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bug#9500: [PATCH]: use posix_fallocate where supported

From: Pádraig Brady
Subject: bug#9500: [PATCH]: use posix_fallocate where supported
Date: Fri, 25 Nov 2011 10:59:09 +0000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:6.0) Gecko/20110816 Thunderbird/6.0

On 11/25/2011 10:13 AM, Pádraig Brady wrote:

> Hmm, one of your points above got me thinking.
> Might fallocate() fail to allocate an extent with ENOSPC,
> but there could be fragmented space available to write()?
> That would scupper benefit (2) above :(
> I'll ask address@hidden

And the response from there is that fallocate() will
check the free blocks first, and then try to allocate
as a contiguous extent, but that part is not guaranteed.
So we still get benefit (2).


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