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From: "Mike Snitzer" <>
To: NeilBrown <>
Cc: "Andrew Morton" <>,,
Subject: Re: [PATCH 003 of 3] md: Update md bitmap during resync.
Date: Mon, 10 Dec 2007 15:04:14 -0500	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

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On Dec 7, 2007 12:42 AM, NeilBrown <> wrote:
> Currently and md array with a write-intent bitmap does not updated
> that bitmap to reflect successful partial resync.  Rather the entire
> bitmap is updated when the resync completes.
> This is because there is no guarentee that resync requests will
> complete in order, and tracking each request individually is
> unnecessarily burdensome.
> However there is value in regularly updating the bitmap, so add code
> to periodically pause while all pending sync requests complete, then
> update the bitmap.  Doing this only every few seconds (the same as the
> bitmap update time) does not notciably affect resync performance.
> Signed-off-by: Neil Brown <>

Hi Neil,

You forgot to export bitmap_cond_end_sync.  Please see the attached patch.


[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: export_bitmap_cond_end_sync.patch --]
[-- Type: text/x-patch; name=export_bitmap_cond_end_sync.patch, Size: 330 bytes --]

diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index f31ea4f..b596538 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -1566,3 +1566,4 @@ EXPORT_SYMBOL(bitmap_start_sync);

      reply	other threads:[~2007-12-10 20:04 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-12-07  5:41 [PATCH 000 of 3] md: a few little patches NeilBrown
2007-12-07  5:41 ` [PATCH 001 of 3] md: raid6: Fix mktable.c NeilBrown
2007-12-07  5:41 ` [PATCH 002 of 3] md: raid6: clean up the style of raid6test/test.c NeilBrown
2007-12-07  5:42 ` [PATCH 003 of 3] md: Update md bitmap during resync NeilBrown
2007-12-10 20:04   ` Mike Snitzer [this message]

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