #if (NGX_HAVE_SENDFILE) ngx_linux_sendfile_chain, NGX_IO_SENDFILE #else ngx_writev_chain, 0 #endif }; ngx_int_t ngx_os_specific_init(ngx_log_t *log) { struct utsname u; if (uname(&u) == -1) { ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "uname() failed"); return NGX_ERROR; } (void) ngx_cpystrn(ngx_linux_kern_ostype, (u_char *) u.sysname, sizeof(ngx_linux_kern_ostype)); (void) ngx_cpystrn(ngx_linux_kern_osrelease, (u_char *) u.release, sizeof(ngx_linux_kern_osrelease)); ngx_os_io = ngx_linux_io; return NGX_OK; } void ngx_os_specific_status(ngx_log_t *log) { ngx_log_error(NGX_LOG_NOTICE, log, 0, "OS: %s %s", ngx_linux_kern_ostype, ngx_linux_kern_osrelease); }