Mercurial > hg > nginx-quic
view src/os/win32/ngx_process.h @ 7374:de50fa05fbeb
Cache: fixed minimum cache keys zone size limit.
Size of a shared memory zones must be at least two pages - one page
for slab allocator internal data, and another page for actual allocations.
Using 8192 instead is wrong, as there are systems with page sizes other
than 4096.
Note well that two pages is usually too low as well. In particular, cache
is likely to use two allocations of different sizes for global structures,
and at least four pages will be needed to properly allocate cache nodes.
Except in a few very special cases, with keys zone of just two pages nginx
won't be able to start. Other uses of shared memory impose a limit
of 8 pages, which provides some room for global allocations. This patch
doesn't try to address this though.
Inspired by ticket #1665.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Wed, 31 Oct 2018 16:49:39 +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_ */