On Thu, 24 Mar 2005 14:49:55 -0800 (PST)
Christoph Lameter <[email protected]> wrote:
> Could you help me fix up this patch replacing the old clear_pages patch?
Ok, first you need to mark the order and gfp arguments as unsigned
for mm/page_alloc.c:prep_zero_page() so that it matches the prototype
you added to include/linux/gfp.h else the compiler warns a lot.
Next, in the same function in mm/page_alloc.c, "PageHighmem()" is typo'd, it should be
"PageHighMem()".
The clear_cold() call on the next line needs a semicolon.
Erm... were any of your test builds done with the new CONFIG_CLEAR_COLD
option enabled? :-)
Next, replace your arch/sparc64/lib/clear_page.S diff with this one and
things would be working and we'll be using the proper temporal vs.
non-temporal stores on that platform.
===== arch/sparc64/lib/clear_page.S 1.1 vs edited =====
--- 1.1/arch/sparc64/lib/clear_page.S 2004-08-08 19:54:07 -07:00
+++ edited/arch/sparc64/lib/clear_page.S 2005-03-24 15:56:33 -08:00
@@ -72,26 +72,34 @@
mov 1, %o4
clear_page_common:
- VISEntryHalf
membar #StoreLoad | #StoreStore | #LoadStore
- fzero %f0
sethi %hi(PAGE_SIZE/64), %o1
mov %o0, %g1 ! remember vaddr for tlbflush
- fzero %f2
or %o1, %lo(PAGE_SIZE/64), %o1
- faddd %f0, %f2, %f4
- fmuld %f0, %f2, %f6
- faddd %f0, %f2, %f8
- fmuld %f0, %f2, %f10
- faddd %f0, %f2, %f12
- fmuld %f0, %f2, %f14
-1: stda %f0, [%o0 + %g0] ASI_BLK_P
+#define PREFETCH(x, y) prefetch x, y
+#define PREFETCH_CODE 2
+
+ PREFETCH([%o0 + 0x000], PREFETCH_CODE)
+ PREFETCH([%o0 + 0x040], PREFETCH_CODE)
+ PREFETCH([%o0 + 0x080], PREFETCH_CODE)
+ PREFETCH([%o0 + 0x0c0], PREFETCH_CODE)
+ PREFETCH([%o0 + 0x100], PREFETCH_CODE)
+ PREFETCH([%o0 + 0x140], PREFETCH_CODE)
+ PREFETCH([%o0 + 0x180], PREFETCH_CODE)
+1:
+ stx %g0, [%o0 + 0x00]
+ stx %g0, [%o0 + 0x08]
+ stx %g0, [%o0 + 0x10]
+ stx %g0, [%o0 + 0x18]
+ stx %g0, [%o0 + 0x20]
+ stx %g0, [%o0 + 0x28]
+ stx %g0, [%o0 + 0x30]
+ stx %g0, [%o0 + 0x38]
+ PREFETCH([%o0 + 0x1c0], PREFETCH_CODE)
subcc %o1, 1, %o1
bne,pt %icc, 1b
add %o0, 0x40, %o0
- membar #Sync
- VISExitHalf
brz,pn %o4, out
nop
@@ -101,5 +109,32 @@
stw %o2, [%g6 + TI_PRE_COUNT]
out: retl
+ nop
+
+ .globl clear_cold
+clear_cold: /* %o0=dest, %o1=order */
+ sethi %hi(PAGE_SIZE/64), %o2
+ clr %o4
+ or %o2, %lo(PAGE_SIZE/64), %o2
+ sllx %o2, %o1, %o1
+ VISEntryHalf
+ membar #StoreLoad | #StoreStore | #LoadStore
+ fzero %f0
+ fzero %f2
+ faddd %f0, %f2, %f4
+ fmuld %f0, %f2, %f6
+ faddd %f0, %f2, %f8
+ fmuld %f0, %f2, %f10
+
+ faddd %f0, %f2, %f12
+ fmuld %f0, %f2, %f14
+2: stda %f0, [%o0 + %g0] ASI_BLK_P
+ subcc %o1, 1, %o1
+ bne,pt %icc, 2b
+ add %o0, 0x40, %o0
+ membar #Sync
+ VISExitHalf
+
+ retl
nop
-
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