Re: [PATCH 00/17] VFS: Filesystem information and notifications [ver #17]
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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2020-03-03 13:14:40
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linux-fsdevel, lkml
On Tue, Mar 03, 2020 at 02:03:47PM +0100, Greg Kroah-Hartman wrote:
On Tue, Mar 03, 2020 at 12:38:14PM +0100, Karel Zak wrote:quoted
On Tue, Mar 03, 2020 at 10:26:21AM +0100, Miklos Szeredi wrote:quoted
No, I don't think this is going to be a performance issue at all, but if anything we could introduce a syscall ssize_t readfile(int dfd, const char *path, char *buf, size_t bufsize, int flags);off-topic, but I'll buy you many many beers if you implement it ;-), because open + read + close is pretty common for /sys and /proc in many userspace tools; for example ps, top, lsblk, lsmem, lsns, udevd etc. is all about it.Unlimited beers for a 21-line kernel patch? Sign me up! Totally untested, barely compiled patch below.
Ok, that didn't even build, let me try this for real now...