BackPup/Linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-09-15 15:01:08 -04:00
Code Issues Packages Projects Releases Wiki Activity

[IA64] - Avoid slow TLB purges on SGI Altix systems

Browse Source 
flush_tlb_all() can be a scaling issue on large SGI Altix systems
since it uses the global call_lock and always executes on all cpus.
When a process enters flush_tlb_range() to purge TLBs for another
process, it is possible to avoid flush_tlb_all() and instead allow
sn2_global_tlb_purge() to purge TLBs only where necessary.

This patch modifies flush_tlb_range() so that this case can be handled
by platform TLB purge functions and updates ia64_global_tlb_purge()
accordingly.  sn2_global_tlb_purge() now calculates the region register
value from the mm argument introduced with this patch.

Signed-off-by: Dean Roe <roe@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Dean Roe
2005-10-27 15:41:04 -05:00
committed by Tony Luck
parent 72ab373a56
commit c1902aae32
3 changed files with 29 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/asm-ia64/machvec.h
View File

@@ -26,7 +26,7 @@ typedef void ia64_mv_cpu_init_t (void);
typedef void ia64_mv_irq_init_t (void);
typedef void ia64_mv_send_ipi_t (int, int, int, int);
typedef void ia64_mv_timer_interrupt_t (int, void *, struct pt_regs *);
typedef void ia64_mv_global_tlb_purge_t (unsigned long, unsigned long, unsigned long);
typedef void ia64_mv_global_tlb_purge_t (struct mm_struct *, unsigned long, unsigned long, unsigned long);
typedef void ia64_mv_tlb_migrate_finish_t (struct mm_struct *);
typedef unsigned int ia64_mv_local_vector_to_irq (u8);
typedef char *ia64_mv_pci_get_legacy_mem_t (struct pci_bus *);