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SubjectRe: [RFC PATCH 0/2] dirreadahead system call
On Fri, Jul 25, 2014 at 7:37 PM, Abhi Das <adas@redhat.com> wrote:
> This system call takes 3 arguments:
> fd - file descriptor of the directory being readahead
> *offset - offset in dir from which to resume. This is updated
> as we move along in the directory
> count - The max number of entries to readahead
>
> The syscall is supposed to read upto 'count' entries starting at
> '*offset' and cache the inodes corresponding to those entries. It
> returns a negative error code or a positive number indicating
> the number of inodes it has issued readaheads for. It also
> updates the '*offset' value so that repeated calls to dirreadahead
> can resume at the right location. Returns 0 when there are no more
> entries left.

Hello Abhi,

As per Documentation/SubmitChecklist, please CC linux-api on patches
that change the kerne-user-space API/ABI. (See
https://www.kernel.org/doc/man-pages/linux-api-ml.html for more
details.)

Cheers,

Michael


> Abhi Das (2):
> fs: Add dirreadahead syscall and VFS hooks
> gfs2: GFS2's implementation of the dir_readahead file operation
>
> arch/x86/syscalls/syscall_32.tbl | 1 +
> arch/x86/syscalls/syscall_64.tbl | 1 +
> fs/gfs2/Makefile | 3 +-
> fs/gfs2/dir.c | 49 ++++++---
> fs/gfs2/dir.h | 15 +++
> fs/gfs2/dir_readahead.c | 209 +++++++++++++++++++++++++++++++++++++++
> fs/gfs2/file.c | 2 +
> fs/gfs2/main.c | 10 +-
> fs/gfs2/super.c | 1 +
> fs/readdir.c | 49 +++++++++
> include/linux/fs.h | 3 +
> 11 files changed, 328 insertions(+), 15 deletions(-)
> create mode 100644 fs/gfs2/dir_readahead.c
>
> --
> 1.8.1.4
>
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--
Michael Kerrisk Linux man-pages maintainer;
http://www.kernel.org/doc/man-pages/
Author of "The Linux Programming Interface", http://blog.man7.org/


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