From: Blaisorblade <blaisorblade@yahoo.it>
To: user-mode-linux-devel@lists.sourceforge.net
Cc: Jeff Dike <jdike@addtoit.com>, Allan Graves <allan.graves@oracle.com>
Subject: Re: [uml-devel] Clarification of UML and AIO?
Date: Wed, 13 Jul 2005 15:39:24 +0200 [thread overview]
Message-ID: <200507131539.25266.blaisorblade@yahoo.it> (raw)
In-Reply-To: <20050712220327.GB4469@ccure.user-mode-linux.org>
On Wednesday 13 July 2005 00:03, Jeff Dike wrote:
> > Tracing the aio_read() through the UML kernel finally gets me here:
> >
> > #0 sys_pread64 (fd=3, buf=0xbf7c8f20 "", count=1024, pos=0)
> > at fs/read_write.c:354
> > #1 0x08062ff8 in execute_syscall_skas (r=0x12374864)
> > at arch/um/kernel/skas/syscall_kern.c:29
> Finally? That's the very beginning of the system call (or the very end).
> The UML block device doesn't know about AIO. All it does is get blocks
> from a disk.
> Are you sure you're getting kernel AIO and not the libc emulation of it?
This is a good answer.... strace will be your friend in verifying this.
--
Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!".
Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894)
http://www.user-mode-linux.org/~blaisorblade
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next prev parent reply other threads:[~2005-07-13 13:32 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-12 20:57 [uml-devel] Clarification of UML and AIO? Allan Graves
2005-07-12 22:03 ` Jeff Dike
2005-07-13 13:39 ` Blaisorblade [this message]
2005-07-13 17:57 ` Allan Graves
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