Zou, Nanhai wrote: >> -----Original Message----- >> From: Jay Lan [mailto:[EMAIL PROTECTED] >> Sent: 2006A"ê10O^A^31E`O~ 4:36 >> To: fastboot >> Cc: Linux-IA64; Zou, Nanhai; Jack Steiner; Luck, Tony >> Subject: [PATCH]send slave cpus to SAL slave loop on crash (IA64) >> >> This patch is to fix a problem of interrupts being sent to cpus >> that can not respond. >> >> This patch would return slave cpus to SAL slave loop, at time of >> crash, except cpu0. The cpu0 is a special case as there is no way >> to return it to SAL, so cpu0 is better handled in firmware. >> >> Signed-off-by: Jay Lan <[EMAIL PROTECTED]> >> > > > Does this fix the I/O interrupt redirect issue on SN?
This fixes the interrupts being sent to cpus not in the slave loop that caused hang on SN. When one boots up the kexec'ed kernel with 'maxcpus=1', all idle cpus needs to be sent back. If they are not returned to the SAL slave loop and just looping in cpu_relax(), they are considered alive, but interrupts would be lost and system hang. This is different from the kexec '--noio' option you added to kexec-tools. We still need that fix. > However this patch will make Kdump depends on cpu hotplug code, so you may > add the dependency in Kconfig. I thought Kahalid Aziz's patch covered this? http://lists.osdl.org/mailman/htdig/fastboot/2006-October/004548.html Thanks, - jay > > Thanks > Zou Nan hai
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