From: Andrew Morton <akpm@zip.com.au>
To: Dave Jones <davej@suse.de>, Linus Torvalds <torvalds@transmeta.com>
Cc: lkml <linux-kernel@vger.kernel.org>
Subject: [patch] fix loop deadlock
Date: Sat, 30 Mar 2002 21:31:31 -0800 [thread overview]
Message-ID: <3CA69F33.90B37E83@zip.com.au> (raw)
2.5 is missing a chunk from 2.4
--- 2.5.7/fs/buffer.c~loop-deadlock Sat Mar 30 21:18:13 2002
+++ 2.5.7-akpm/fs/buffer.c Sat Mar 30 21:18:22 2002
@@ -992,7 +992,7 @@ static int balance_dirty_state(void)
/* First, check for the "real" dirty limit. */
if (dirty > soft_dirty_limit) {
- if (dirty > hard_dirty_limit)
+ if (dirty > hard_dirty_limit && !(current->flags & PF_NOIO))
return 1;
return 0;
}
>From an efficiency POV loop is looking rather hilarious:
c013da84 kmem_cache_alloc 30 0.0355
c0239bc0 __make_request 41 0.0321
c02457e0 transfer_none 90 1.2500
c0148480 create_bounce 171 0.2007
c0138a00 generic_file_write 305 0.1540
c014d558 write_some_buffers 10028 28.4886
c0151db5 .text.lock.buffer 29229 47.2197
00000000 total 40308 0.0195
Probably we can fix this using the BH_Launder bit from
Andrea's kit.
-
reply other threads:[~2002-03-31 5:33 UTC|newest]
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