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annotate src/os/unix/ngx_linux_init.c @ 7668:0a04e5e4c40b

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Large block sizes on Linux are now ignored (ticket #1168). NFS on Linux is known to report wsize as a block size (in both f_bsize and f_frsize, both in statfs() and statvfs()). On the other hand, typical file system block sizes on Linux (ext2/ext3/ext4, XFS) are limited to pagesize. (With FAT, block sizes can be at least up to 512k in extreme cases, but this doesn't really matter, see below.) To avoid too aggressive cache clearing on NFS volumes on Linux, block sizes larger than pagesize are now ignored. Note that it is safe to ignore large block sizes. Since 3899:e7cd13b7f759 (1.0.1) cache size is calculated based on fstat() st_blocks, and rounding to file system block size is preserved mostly for Windows. Note well that on other OSes valid block sizes seen are at least up to 65536. In particular, UFS on FreeBSD is known to work well with block and fragment sizes set to 65536.
author Maxim Dounin <mdounin@mdounin.ru>
date Mon, 22 Jun 2020 18:02:58 +0300
parents 56fc55e32f23
children
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
Igor Sysoev <igor@sysoev.ru>
parents: 417
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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2 /*
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42d11f017717 nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
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3 * Copyright (C) Igor Sysoev
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d620f497c50f Copyright updated.
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4 * Copyright (C) Nginx, Inc.
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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5 */
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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2e069b6e6920 nginx-0.0.1-2003-06-04-21:28:33 import
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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12 u_char ngx_linux_kern_ostype[50];
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13 u_char ngx_linux_kern_osrelease[50];
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b80f94fa2197 nginx-0.3.58-RELEASE import
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16 static ngx_os_io_t ngx_linux_io = {
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17 ngx_unix_recv,
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18 ngx_readv_chain,
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0b592a68aade ngx_udp_recv()
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19 ngx_udp_unix_recv,
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0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
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20 ngx_unix_send,
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8f038068f4bc Stream: UDP proxy.
Roman Arutyunyan <arut@nginx.com>
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21 ngx_udp_unix_send,
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56fc55e32f23 Stream: filters.
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22 ngx_udp_unix_sendmsg_chain,
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23 #if (NGX_HAVE_SENDFILE)
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24 ngx_linux_sendfile_chain,
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25 NGX_IO_SENDFILE
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26 #else
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27 ngx_writev_chain,
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28 0
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29 #endif
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30 };
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32
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33 ngx_int_t
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34 ngx_os_specific_init(ngx_log_t *log)
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35 {
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36 struct utsname u;
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38 if (uname(&u) == -1) {
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39 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "uname() failed");
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40 return NGX_ERROR;
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41 }
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43 (void) ngx_cpystrn(ngx_linux_kern_ostype, (u_char *) u.sysname,
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44 sizeof(ngx_linux_kern_ostype));
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46 (void) ngx_cpystrn(ngx_linux_kern_osrelease, (u_char *) u.release,
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47 sizeof(ngx_linux_kern_osrelease));
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48
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49 ngx_os_io = ngx_linux_io;
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50
371c1cee100d nginx-0.1.44-RELEASE import
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51 return NGX_OK;
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52 }
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3b1e8c9df9ad nginx-0.1.0-2004-10-04-00:02:06 import
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3b1e8c9df9ad nginx-0.1.0-2004-10-04-00:02:06 import
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975f62e77f02 nginx-0.1.21-RELEASE import
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55 void
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56 ngx_os_specific_status(ngx_log_t *log)
449
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57 {
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58 ngx_log_error(NGX_LOG_NOTICE, log, 0, "OS: %s %s",
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59 ngx_linux_kern_ostype, ngx_linux_kern_osrelease);
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60 }