From: Li Wang <liwang@redhat.com>
To: ltp@lists.linux.it
Subject: [LTP] [PATCH v4 3/3] syscalls/pipe2_03: Add new test for pipe2 O_DIRECT flag
Date: Thu, 23 Apr 2020 18:04:57 +0800 [thread overview]
Message-ID: <CAEemH2cF-kziNEHuN1GayTtzwdxFFzsu0wRGB85yJ=LaKS-XBw@mail.gmail.com> (raw)
In-Reply-To: <662aa817-04ff-e924-6880-7c23fa1cfe31@cn.fujitsu.com>
On Thu, Apr 23, 2020 at 4:45 PM Yang Xu <xuyang2018.jy@cn.fujitsu.com>
wrote:
> ...
> > I got a failure on the ppc64le platform(page size: 65536kB).
> >
> > # ./pipe2_03
> > tst_test.c:1246: INFO: Timeout per run is 0h 05m 00s
> > pipe_size = 1048576
> > PIPE_BUF = 4096
> > packet_num = 256
> > safe_macros.c:457: BROK: pipe2_03.c:58:
> > write(4,0x1001d2b8,18446744073709551615) failed: EAGAIN/EWOULDBLOCK (11)
> I think we should remove PIPE_BUF and use page_size because we use a
> page to store data not a fixed size buffer in kernel. as below(also,
> man-pages[1] is need to update):
>
Emm, If PIPE_BUF doesn't work correctly, shouldn't this a kernel pipe bug?
I think we need to take a close look at what happened there but not to
replace by using page_size directly.
--
Regards,
Li Wang
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next prev parent reply other threads:[~2020-04-23 10:04 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-22 10:45 [LTP] [PATCH v4 1/3] syscalls/pipe2_01: convert into new API Yang Xu
2020-04-22 10:45 ` [LTP] [PATCH v4 2/3] syscalls/pipe2_02: Add new test for pipe2 O_CLOEXEC flag Yang Xu
2020-04-22 10:45 ` [LTP] [PATCH v4 3/3] syscalls/pipe2_03: Add new test for pipe2 O_DIRECT flag Yang Xu
2020-04-23 8:08 ` Li Wang
2020-04-23 8:45 ` Yang Xu
2020-04-23 10:04 ` Li Wang [this message]
2020-04-23 10:30 ` Yang Xu
2020-04-26 11:59 ` Li Wang
2020-04-26 17:45 ` Linus Torvalds
2020-04-26 17:45 ` Linus Torvalds
2020-04-30 3:23 ` Yang Xu
2020-04-30 3:23 ` Yang Xu
2020-04-30 6:57 ` Li Wang
2020-04-26 9:31 ` [LTP] [PATCH v4 1/3] syscalls/pipe2_01: convert into new API Li Wang
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