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Initialize b_vnbuf.le_next before returning a new buffer in getpbuf and 

trypbuf. Move a couple of splbio's to be slightly less conservative.
This commit is contained in:
David Greenman 1994-12-23 04:56:51 +00:00
parent 602d2b481a
commit 7609ab12e4
2 changed files with 8 additions and 4 deletions
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8
sys/vm/swap_pager.c
View File

@ -39,7 +39,7 @@
* from: Utah $Hdr: swap_pager.c 1.4 91/04/30$
*
* @(#)swap_pager.c 8.9 (Berkeley) 3/21/94
* $Id: swap_pager.c,v 1.19 1994/12/19 00:02:54 davidg Exp $
* $Id: swap_pager.c,v 1.20 1994/12/22 05:18:12 davidg Exp $
*/
/*
@ -1020,6 +1020,7 @@ swap_pager_input(swp, m, count, reqpage)
bp = spc->spc_bp;
bzero(bp, sizeof *bp);
bp->b_spc = spc;
bp->b_vnbufs.le_next = NOLIST;
} else {
/*
* Get a swap buffer header to perform the IO
@ -1033,7 +1034,6 @@ swap_pager_input(swp, m, count, reqpage)
*/
pmap_qenter( kva, m, count);
s = splbio();
bp->b_flags = B_BUSY | B_READ | B_CALL;
bp->b_iodone = swap_pager_iodone1;
bp->b_proc = &proc0; /* XXX (but without B_PHYS set this is ok) */
@ -1059,6 +1059,7 @@ swap_pager_input(swp, m, count, reqpage)
/*
* wait for the sync I/O to complete
*/
s = splbio();
while ((bp->b_flags & B_DONE) == 0) {
tsleep((caddr_t)bp, PVM, "swread", 0);
}
@ -1388,13 +1389,13 @@ retrygetspace:
--swb[i]->swb_locked;
}
s = splbio();
/*
* Get a swap buffer header and perform the IO
*/
bp = spc->spc_bp;
bzero(bp, sizeof *bp);
bp->b_spc = spc;
bp->b_vnbufs.le_next = NOLIST;
bp->b_flags = B_BUSY;
bp->b_proc = &proc0; /* XXX (but without B_PHYS set this is ok) */
@ -1415,6 +1416,7 @@ retrygetspace:
* If this is an async write we set up additional buffer fields
* and place a "cleaning" entry on the inuse queue.
*/
s = splbio();
if ( flags & B_ASYNC ) {
spc->spc_flags = 0;
spc->spc_swp = swp;

4
sys/vm/vm_pager.c
View File

@ -61,7 +61,7 @@
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*
* $Id: vm_pager.c,v 1.8 1994/10/09 01:52:16 phk Exp $
* $Id: vm_pager.c,v 1.9 1994/12/19 00:02:56 davidg Exp $
*/
/*
@ -363,6 +363,7 @@ getpbuf() {
bp->b_rcred = NOCRED;
bp->b_wcred = NOCRED;
bp->b_data = (caddr_t) (MAXPHYS * (bp-swbuf)) + swapbkva;
bp->b_vnbufs.le_next = NOLIST;
return bp;
}
@ -386,6 +387,7 @@ trypbuf() {
bp->b_rcred = NOCRED;
bp->b_wcred = NOCRED;
bp->b_data = (caddr_t) (MAXPHYS * (bp-swbuf)) + swapbkva;
bp->b_vnbufs.le_next = NOLIST;
return bp;
}