723e51327f
The main purpose of this patch is to fix handling of unpause calls from PM while another call is ongoing. The solution to this problem sparked a full revision of the threading model, consisting of a large number of related changes: - all active worker threads are now always associated with a process, and every process has at most one active thread working for it; - the process lock is always held by a process's worker thread; - a process can now have both normal work and postponed PM work associated to it; - timer expiry and non-postponed PM work is done from the main thread; - filp garbage collection is done from a thread associated with VFS; - reboot calls from PM are now done from a thread associated with PM; - the DS events handler is protected from starting multiple threads; - support for a system worker thread has been removed; - the deadlock recovery thread has been replaced by a parameter to the worker_start() function; the number of worker threads has consequently been increased by one; - saving and restoring of global but per-thread variables is now centralized in worker_suspend() and worker_resume(); err_code is now saved and restored in all cases; - the concept of jobs has been removed, and job_m_in now points to a message stored in the worker thread structure instead; - the PM lock has been removed; - the separate exec lock has been replaced by a lock on the VM process, which was already being locked for exec calls anyway; - PM_UNPAUSE is now processed as a postponed PM request, from a thread associated with the target process; - the FP_DROP_WORK flag has been removed, since it is no longer more than just an optimization and only applied to processes operating on a pipe when getting killed; - assignment to "fp" now takes place only when obtaining new work in the main thread or a worker thread, when resuming execution of a thread, and in the special case of exiting processes during reboot; - there are no longer special cases where the yield() call is used to force a thread to run. Change-Id: I7a97b9b95c2450454a9b5318dfa0e6150d4e6858
36 lines
777 B
C
36 lines
777 B
C
#ifndef __VFS_FS_H__
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#define __VFS_FS_H__
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/* This is the master header for fs. It includes some other files
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* and defines the principal constants.
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*/
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#define _SYSTEM 1 /* tell headers that this is the kernel */
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/* The following are so basic, all the *.c files get them automatically. */
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#include <minix/config.h> /* MUST be first */
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#include <sys/types.h>
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#include <minix/const.h>
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#include <minix/type.h>
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#include <minix/dmap.h>
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#include <minix/ds.h>
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#include <minix/rs.h>
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#include <limits.h>
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#include <errno.h>
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#include <unistd.h>
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#include <minix/syslib.h>
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#include <minix/sysutil.h>
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#include <minix/timers.h>
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#include "const.h"
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#include "dmap.h"
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#include "proto.h"
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#include "threads.h"
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#include "glo.h"
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#include "type.h"
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#include "vmnt.h"
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#include "fproc.h"
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#endif
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