Mercurial > hg > nginx-quic
view src/os/win32/ngx_process.h @ 7971:0a04e5e4c40b
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 | 8b84d60ef13d |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_PROCESS_H_INCLUDED_ #define _NGX_PROCESS_H_INCLUDED_ typedef DWORD ngx_pid_t; #define NGX_INVALID_PID 0 #define ngx_getpid GetCurrentProcessId #define ngx_getppid() 0 #define ngx_log_pid ngx_pid #define NGX_PROCESS_SYNC_NAME \ (sizeof("ngx_cache_manager_mutex_") + NGX_INT32_LEN) typedef uint64_t ngx_cpuset_t; typedef struct { HANDLE handle; ngx_pid_t pid; char *name; HANDLE term; HANDLE quit; HANDLE reopen; u_char term_event[NGX_PROCESS_SYNC_NAME]; u_char quit_event[NGX_PROCESS_SYNC_NAME]; u_char reopen_event[NGX_PROCESS_SYNC_NAME]; unsigned just_spawn:1; unsigned exiting:1; } ngx_process_t; typedef struct { char *path; char *name; char *args; char *const *argv; char *const *envp; HANDLE child; } ngx_exec_ctx_t; ngx_pid_t ngx_spawn_process(ngx_cycle_t *cycle, char *name, ngx_int_t respawn); ngx_pid_t ngx_execute(ngx_cycle_t *cycle, ngx_exec_ctx_t *ctx); #define ngx_debug_point() #define ngx_sched_yield() SwitchToThread() #define NGX_MAX_PROCESSES (MAXIMUM_WAIT_OBJECTS - 4) #define NGX_PROCESS_RESPAWN -2 #define NGX_PROCESS_JUST_RESPAWN -3 extern int ngx_argc; extern char **ngx_argv; extern char **ngx_os_argv; extern ngx_int_t ngx_last_process; extern ngx_process_t ngx_processes[NGX_MAX_PROCESSES]; extern ngx_pid_t ngx_pid; extern ngx_pid_t ngx_parent; #endif /* _NGX_PROCESS_H_INCLUDED_ */