lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Sun, 5 Jul 2020 03:16:31 +0100
From:   Matthew Wilcox <>
To:     Jan Ziak <>
Subject: Re: [PATCH 0/3] readfile(2): a new syscall to make open/read/close

On Sun, Jul 05, 2020 at 04:06:22AM +0200, Jan Ziak wrote:
> Hello
> At first, I thought that the proposed system call is capable of
> reading *multiple* small files using a single system call - which
> would help increase HDD/SSD queue utilization and increase IOPS (I/O
> operations per second) - but that isn't the case and the proposed
> system call can read just a single file.
> Without the ability to read multiple small files using a single system
> call, it is impossible to increase IOPS (unless an application is
> using multiple reader threads or somehow instructs the kernel to
> prefetch multiple files into memory).

What API would you use for this?

ssize_t readfiles(int dfd, char **files, void **bufs, size_t *lens);

I pretty much hate this interface, so I hope you have something better
in mind.

Powered by blists - more mailing lists