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uvm_swap_io: if pagedaemon, don't wait for iobuf.

This commit is contained in:
yamt 2008-02-29 20:35:23 +00:00
parent e674d1c49a
commit 19b9de9868
4 changed files with 60 additions and 40 deletions
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4
sys/uvm/uvm_extern.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: uvm_extern.h,v 1.144 2008/01/28 12:22:47 yamt Exp $ */
/* $NetBSD: uvm_extern.h,v 1.145 2008/02/29 20:35:23 yamt Exp $ */
/*
*
@ -690,6 +690,8 @@ void uvm_setpagesize(void);
void uvm_aio_biodone1(struct buf *);
void uvm_aio_biodone(struct buf *);
void uvm_aio_aiodone(struct buf *);
void uvm_aio_aiodone_pages(struct vm_page **, int, bool,
int);
/* uvm_pdaemon.c */
void uvm_pageout(void *);

69
sys/uvm/uvm_pager.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: uvm_pager.c,v 1.90 2008/01/02 11:49:19 ad Exp $ */
/* $NetBSD: uvm_pager.c,v 1.91 2008/02/29 20:35:23 yamt Exp $ */
/*
*
@ -39,7 +39,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uvm_pager.c,v 1.90 2008/01/02 11:49:19 ad Exp $");
__KERNEL_RCSID(0, "$NetBSD: uvm_pager.c,v 1.91 2008/02/29 20:35:23 yamt Exp $");
#include "opt_uvmhist.h"
#include "opt_readahead.h"
@ -291,39 +291,21 @@ uvm_aio_biodone(struct buf *bp)
workqueue_enqueue(uvm.aiodone_queue, &bp->b_work, NULL);
}
/*
* uvm_aio_aiodone: do iodone processing for async i/os.
* this should be called in thread context, not interrupt context.
*/
void
uvm_aio_aiodone(struct buf *bp)
uvm_aio_aiodone_pages(struct vm_page **pgs, int npages, bool write, int error)
{
int npages = bp->b_bufsize >> PAGE_SHIFT;
struct vm_page *pg, *pgs[npages];
struct uvm_object *uobj;
struct vm_page *pg;
kmutex_t *slock;
int i, error, swslot;
int pageout_done = 0;
bool write, swap;
UVMHIST_FUNC("uvm_aio_aiodone"); UVMHIST_CALLED(ubchist);
UVMHIST_LOG(ubchist, "bp %p", bp, 0,0,0);
error = bp->b_error;
write = (bp->b_flags & B_READ) == 0;
/* XXXUBC BC_NOCACHE is for swap pager, should be done differently */
if (write && !(bp->b_cflags & BC_NOCACHE) && bioopsp != NULL)
(*bioopsp->io_pageiodone)(bp);
uobj = NULL;
for (i = 0; i < npages; i++) {
pgs[i] = uvm_pageratop((vaddr_t)bp->b_data + (i << PAGE_SHIFT));
UVMHIST_LOG(ubchist, "pgs[%d] = %p", i, pgs[i],0,0);
}
uvm_pagermapout((vaddr_t)bp->b_data, npages);
int pageout_done;
int swslot;
int i;
bool swap;
swslot = 0;
pageout_done = 0;
slock = NULL;
uobj = NULL;
pg = pgs[0];
swap = (pg->uanon != NULL && pg->uobject == NULL) ||
(pg->pqflags & PQ_AOBJ) != 0;
@ -484,6 +466,37 @@ uvm_aio_aiodone(struct buf *bp)
uvmexp.pdpending--;
#endif /* defined(VMSWAP) */
}
}
/*
* uvm_aio_aiodone: do iodone processing for async i/os.
* this should be called in thread context, not interrupt context.
*/
void
uvm_aio_aiodone(struct buf *bp)
{
int npages = bp->b_bufsize >> PAGE_SHIFT;
struct vm_page *pgs[npages];
int i, error;
bool write;
UVMHIST_FUNC("uvm_aio_aiodone"); UVMHIST_CALLED(ubchist);
UVMHIST_LOG(ubchist, "bp %p", bp, 0,0,0);
error = bp->b_error;
write = (bp->b_flags & B_READ) == 0;
/* XXXUBC BC_NOCACHE is for swap pager, should be done differently */
if (write && !(bp->b_cflags & BC_NOCACHE) && bioopsp != NULL)
(*bioopsp->io_pageiodone)(bp);
for (i = 0; i < npages; i++) {
pgs[i] = uvm_pageratop((vaddr_t)bp->b_data + (i << PAGE_SHIFT));
UVMHIST_LOG(ubchist, "pgs[%d] = %p", i, pgs[i],0,0);
}
uvm_pagermapout((vaddr_t)bp->b_data, npages);
uvm_aio_aiodone_pages(pgs, npages, write, error);
if (write && (bp->b_cflags & BC_AGE) != 0) {
mutex_enter(bp->b_objlock);
vwakeup(bp);

