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authorMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>2007-02-10 01:45:05 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-11 10:51:28 -0800
commit23c887522e912ca494950796a95df8dd210f4b01 (patch)
treeda8c244fd7fd7eef7a413ad8df2f19b32d4a7c52 /block/blktrace.c
parent138c5d258cf06c278f5d7fe0a806e50fe413a08f (diff)
downloadlinux-2.6.34-ux500-23c887522e912ca494950796a95df8dd210f4b01.tar.gz
[PATCH] Relay: add CPU hotplug support
Mathieu originally needed to add this for tracing Xen, but it's something that's needed for any application that can be tracing while cpus are added. unplug isn't supported by this patch. The thought was that at minumum a new buffer needs to be added when a cpu comes up, but it wasn't worth the effort to remove buffers on cpu down since they'd be freed soon anyway when the channel was closed. [zanussi@us.ibm.com: avoid lock_cpu_hotplug deadlock] Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Tom Zanussi <zanussi@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'block/blktrace.c')
-rw-r--r--block/blktrace.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/block/blktrace.c b/block/blktrace.c
index d3679dd1d22..d36b32ed22f 100644
--- a/block/blktrace.c
+++ b/block/blktrace.c
@@ -363,10 +363,9 @@ static int blk_trace_setup(request_queue_t *q, struct block_device *bdev,
if (!bt->dropped_file)
goto err;
- bt->rchan = relay_open("trace", dir, buts.buf_size, buts.buf_nr, &blk_relay_callbacks);
+ bt->rchan = relay_open("trace", dir, buts.buf_size, buts.buf_nr, &blk_relay_callbacks, bt);
if (!bt->rchan)
goto err;
- bt->rchan->private_data = bt;
bt->act_mask = buts.act_mask;
if (!bt->act_mask)