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Message-ID: <20051121213913.61220.qmail@web34115.mail.mud.yahoo.com>
Date: Mon, 21 Nov 2005 13:39:12 -0800 (PST)
From: Kenny Simpson <theonetruekenny@yahoo.com>
Subject: Re: infinite loop? with mmap, nfs, pwrite, O_DIRECT
To: Andrew Morton <akpm@osdl.org>
Cc: cel@citi.umich.edu, trond.myklebust@fys.uio.no,
       linux-kernel@vger.kernel.org
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With gentle beating by a clue-stick from Andrew.. I can run the same test on ext3...

ext3 is happy...

open("/data/foo", O_RDWR|O_CREAT|O_TRUNC|O_DIRECT|O_LARGEFILE, 0666) = 3
pwrite(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096, 4299161600) = 4096
mmap2(NULL, 2097152, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0x100200) = 0xb7c7f000
pwrite(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096, 4301258752) = 4096
exit_group(0)                           = ?


but NFS is still unhappy....

open("/mnt/bar", O_RDWR|O_CREAT|O_TRUNC|O_DIRECT|O_LARGEFILE, 0666) = 3
pwrite(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096, 4299161600) = 4096
mmap2(NULL, 2097152, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0x100200) = 0xb7bc2000
pwrite(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096, 4301258752  <never
returns>


-Kenny



	
		
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