From 0e847864cef404f555387d7fcc97f7dbe769e1e9 Mon Sep 17 00:00:00 2001 From: Richard Braun Date: Fri, 3 May 2013 19:56:50 +0200 Subject: Handle notification on page eviction If requested by the user, make libpager call pager_notify_evict when a page is flushed out by the kernel. Based on work by Ognyan Kulev. * console/pager.c (pager_notify_evict): New function. (user_pager_create): Update call to pager_create. * ext2fs/pager.c: (pager_notify_evict): New function. (create_disk_pager): Update call to diskfs_start_disk_pager. (diskfs_get_filemap): Update call to pager_create. * fatfs/pager.c: (pager_notify_evict): New function. (create_fat_pager): Update call to diskfs_start_disk_pager. (diskfs_get_filemap): Update call to pager_create. * isofs/pager.c: (pager_notify_evict): New function. (create_disk_pager): Update call to diskfs_start_disk_pager. (diskfs_get_filemap): Update call to pager_create. * libdiskfs/disk-pager.c (diskfs_start_disk_pager): Update definition and call to pager_create. * libdiskfs/diskfs-pager.h (diskfs_start_disk_pager): Update declaration. * libpager/data-request.c (_pager_seqnos_memory_object_data_request): Take pager's `notify_on_evict' member into account when calling memory_object_data_supply. * libpager/data-return.c (_pager_do_write_request): Handle user notification on page flush. * libpager/pager-create.c (pager_create): Update definition and set pager's `notify_on_evict' member. * libpager/pager.h (pager_create): Update declaration. (pager_notify_evict): New declaration. * libpager/priv.h (struct pager): New `notify_on_evict' member. * storeio/pager.c: (pager_notify_evict): New function. (dev_get_memory_object): Update call to pager_create. * tmpfs/pager-stubs.c (pager_notify_evict): New function. * ufs/pager.c (pager_notify_evict): New function. (create_disk_pager): Update call to diskfs_start_disk_pager. (diskfs_get_filemap): Update call to pager_create. --- ufs/pager.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) (limited to 'ufs') diff --git a/ufs/pager.c b/ufs/pager.c index 1e3d140c..5d3e44ab 100644 --- a/ufs/pager.c +++ b/ufs/pager.c @@ -450,6 +450,13 @@ pager_unlock_page (struct user_pager_info *pager, return err; } +void +pager_notify_evict (struct user_pager_info *pager, + vm_offset_t page) +{ + assert (!"unrequested notification on eviction"); +} + /* Implement the pager_report_extent callback from the pager library. See for the interface description. */ inline error_t @@ -502,7 +509,7 @@ create_disk_pager (void) upi->type = DISK; upi->np = 0; pager_bucket = ports_create_bucket (); - diskfs_start_disk_pager (upi, pager_bucket, MAY_CACHE, store->size, + diskfs_start_disk_pager (upi, pager_bucket, MAY_CACHE, 0, store->size, &disk_image); upi->p = diskfs_disk_pager; } @@ -595,7 +602,7 @@ diskfs_get_filemap (struct node *np, vm_prot_t prot) upi->unlocked_pagein_length = 0; diskfs_nref_light (np); upi->p = pager_create (upi, pager_bucket, - MAY_CACHE, MEMORY_OBJECT_COPY_DELAY); + MAY_CACHE, MEMORY_OBJECT_COPY_DELAY, 0); if (upi->p == 0) { diskfs_nrele_light (np); -- cgit v1.2.3