6
sys/uvm/uvm_pdaemon.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: uvm_pdaemon.c,v 1.91 2008/02/07 12:24:16 yamt Exp $ */
/* $NetBSD: uvm_pdaemon.c,v 1.92 2008/02/29 20:35:23 yamt Exp $ */
/*
* Copyright (c) 1997 Charles D. Cranor and Washington University.
@ -71,7 +71,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uvm_pdaemon.c,v 1.91 2008/02/07 12:24:16 yamt Exp $");
__KERNEL_RCSID(0, "$NetBSD: uvm_pdaemon.c,v 1.92 2008/02/29 20:35:23 yamt Exp $");
#include "opt_uvmhist.h"
#include "opt_readahead.h"
@ -537,7 +537,7 @@ swapcluster_flush(struct swapcluster *swc, bool now)
uvmexp.pdpageouts++;
uvm_pageout_start(nused);
error = uvm_swap_put(slot, swc->swc_pages, nused, 0);
KASSERT(error == 0);
KASSERT(error == 0 || error == ENOMEM);
}
/*

21
sys/uvm/uvm_swap.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: uvm_swap.c,v 1.136 2008/01/30 14:25:21 hannken Exp $ */
/* $NetBSD: uvm_swap.c,v 1.137 2008/02/29 20:35:23 yamt Exp $ */
/*
* Copyright (c) 1995, 1996, 1997 Matthew R. Green
@ -32,7 +32,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uvm_swap.c,v 1.136 2008/01/30 14:25:21 hannken Exp $");
__KERNEL_RCSID(0, "$NetBSD: uvm_swap.c,v 1.137 2008/02/29 20:35:23 yamt Exp $");
#include "fs_nfs.h"
#include "opt_uvmhist.h"
@ -1699,6 +1699,17 @@ uvm_swap_io(struct vm_page **pps, int startslot, int npages, int flags)
write = (flags & B_READ) == 0;
async = (flags & B_ASYNC) != 0;
/*
* allocate a buf for the i/o.
*/
KASSERT(curlwp != uvm.pagedaemon_lwp || (write && async));
bp = getiobuf(swapdev_vp, curlwp != uvm.pagedaemon_lwp);
if (bp == NULL) {
uvm_aio_aiodone_pages(pps, npages, true, ENOMEM);
return ENOMEM;
}
/*
* convert starting drum slot to block number
*/
@ -1714,12 +1725,6 @@ uvm_swap_io(struct vm_page **pps, int startslot, int npages, int flags)
UVMPAGER_MAPIN_WAITOK|UVMPAGER_MAPIN_WRITE;
kva = uvm_pagermapin(pps, npages, mapinflags);
/*
* now allocate a buf for the i/o.
*/
bp = getiobuf(swapdev_vp, true);
/*
* fill in the bp/sbp. we currently route our i/o through
* /dev/drum's vnode [swapdev_vp].