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Red Hat Bugzilla – Attachment 289911 Details for
Bug 253337
AIO not shown by iostat, top, etc.
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[patch]
Only account io_wait time if waiting for events
linux-2.6-aio-updated-io-schedule.patch (text/plain), 474 bytes, created by
Jeff Moyer
on 2007-12-18 18:17:07 UTC
(
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Description:
Only account io_wait time if waiting for events
Filename:
MIME Type:
Creator:
Jeff Moyer
Created:
2007-12-18 18:17:07 UTC
Size:
474 bytes
patch
obsolete
>--- linux-2.6.18.x86_64/fs/aio.c.orig 2007-12-18 10:47:58.000000000 -0500 >+++ linux-2.6.18.x86_64/fs/aio.c 2007-12-18 10:48:00.000000000 -0500 >@@ -1176,7 +1176,12 @@ > ret = 0; > if (to.timed_out) /* Only check after read evt */ > break; >- io_schedule(); >+ /* Try to only show up in io wait if there are ops >+ * in flight */ >+ if (ctx->reqs_active) >+ io_schedule(); >+ else >+ schedule(); > if (signal_pending(tsk)) { > ret = -EINTR; > break;
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