From: Eric Wong <e@80x24.org>
To: yahns-public@yhbt.net
Subject: Re: [PATCH 2/2] wbuf: avoid corrupted large responses with zero-copy sendfile
Date: Sat, 7 Mar 2015 21:36:44 +0000 [thread overview]
Message-ID: <20150307213644.GA26034@dcvr.yhbt.net> (raw)
In-Reply-To: <1405540640-10669-3-git-send-email-e@80x24.org>
Eric Wong <e@80x24.org> wrote:
> This bug is noticeable on a amd64 FreeBSD 9.2 VM, and possible under
> Linux, too. This happens as a zero-copy sendfile implementation means
> pages queued for transmission by the sendfile system call should not be
> modified at any point after the sendfile syscall is made.
Btw, this gotcha is now noted in the Linux sendfile(2) manpage:
http://git.kernel.org/cgit/docs/man-pages/man-pages.git/commit/man2/sendfile.2?id=7b6a3299776b5c1c4f169a591434a855d50c68b4
prev parent reply other threads:[~2015-03-07 21:36 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-16 19:57 [PATCH 0/2] FreeBSD-related fixes (affects Linux users, too) Eric Wong
2014-07-16 19:57 ` [PATCH 1/2] test_server: avoid multiple workers for dead parent check Eric Wong
2014-07-16 19:57 ` [PATCH 2/2] wbuf: avoid corrupted large responses with zero-copy sendfile Eric Wong
2015-03-07 21:36 ` Eric Wong [this message]
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