From: Matthew Wilcox <willy@infradead.org>
To: Wei Wang <wei.w.wang@intel.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>,
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Subject: Re: [Qemu-devel] [PATCH v20 0/7] Virtio-balloon Enhancement
Date: Thu, 21 Dec 2017 04:14:37 -0800 [thread overview]
Message-ID: <20171221121437.GA22405@bombadil.infradead.org> (raw)
In-Reply-To: <5A3B2148.8050306@intel.com>
On Thu, Dec 21, 2017 at 10:49:44AM +0800, Wei Wang wrote:
> On 12/21/2017 01:10 AM, Matthew Wilcox wrote:
> One more question is about the return value, why would it be ambiguous? I
> think it is the same as find_next_bit() which returns the found bit or size
> if not found.
Because find_next_bit doesn't reasonably support a bitmap which is
ULONG_MAX in size. The point of XBitmap is to support a bitmap which
is ULONG_MAX in size, so every possible return value is a legitimate
"we found a bit here". There's no value which can possibly be used for
"no bit was found".
next prev parent reply other threads:[~2017-12-21 12:14 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-19 12:17 [Qemu-devel] [PATCH v20 0/7] Virtio-balloon Enhancement Wei Wang
2017-12-19 12:17 ` [Qemu-devel] [PATCH v20 1/7] xbitmap: Introduce xbitmap Wei Wang
2017-12-19 15:58 ` Philippe Ombredanne
2017-12-19 12:17 ` [Qemu-devel] [PATCH v20 2/7] xbitmap: potential improvement Wei Wang
2017-12-19 12:17 ` [Qemu-devel] [PATCH v20 3/7] xbitmap: add more operations Wei Wang
2017-12-19 12:17 ` [Qemu-devel] [PATCH v20 4/7] virtio-balloon: VIRTIO_BALLOON_F_SG Wei Wang
2017-12-24 3:21 ` Matthew Wilcox
2017-12-24 4:45 ` Tetsuo Handa
2017-12-24 7:42 ` Wei Wang
2017-12-24 8:16 ` [Qemu-devel] [virtio-dev] " Wei Wang
2017-12-25 14:51 ` [Qemu-devel] " Tetsuo Handa
2017-12-26 3:06 ` Wei Wang
2017-12-26 10:38 ` Tetsuo Handa
2017-12-26 11:36 ` Wei Wang
2017-12-26 13:40 ` Tetsuo Handa
2018-01-02 13:24 ` Matthew Wilcox
2018-01-03 2:29 ` Tetsuo Handa
2018-01-03 9:00 ` Wei Wang
2018-01-03 10:19 ` Tetsuo Handa
2017-12-19 12:17 ` [Qemu-devel] [PATCH v20 5/7] mm: support reporting free page blocks Wei Wang
2017-12-19 12:17 ` [Qemu-devel] [PATCH v20 6/7] virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_VQ Wei Wang
2017-12-19 12:17 ` [Qemu-devel] [PATCH v20 7/7] virtio-balloon: don't report free pages when page poisoning is enabled Wei Wang
2017-12-19 14:05 ` [Qemu-devel] [PATCH v20 0/7] Virtio-balloon Enhancement Tetsuo Handa
2017-12-19 14:40 ` Matthew Wilcox
2017-12-20 2:33 ` Tetsuo Handa
2017-12-19 18:08 ` Michael S. Tsirkin
2017-12-20 10:34 ` Wei Wang
2017-12-20 12:25 ` Matthew Wilcox
2017-12-20 16:13 ` Wang, Wei W
2017-12-20 17:10 ` Matthew Wilcox
2017-12-21 2:49 ` Wei Wang
2017-12-21 12:14 ` Matthew Wilcox [this message]
2017-12-21 12:56 ` Tetsuo Handa
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