Messages in this thread | | | Date | Sat, 1 May 2004 14:39:55 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH][2.6-mm] Allow i386 to reenable interrupts on lock contention |
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Zwane Mwaikambo <zwane@linuxpower.ca> wrote: > > + #define spin_lock_string_flags \ > + "\n1:\t" \ > + "lock ; decb %0\n\t" \ > + "jns 4f\n" \ > + "testl $0x200, %1\n\t" \ > + "jz 2f\n\t" \ > + "sti\n\t" \ > + "jmp 2f\n\t" \ > + LOCK_SECTION_START("") \ > + "2:\t" \ > + "rep;nop\n\t" \ > + "cmpb $0, %0\n\t" \ > + "jle 2b\n\t" \ > + "jmp 3f\n\t" \ > + LOCK_SECTION_END \ > + "3:\t" \ > + "cli\n\t" \ > + "jmp 1b\n" \ > + "4:\t"
Could we move all the irq-handling stuff into the out-of-line section, to keep the fast-path cache footprint smaller?
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