* [d-kernel] Про wks26
@ 2005-01-27 14:47 Alex Yustasov
0 siblings, 0 replies; only message in thread
From: Alex Yustasov @ 2005-01-27 14:47 UTC (permalink / raw)
To: devel-kernel, lakostis
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Здравствуйте.
У меня wks26 падало при resume. Виноват был
2.6_98_sched-fix-scheduling-latencies-in-mttrc.patch
из lowlatency.
Я его поменял немножно. Вместо spin_lock_irq и spin_unclock_irq
поставил spin_lock_irqsave и spin_unlock_irqrestore. (в аттаче)
С ним работает.
Заливать в cvs?
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diff -puN arch/i386/kernel/cpu/mtrr/generic.c~sched-fix-scheduling-latencies-in-mttrc arch/i386/kernel/cpu/mtrr/generic.c
--- 25/arch/i386/kernel/cpu/mtrr/generic.c~sched-fix-scheduling-latencies-in-mttrc Tue Sep 14 17:42:08 2004
+++ 25-akpm/arch/i386/kernel/cpu/mtrr/generic.c Tue Sep 14 17:42:08 2004
@@ -240,11 +240,9 @@
/* Note that this is not ideal, since the cache is only flushed/disabled
for this CPU while the MTRRs are changed, but changing this requires
more invasive changes to the way the kernel boots */
- spin_lock(&set_atomicity_lock);
/* Enter the no-fill (CD=1, NW=0) cache mode and flush caches. */
cr0 = read_cr0() | 0x40000000; /* set CD flag */
- wbinvd();
write_cr0(cr0);
wbinvd();
@@ -266,8 +264,7 @@
static void post_set(void)
{
- /* Flush caches and TLBs */
- wbinvd();
+ /* Flush TLBs (no need to flush caches - they are disabled) */
__flush_tlb();
/* Intel (P6) standard MTRRs */
@@ -279,12 +276,17 @@
/* Restore value of CR4 */
if ( cpu_has_pge )
write_cr4(cr4);
- spin_unlock(&set_atomicity_lock);
}
static void generic_set_all(void)
{
- unsigned long mask, count;
+ unsigned long mask, count, flags;
+
+ /*
+ * Since we are disabling the cache dont allow any interrupts - they
+ * would run extremely slow and would only increase the pain:
+ */
+ spin_lock_irqsave(&set_atomicity_lock, flags);
prepare_set();
@@ -293,6 +295,8 @@
post_set();
+ spin_unlock_irqrestore(&set_atomicity_lock, flags);
+
/* Use the atomic bitops to update the global mask */
for (count = 0; count < sizeof mask * 8; ++count) {
if (mask & 0x01)
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2005-01-27 14:47 [d-kernel] Про wks26 Alex Yustasov
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