From: Andi Kleen <andi@firstfloor.org>
To: Mikulas Patocka <mpatocka@redhat.com>
Cc: sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org,
Jens Axboe <jens.axboe@oracle.com>
Subject: Re: [SUGGESTION]: drop virtual merge accounting in I/O requests
Date: Sat, 12 Jul 2008 12:30:04 +0000 [thread overview]
Message-ID: <87iqvb2skz.fsf@basil.nowhere.org> (raw)
In-Reply-To: <Pine.LNX.4.64.0807101702090.19775@engineering.redhat.com> (Mikulas Patocka's message of "Thu, 10 Jul 2008 17:56:08 -0400 (EDT)")
Mikulas Patocka <mpatocka@redhat.com> writes:
> I'm getting crashes with InitIO A100u2w controller on Sparc64 (I had
> to fix the endianity issues in the driver, but that's unrelated).
x86-64 (and powerpc) solved this a long time ago by only doing
opportunistic merging: as in don't announce to the block layer
that you can merge, but try to merge anyways. This way SG lists
are not necessarily filled completely, but it's still better
than overflowing them in some rare cases.
-Andi
WARNING: multiple messages have this Message-ID (diff)
From: Andi Kleen <andi@firstfloor.org>
To: Mikulas Patocka <mpatocka@redhat.com>
Cc: sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org,
Jens Axboe <jens.axboe@oracle.com>
Subject: Re: [SUGGESTION]: drop virtual merge accounting in I/O requests
Date: Sat, 12 Jul 2008 14:30:04 +0200 [thread overview]
Message-ID: <87iqvb2skz.fsf@basil.nowhere.org> (raw)
In-Reply-To: <Pine.LNX.4.64.0807101702090.19775@engineering.redhat.com> (Mikulas Patocka's message of "Thu, 10 Jul 2008 17:56:08 -0400 (EDT)")
Mikulas Patocka <mpatocka@redhat.com> writes:
> I'm getting crashes with InitIO A100u2w controller on Sparc64 (I had
> to fix the endianity issues in the driver, but that's unrelated).
x86-64 (and powerpc) solved this a long time ago by only doing
opportunistic merging: as in don't announce to the block layer
that you can merge, but try to merge anyways. This way SG lists
are not necessarily filled completely, but it's still better
than overflowing them in some rare cases.
-Andi
next prev parent reply other threads:[~2008-07-12 12:30 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-10 21:56 [SUGGESTION]: drop virtual merge accounting in I/O requests Mikulas Patocka
2008-07-10 21:56 ` Mikulas Patocka
2008-07-10 22:59 ` Julian Calaby
2008-07-10 22:59 ` Julian Calaby
2008-07-10 23:57 ` Mikulas Patocka
2008-07-10 23:57 ` Mikulas Patocka
2008-07-11 6:20 ` FUJITA Tomonori
2008-07-11 6:20 ` FUJITA Tomonori
2008-07-11 10:52 ` Mikulas Patocka
2008-07-11 10:52 ` Mikulas Patocka
2008-07-11 11:15 ` FUJITA Tomonori
2008-07-11 11:15 ` FUJITA Tomonori
2008-07-11 19:41 ` David Miller
2008-07-11 19:41 ` David Miller
2008-07-11 20:22 ` Mikulas Patocka
2008-07-11 20:22 ` Mikulas Patocka
2008-07-12 12:30 ` Andi Kleen [this message]
2008-07-12 12:30 ` Andi Kleen
2008-07-13 13:34 ` Mikulas Patocka
2008-07-13 13:34 ` Mikulas Patocka
2008-07-13 13:50 ` Andi Kleen
2008-07-13 13:50 ` Andi Kleen
2008-07-13 19:46 ` David Miller
2008-07-13 19:46 ` David Miller
2008-07-13 20:13 ` Andi Kleen
2008-07-13 20:13 ` Andi Kleen
2008-07-13 23:53 ` Mikulas Patocka
2008-07-13 23:53 ` Mikulas Patocka
2008-07-14 0:48 ` David Miller
2008-07-14 0:48 ` David Miller
2008-07-14 12:16 ` Mikulas Patocka
2008-07-14 12:16 ` Mikulas Patocka
2008-07-14 12:28 ` David Miller
2008-07-14 12:28 ` David Miller
2008-07-14 14:03 ` Mikulas Patocka
2008-07-14 14:03 ` Mikulas Patocka
2008-07-14 21:37 ` David Miller
2008-07-14 21:37 ` David Miller
2008-07-14 23:16 ` Mikulas Patocka
2008-07-14 23:16 ` Mikulas Patocka
2008-07-15 1:31 ` David Miller
2008-07-15 1:31 ` David Miller
2008-07-15 22:32 ` Mikulas Patocka
2008-07-15 22:32 ` Mikulas Patocka
2008-07-15 22:37 ` David Miller
2008-07-15 22:37 ` David Miller
2008-07-15 22:59 ` Mikulas Patocka
2008-07-15 22:59 ` Mikulas Patocka
2008-07-15 2:40 ` FUJITA Tomonori
2008-07-15 2:40 ` FUJITA Tomonori
2008-07-14 0:41 ` David Miller
2008-07-14 0:41 ` David Miller
2008-07-14 2:19 ` FUJITA Tomonori
2008-07-14 2:19 ` FUJITA Tomonori
2008-07-14 3:20 ` David Miller
2008-07-14 3:20 ` David Miller
2008-07-14 17:45 ` FUJITA Tomonori
2008-07-14 17:45 ` FUJITA Tomonori
2008-07-14 21:26 ` Mikulas Patocka
2008-07-14 21:26 ` Mikulas Patocka
2008-07-15 2:40 ` FUJITA Tomonori
2008-07-15 2:40 ` FUJITA Tomonori
2008-07-15 12:09 ` Mikulas Patocka
2008-07-15 12:09 ` Mikulas Patocka
2008-07-15 12:15 ` Andi Kleen
2008-07-15 12:15 ` Andi Kleen
2008-07-15 13:16 ` Mikulas Patocka
2008-07-15 13:16 ` Mikulas Patocka
2008-07-15 14:06 ` Andi Kleen
2008-07-15 14:06 ` Andi Kleen
2008-07-15 12:19 ` FUJITA Tomonori
2008-07-15 12:19 ` FUJITA Tomonori
2008-07-16 3:10 ` David Miller
2008-07-16 3:10 ` David Miller
2008-07-16 4:38 ` FUJITA Tomonori
2008-07-16 4:38 ` FUJITA Tomonori
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