LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Jens Axboe <jens.axboe@oracle.com>
To: linux-kernel@vger.kernel.org
Cc: Alan.Brunelle@hp.com, arjan@linux.intel.com, dgc@sgi.com,
	npiggin@suse.de, Jens Axboe <jens.axboe@oracle.com>
Subject: [PATCH 6/8] ia64: add support for remotely triggering the block softirq
Date: Thu,  7 Feb 2008 10:19:03 +0100	[thread overview]
Message-ID: <1202375945-29525-7-git-send-email-jens.axboe@oracle.com> (raw)
In-Reply-To: <1202375945-29525-1-git-send-email-jens.axboe@oracle.com>

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
---
 arch/ia64/kernel/smp.c |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/arch/ia64/kernel/smp.c b/arch/ia64/kernel/smp.c
index 4e446aa..96f8ffa 100644
--- a/arch/ia64/kernel/smp.c
+++ b/arch/ia64/kernel/smp.c
@@ -80,6 +80,7 @@ static volatile struct call_data_struct *call_data;
 #define IPI_CALL_FUNC		0
 #define IPI_CPU_STOP		1
 #define IPI_KDUMP_CPU_STOP	3
+#define IPI_BLOCK_SOFTIRQ	4
 
 /* This needs to be cacheline aligned because it is written to by *other* CPUs.  */
 static DEFINE_PER_CPU_SHARED_ALIGNED(u64, ipi_operation);
@@ -174,6 +175,14 @@ handle_IPI (int irq, void *dev_id)
 				unw_init_running(kdump_cpu_freeze, NULL);
 				break;
 #endif
+			      case IPI_BLOCK_SOFTIRQ: {
+				unsigned long flags;
+
+				local_irq_save(flags);
+				raise_softirq_irqoff(BLOCK_SOFTIRQ);
+				local_irq_restore(flags);
+				break;
+			      }
 			      default:
 				printk(KERN_CRIT "Unknown IPI on CPU %d: %lu\n", this_cpu, which);
 				break;
@@ -461,6 +470,11 @@ smp_call_function (void (*func) (void *info), void *info, int nonatomic, int wai
 }
 EXPORT_SYMBOL(smp_call_function);
 
+void arch_raise_softirq_on_cpu(int cpuid)
+{
+	send_IPI_single(cpuid, IPI_BLOCK_SOFTIRQ);
+}
+
 /*
  * this function calls the 'stop' function on all other CPUs in the system.
  */
-- 
1.5.4.22.g7a20


  parent reply	other threads:[~2008-02-07  9:22 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-07  9:18 [PATCH 0/8] IO queuing and complete affinity Jens Axboe
2008-02-07  9:18 ` [PATCH 1/8] block: split softirq handling into blk-softirq.c Jens Axboe
2008-02-07  9:18 ` [PATCH 2/8] Add interface for queuing work on a specific CPU Jens Axboe
2008-02-07  9:45   ` Andrew Morton
2008-02-07  9:49     ` Jens Axboe
2008-02-07 17:44       ` Harvey Harrison
2008-02-11 10:51     ` Oleg Nesterov
2008-02-07  9:19 ` [PATCH 3/8] block: make kblockd_schedule_work() take the queue as parameter Jens Axboe
2008-02-07  9:19 ` [PATCH 4/8] x86: add support for remotely triggering the block softirq Jens Axboe
2008-02-07 10:07   ` Ingo Molnar
2008-02-07 10:17     ` Jens Axboe
2008-02-07 10:25       ` Ingo Molnar
2008-02-07 10:31         ` Jens Axboe
2008-02-07 10:38           ` Ingo Molnar
2008-02-07 14:18             ` Jens Axboe
2008-02-07 10:49           ` [patch] block layer: kmemcheck fixes Ingo Molnar
2008-02-07 17:42             ` Linus Torvalds
2008-02-07 17:55               ` Jens Axboe
2008-02-07 19:31               ` Ingo Molnar
2008-02-07 20:06                 ` Jens Axboe
2008-02-08  1:22               ` David Miller
2008-02-08  1:28                 ` Linus Torvalds
2008-02-08 15:09                 ` Arjan van de Ven
2008-02-08 22:44                   ` Nick Piggin
2008-02-08 22:56                     ` Arjan van de Ven
2008-02-08 23:58                       ` Nick Piggin
2008-02-08 11:38               ` Jens Axboe
2008-02-07  9:19 ` [PATCH 5/8] x86-64: add support for remotely triggering the block softirq Jens Axboe
2008-02-07  9:19 ` Jens Axboe [this message]
2008-02-07  9:19 ` [PATCH 7/8] kernel: add generic softirq interface for triggering a remote softirq Jens Axboe
2008-02-07  9:19 ` [PATCH 8/8] block: add test code for testing CPU affinity Jens Axboe
2008-02-07 15:16 ` [PATCH 0/8] IO queuing and complete affinity Alan D. Brunelle
2008-02-07 18:25 ` IO queuing and complete affinity with threads (was Re: [PATCH 0/8] IO queuing and complete affinity) Jens Axboe
2008-02-07 20:40   ` Alan D. Brunelle
2008-02-08  7:38   ` Nick Piggin
2008-02-08  7:47     ` Jens Axboe
2008-02-08  7:53       ` Nick Piggin
2008-02-08  7:59         ` Jens Axboe
2008-02-08  8:12           ` Nick Piggin
2008-02-08  8:24             ` Jens Axboe
2008-02-08  8:33               ` Nick Piggin
2008-02-11  5:22           ` David Chinner
2008-02-12  8:28             ` Jeremy Higdon

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1202375945-29525-7-git-send-email-jens.axboe@oracle.com \
    --to=jens.axboe@oracle.com \
    --cc=Alan.Brunelle@hp.com \
    --cc=arjan@linux.intel.com \
    --cc=dgc@sgi.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=npiggin@suse.de \
    --subject='Re: [PATCH 6/8] ia64: add support for remotely triggering the block softirq' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).